<article>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#article10_01_20_2350239</id>
	<title>NASA Designs All-Electric Personal Flight Vehicle</title>
	<author>samzenpus</author>
	<datestamp>1263998160000</datestamp>
	<htmltext>MikeChino writes <i>"NASA is currently working on a <a href="http://www.scientificamerican.com/article.cfm?id=nasa-one-man-stealth-plane">personal aircraft that will put jet packs to shame</a>. The Puffin is an all-electric one-man airplane that could be the start of some new and amazing air travel technology. With two prop electric engines, lithium phosphate batteries and a top speed of almost 300 mph, the vertical take off and landing vehicle was originally designed for covert military insertions because it has a lower heat signature than combustion engines. The Puffin would also be super quiet &ndash; 10 times quieter than current low-noise helicopters, and since the engine is electric it has no flight ceiling and can fly up to 9,150 meters high, uninhibited by thin air."</i></htmltext>
<tokenext>MikeChino writes " NASA is currently working on a personal aircraft that will put jet packs to shame .
The Puffin is an all-electric one-man airplane that could be the start of some new and amazing air travel technology .
With two prop electric engines , lithium phosphate batteries and a top speed of almost 300 mph , the vertical take off and landing vehicle was originally designed for covert military insertions because it has a lower heat signature than combustion engines .
The Puffin would also be super quiet    10 times quieter than current low-noise helicopters , and since the engine is electric it has no flight ceiling and can fly up to 9,150 meters high , uninhibited by thin air .
"</tokentext>
<sentencetext>MikeChino writes "NASA is currently working on a personal aircraft that will put jet packs to shame.
The Puffin is an all-electric one-man airplane that could be the start of some new and amazing air travel technology.
With two prop electric engines, lithium phosphate batteries and a top speed of almost 300 mph, the vertical take off and landing vehicle was originally designed for covert military insertions because it has a lower heat signature than combustion engines.
The Puffin would also be super quiet – 10 times quieter than current low-noise helicopters, and since the engine is electric it has no flight ceiling and can fly up to 9,150 meters high, uninhibited by thin air.
"</sentencetext>
</article>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30848964</id>
	<title>Re:"No flight ceiling"</title>
	<author>nanospook</author>
	<datestamp>1264102680000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Probably 9150 meters is the ceiling.. don't say they didn't tell you so!</htmltext>
<tokenext>Probably 9150 meters is the ceiling.. do n't say they did n't tell you so !</tokentext>
<sentencetext>Probably 9150 meters is the ceiling.. don't say they didn't tell you so!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841504</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846982</id>
	<title>Re:  Is Elmer Gantry Available?</title>
	<author>Anonymous</author>
	<datestamp>1264094400000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Listen:  this isn't for you.  You still aren't going to get a flying car.</p><p>This is for the military.  Add an autonav like a Reaper, and you can have forward-deployed troops resupplied with ammo/food/gear and (possibly) take back the wounded without having to clear an airfield/call SAR/etc.  There will be an entire MOS of the Air Force or Army dedicated to swapping out batteries and running these things.</p></htmltext>
<tokenext>Listen : this is n't for you .
You still are n't going to get a flying car.This is for the military .
Add an autonav like a Reaper , and you can have forward-deployed troops resupplied with ammo/food/gear and ( possibly ) take back the wounded without having to clear an airfield/call SAR/etc .
There will be an entire MOS of the Air Force or Army dedicated to swapping out batteries and running these things .</tokentext>
<sentencetext>Listen:  this isn't for you.
You still aren't going to get a flying car.This is for the military.
Add an autonav like a Reaper, and you can have forward-deployed troops resupplied with ammo/food/gear and (possibly) take back the wounded without having to clear an airfield/call SAR/etc.
There will be an entire MOS of the Air Force or Army dedicated to swapping out batteries and running these things.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841630</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846182</id>
	<title>hideous</title>
	<author>volt4ire</author>
	<datestamp>1264090740000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>and I thought jetpacks were ugly...</htmltext>
<tokenext>and I thought jetpacks were ugly.. .</tokentext>
<sentencetext>and I thought jetpacks were ugly...</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846726</id>
	<title>Re:And part of the project is named Icarus?</title>
	<author>mcgrew</author>
	<datestamp>1264093200000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><i>But would it hurt if occasionally a program was named after Horus or after Odin's raven?<br></i><br><a href="http://slashdot.org/~sm62704/journal/200956" title="slashdot.org">My eye doctor</a> [slashdot.org] doesn't have a raven!</p></htmltext>
<tokenext>But would it hurt if occasionally a program was named after Horus or after Odin 's raven ? My eye doctor [ slashdot.org ] does n't have a raven !</tokentext>
<sentencetext>But would it hurt if occasionally a program was named after Horus or after Odin's raven?My eye doctor [slashdot.org] doesn't have a raven!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841660</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841766</id>
	<title>Useless precision in ceiling</title>
	<author>Anonymous</author>
	<datestamp>1264004460000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>9150m are <a href="http://www.google.com/search?q=9150+m+in+ft" title="google.com" rel="nofollow">30 019.685ft</a> [google.com] - so I presume the original source said<br>
"up to about 30k feet", which obviously is an approximate number.<br>
<br>
Although I salute the conversion to sensible units, the precision implied<br>
is absolutely arbitrary.<br>
<br>
"Up to about <b>9000m</b>" is the number to give.</htmltext>
<tokenext>9150m are 30 019.685ft [ google.com ] - so I presume the original source said " up to about 30k feet " , which obviously is an approximate number .
Although I salute the conversion to sensible units , the precision implied is absolutely arbitrary .
" Up to about 9000m " is the number to give .</tokentext>
<sentencetext>9150m are 30 019.685ft [google.com] - so I presume the original source said
"up to about 30k feet", which obviously is an approximate number.
Although I salute the conversion to sensible units, the precision implied
is absolutely arbitrary.
"Up to about 9000m" is the number to give.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846098</id>
	<title>Wheels?</title>
	<author>joeslugg</author>
	<datestamp>1264090380000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Why does it show it having wheels?  I can't see from the demo video how/when the wheels are used.<br>OTOH, I'd like to see how one moves this to storage (e.g. hangar<nobr> <wbr></nobr>.. er, garage). Maybe you tilt it and<br>push it in, something like a utility dolly.</p><p>Maybe the focus is more on building a working prototype before worrying about such mundane details.</p><p>Maybe I should stop asking questions and end this post.</p><p>Maybe.</p></htmltext>
<tokenext>Why does it show it having wheels ?
I ca n't see from the demo video how/when the wheels are used.OTOH , I 'd like to see how one moves this to storage ( e.g .
hangar .. er , garage ) .
Maybe you tilt it andpush it in , something like a utility dolly.Maybe the focus is more on building a working prototype before worrying about such mundane details.Maybe I should stop asking questions and end this post.Maybe .</tokentext>
<sentencetext>Why does it show it having wheels?
I can't see from the demo video how/when the wheels are used.OTOH, I'd like to see how one moves this to storage (e.g.
hangar .. er, garage).
Maybe you tilt it andpush it in, something like a utility dolly.Maybe the focus is more on building a working prototype before worrying about such mundane details.Maybe I should stop asking questions and end this post.Maybe.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841724</id>
	<title>Re:thin air?</title>
	<author>Thagg</author>
	<datestamp>1264003920000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>4</modscore>
	<htmltext><p>Note well that the highest flying prop plane ever, the <a href="http://en.wikipedia.org/wiki/NASA\_Pathfinder" title="wikipedia.org">Aerovironment Helios</a> [wikipedia.org], flew to 96,000 ft -- far higher than almost any other plane (probably the only one that could sustain that altitude was the SR-71).  The Helios was powered completely by solar cells and electric motors.</p></htmltext>
<tokenext>Note well that the highest flying prop plane ever , the Aerovironment Helios [ wikipedia.org ] , flew to 96,000 ft -- far higher than almost any other plane ( probably the only one that could sustain that altitude was the SR-71 ) .
The Helios was powered completely by solar cells and electric motors .</tokentext>
<sentencetext>Note well that the highest flying prop plane ever, the Aerovironment Helios [wikipedia.org], flew to 96,000 ft -- far higher than almost any other plane (probably the only one that could sustain that altitude was the SR-71).
The Helios was powered completely by solar cells and electric motors.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841524</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842804</id>
	<title>Re:A Tail Sitter?</title>
	<author>westlake</author>
	<datestamp>1264013700000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><i>The Puffin would have the pilot in a standing position during takeoff and landing.</i> </p><p>I'm still not convinced this gives him the visibility and control he needs.</p><p>The tail sitters spend most of their time in tethered flight inside a hanger. This ultralight tail sitter looks like it could be batted about by a heavy breeze.</p></htmltext>
<tokenext>The Puffin would have the pilot in a standing position during takeoff and landing .
I 'm still not convinced this gives him the visibility and control he needs.The tail sitters spend most of their time in tethered flight inside a hanger .
This ultralight tail sitter looks like it could be batted about by a heavy breeze .</tokentext>
<sentencetext>The Puffin would have the pilot in a standing position during takeoff and landing.
I'm still not convinced this gives him the visibility and control he needs.The tail sitters spend most of their time in tethered flight inside a hanger.
This ultralight tail sitter looks like it could be batted about by a heavy breeze.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841988</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842004</id>
	<title>Electric Planes</title>
	<author>sunfly</author>
	<datestamp>1264006740000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Very high quality realistic designs are already flying, one of my favorite is the <a href="http://yuneec.com/" title="yuneec.com" rel="nofollow">Yuneec e430</a> [yuneec.com]</htmltext>
<tokenext>Very high quality realistic designs are already flying , one of my favorite is the Yuneec e430 [ yuneec.com ]</tokentext>
<sentencetext>Very high quality realistic designs are already flying, one of my favorite is the Yuneec e430 [yuneec.com]</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843054</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>Anonymous</author>
	<datestamp>1264016700000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>It's bad, but not quite that bad. Electric motor efficiency is about three times higher than combustion engine efficiency. Electric motors are also lighter and require less infrastructure.</p></htmltext>
<tokenext>It 's bad , but not quite that bad .
Electric motor efficiency is about three times higher than combustion engine efficiency .
Electric motors are also lighter and require less infrastructure .</tokentext>
<sentencetext>It's bad, but not quite that bad.
Electric motor efficiency is about three times higher than combustion engine efficiency.
Electric motors are also lighter and require less infrastructure.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842826</id>
	<title>Re:Go the "Green Spin"</title>
	<author>TapeCutter</author>
	<datestamp>1264013940000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Pot meets kettle, environmentally\_friendly != environmentally\_perfect.</htmltext>
<tokenext>Pot meets kettle , environmentally \ _friendly ! = environmentally \ _perfect .</tokentext>
<sentencetext>Pot meets kettle, environmentally\_friendly != environmentally\_perfect.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841576</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843362</id>
	<title>Strange use of technology...</title>
	<author>Sk1dmark</author>
	<datestamp>1264107420000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>If the batteries are that good, why not put them in a car and solve some of the environment problems?</htmltext>
<tokenext>If the batteries are that good , why not put them in a car and solve some of the environment problems ?</tokentext>
<sentencetext>If the batteries are that good, why not put them in a car and solve some of the environment problems?</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844092</id>
	<title>Colombia</title>
	<author>dimethylxanthine</author>
	<datestamp>1264074120000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><blockquote><div><p>a personal aircraft that will put jet packs to shame</p></div></blockquote><p>
This is also going to put to shape low-depth colombian cocaine transporting submarines and ones this gets popular with terrorists will give the DHS one more reason to to warrentless searching and nuking of any MEHV's.

That's, of course, unless terrorism and illegal drug trafficking become obsolete...</p></div>
	</htmltext>
<tokenext>a personal aircraft that will put jet packs to shame This is also going to put to shape low-depth colombian cocaine transporting submarines and ones this gets popular with terrorists will give the DHS one more reason to to warrentless searching and nuking of any MEHV 's .
That 's , of course , unless terrorism and illegal drug trafficking become obsolete.. .</tokentext>
<sentencetext>a personal aircraft that will put jet packs to shame
This is also going to put to shape low-depth colombian cocaine transporting submarines and ones this gets popular with terrorists will give the DHS one more reason to to warrentless searching and nuking of any MEHV's.
That's, of course, unless terrorism and illegal drug trafficking become obsolete...
	</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844936</id>
	<title>Re:when i can buy one at walmart</title>
	<author>tibman</author>
	<datestamp>1264084080000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>What? Likes cars, porn, and a decent video card?</p></htmltext>
<tokenext>What ?
Likes cars , porn , and a decent video card ?</tokentext>
<sentencetext>What?
Likes cars, porn, and a decent video card?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841578</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30845914</id>
	<title>Re:Innumeracy?</title>
	<author>Anonymous</author>
	<datestamp>1264089660000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Both.  Pedanticism is a good thing, especially when drawing attention to exaggerations in advertising.  Like when they claim "4 times more" and it's really "4 times as much" (so they should say "3 times more").</p></htmltext>
<tokenext>Both .
Pedanticism is a good thing , especially when drawing attention to exaggerations in advertising .
Like when they claim " 4 times more " and it 's really " 4 times as much " ( so they should say " 3 times more " ) .</tokentext>
<sentencetext>Both.
Pedanticism is a good thing, especially when drawing attention to exaggerations in advertising.
Like when they claim "4 times more" and it's really "4 times as much" (so they should say "3 times more").</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841760</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841670</id>
	<title>Re:My question is..</title>
	<author>ZosX</author>
	<datestamp>1264003380000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Seeing as how they are now making R/C planes with electric motors (the jet models come to mind) I think this could have some sort of reasonable range. Even a couple of hundred miles would be plenty. Remember that airplanes can be more efficient than cars because there is actually much less resistance.</p></htmltext>
<tokenext>Seeing as how they are now making R/C planes with electric motors ( the jet models come to mind ) I think this could have some sort of reasonable range .
Even a couple of hundred miles would be plenty .
Remember that airplanes can be more efficient than cars because there is actually much less resistance .</tokentext>
<sentencetext>Seeing as how they are now making R/C planes with electric motors (the jet models come to mind) I think this could have some sort of reasonable range.
Even a couple of hundred miles would be plenty.
Remember that airplanes can be more efficient than cars because there is actually much less resistance.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841530</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844040</id>
	<title>Re:thin air?</title>
	<author>Dr\_Terminus</author>
	<datestamp>1264073640000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Considering the Grob Egrett (http://en.wikipedia.org/wiki/Grob/E-Systems/AlliedSignal\_Egrett) has a ceiling of 13 km and is driven by a turboprop, I dont see any reason why the Puffin shouldnt be able to go to 9km.</p></htmltext>
<tokenext>Considering the Grob Egrett ( http : //en.wikipedia.org/wiki/Grob/E-Systems/AlliedSignal \ _Egrett ) has a ceiling of 13 km and is driven by a turboprop , I dont see any reason why the Puffin shouldnt be able to go to 9km .</tokentext>
<sentencetext>Considering the Grob Egrett (http://en.wikipedia.org/wiki/Grob/E-Systems/AlliedSignal\_Egrett) has a ceiling of 13 km and is driven by a turboprop, I dont see any reason why the Puffin shouldnt be able to go to 9km.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841524</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843048</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>evilviper</author>
	<datestamp>1264016520000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><blockquote><div><p>Li-ion-anything has an energy density equaling 1\% of gasoline.</p></div></blockquote><p>Water has even better energy density.  Fuel and oxidizer in one compact package!</p></div>
	</htmltext>
<tokenext>Li-ion-anything has an energy density equaling 1 \ % of gasoline.Water has even better energy density .
Fuel and oxidizer in one compact package !</tokentext>
<sentencetext>Li-ion-anything has an energy density equaling 1\% of gasoline.Water has even better energy density.
Fuel and oxidizer in one compact package!
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846258</id>
	<title>Is it just me...</title>
	<author>OneSmartFellow</author>
	<datestamp>1264091040000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>... or does that thing look like <a href="http://www.sacredart-murals.co.uk/images/Mural\%20Rooms/Shrek-ToyStory-Monsters-inc/shrek\_06.jpg" title="sacredart-murals.co.uk">http://www.sacredart-murals.co.uk/images/Mural\%20Rooms/Shrek-ToyStory-Monsters-inc/shrek\_06.jpg</a> [sacredart-murals.co.uk]</htmltext>
<tokenext>... or does that thing look like http : //www.sacredart-murals.co.uk/images/Mural \ % 20Rooms/Shrek-ToyStory-Monsters-inc/shrek \ _06.jpg [ sacredart-murals.co.uk ]</tokentext>
<sentencetext>... or does that thing look like http://www.sacredart-murals.co.uk/images/Mural\%20Rooms/Shrek-ToyStory-Monsters-inc/shrek\_06.jpg [sacredart-murals.co.uk]</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846948</id>
	<title>Re:Cool toy, but we can't have it.</title>
	<author>Beezlebub33</author>
	<datestamp>1264094280000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>This seems to be offset by the new category of light sport aircraft and the sport pilot certification.  How are they simultaneously trying to expand flying and reduce flying?</htmltext>
<tokenext>This seems to be offset by the new category of light sport aircraft and the sport pilot certification .
How are they simultaneously trying to expand flying and reduce flying ?</tokentext>
<sentencetext>This seems to be offset by the new category of light sport aircraft and the sport pilot certification.
How are they simultaneously trying to expand flying and reduce flying?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841602</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30856720</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>Anonymous</author>
	<datestamp>1264100100000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Well, you can buy two battery powered 2-seater aircraft now, announced at Oskosh 2009.   Endurance ~ 2-3 hours, 100km/h speed.</p></htmltext>
<tokenext>Well , you can buy two battery powered 2-seater aircraft now , announced at Oskosh 2009 .
Endurance ~ 2-3 hours , 100km/h speed .</tokentext>
<sentencetext>Well, you can buy two battery powered 2-seater aircraft now, announced at Oskosh 2009.
Endurance ~ 2-3 hours, 100km/h speed.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841660</id>
	<title>And part of the project is named Icarus?</title>
	<author>Anonymous</author>
	<datestamp>1264003320000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>5</modscore>
	<htmltext>I don't understand why so many flight related programs are named Icarus. Let's remember what happened in the myth of Icarus: He flew too close to the sun and so he died. I can't tell if such program names are deliberately humorous (hah! Let's see if we can get pilots to fly in something named Icarus! Yeah, I already did that. Let's try to see if we can get them to test out a project named after a flightless bird. Maybe something like a kakapo <a href="http://en.wikipedia.org/wiki/Kakapo" title="wikipedia.org">http://en.wikipedia.org/wiki/Kakapo</a> [wikipedia.org] that sometimes gets hurt from thinking it can fly when it can't), or if they just don't know any other myths related to flight, or if this is a deliberate comment about how many classical claims about "hubris" simply hold humans back from genuine progress. But would it hurt if occasionally a program was named after Horus or after Odin's raven?</htmltext>
<tokenext>I do n't understand why so many flight related programs are named Icarus .
Let 's remember what happened in the myth of Icarus : He flew too close to the sun and so he died .
I ca n't tell if such program names are deliberately humorous ( hah !
Let 's see if we can get pilots to fly in something named Icarus !
Yeah , I already did that .
Let 's try to see if we can get them to test out a project named after a flightless bird .
Maybe something like a kakapo http : //en.wikipedia.org/wiki/Kakapo [ wikipedia.org ] that sometimes gets hurt from thinking it can fly when it ca n't ) , or if they just do n't know any other myths related to flight , or if this is a deliberate comment about how many classical claims about " hubris " simply hold humans back from genuine progress .
But would it hurt if occasionally a program was named after Horus or after Odin 's raven ?</tokentext>
<sentencetext>I don't understand why so many flight related programs are named Icarus.
Let's remember what happened in the myth of Icarus: He flew too close to the sun and so he died.
I can't tell if such program names are deliberately humorous (hah!
Let's see if we can get pilots to fly in something named Icarus!
Yeah, I already did that.
Let's try to see if we can get them to test out a project named after a flightless bird.
Maybe something like a kakapo http://en.wikipedia.org/wiki/Kakapo [wikipedia.org] that sometimes gets hurt from thinking it can fly when it can't), or if they just don't know any other myths related to flight, or if this is a deliberate comment about how many classical claims about "hubris" simply hold humans back from genuine progress.
But would it hurt if occasionally a program was named after Horus or after Odin's raven?</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844030</id>
	<title>Re:Earth to Orbit vehicle?</title>
	<author>hitmark</author>
	<datestamp>1264073460000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>that is basically what <a href="http://en.wikipedia.org/wiki/WhiteKnightTwo" title="wikipedia.org">http://en.wikipedia.org/wiki/WhiteKnightTwo</a> [wikipedia.org] will do to <a href="http://en.wikipedia.org/wiki/Scaled\_Composites\_SpaceShipTwo" title="wikipedia.org">http://en.wikipedia.org/wiki/Scaled\_Composites\_SpaceShipTwo</a> [wikipedia.org]</p></htmltext>
<tokenext>that is basically what http : //en.wikipedia.org/wiki/WhiteKnightTwo [ wikipedia.org ] will do to http : //en.wikipedia.org/wiki/Scaled \ _Composites \ _SpaceShipTwo [ wikipedia.org ]</tokentext>
<sentencetext>that is basically what http://en.wikipedia.org/wiki/WhiteKnightTwo [wikipedia.org] will do to http://en.wikipedia.org/wiki/Scaled\_Composites\_SpaceShipTwo [wikipedia.org]</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841756</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841756</id>
	<title>Earth to Orbit vehicle?</title>
	<author>DJRumpy</author>
	<datestamp>1264004340000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>This is odd that someone hasn't already cashed in on this. Is this a possible precursor to a simple earth to orbit vehicle? From what I read in TFA, the limit quoted is simply due to the capacity of the batteries, however this uses a simple rotary blade system similar to a helicopter for lift. It would definitely fail when the atmosphere thinned out.</p><p>Can someone familiar with this type of design give an idea of exactly how high this could be expected to fly if the batteries were not the limiting factor?</p></htmltext>
<tokenext>This is odd that someone has n't already cashed in on this .
Is this a possible precursor to a simple earth to orbit vehicle ?
From what I read in TFA , the limit quoted is simply due to the capacity of the batteries , however this uses a simple rotary blade system similar to a helicopter for lift .
It would definitely fail when the atmosphere thinned out.Can someone familiar with this type of design give an idea of exactly how high this could be expected to fly if the batteries were not the limiting factor ?</tokentext>
<sentencetext>This is odd that someone hasn't already cashed in on this.
Is this a possible precursor to a simple earth to orbit vehicle?
From what I read in TFA, the limit quoted is simply due to the capacity of the batteries, however this uses a simple rotary blade system similar to a helicopter for lift.
It would definitely fail when the atmosphere thinned out.Can someone familiar with this type of design give an idea of exactly how high this could be expected to fly if the batteries were not the limiting factor?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841504</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844480</id>
	<title>When can I buy one from FORD, GM or CHRYSTLER</title>
	<author>Anonymous</author>
	<datestamp>1264079400000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>I'd never trust my life to a vehicle made by the lowest bidder, sold for the lowest price, from substandard parts sourced from China.  Meanwhile, "The Big Three" really need to come up with something that revolutionizes transportation, and this could be it.  Don't forget that they've built and sold transportation products, and have much lower opportunity cost than Wally World does.</p></htmltext>
<tokenext>I 'd never trust my life to a vehicle made by the lowest bidder , sold for the lowest price , from substandard parts sourced from China .
Meanwhile , " The Big Three " really need to come up with something that revolutionizes transportation , and this could be it .
Do n't forget that they 've built and sold transportation products , and have much lower opportunity cost than Wally World does .</tokentext>
<sentencetext>I'd never trust my life to a vehicle made by the lowest bidder, sold for the lowest price, from substandard parts sourced from China.
Meanwhile, "The Big Three" really need to come up with something that revolutionizes transportation, and this could be it.
Don't forget that they've built and sold transportation products, and have much lower opportunity cost than Wally World does.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841578</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841628</id>
	<title>Re:thin air?</title>
	<author>MichaelSmith</author>
	<datestamp>1264003020000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>I thought NASA had solved our orbital launch problems for ever.</p></htmltext>
<tokenext>I thought NASA had solved our orbital launch problems for ever .</tokentext>
<sentencetext>I thought NASA had solved our orbital launch problems for ever.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841524</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30847534</id>
	<title>Re:And we'll never be allowed to have one</title>
	<author>mcgrew</author>
	<datestamp>1264096500000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><i>The changes this would make to society are too great. The politicians would never allow common people to have that much freedom. No borders, no passports, no way of stopping people from going where they wanted, when they wanted.</i></p><p>That sounds like the internet, only the internet is more so, and back when Murray Leinster wrote <a href="http://www.baen.com/chapters/W200506/0743499107\_\_\_2.htm" title="baen.com">A Logic Named Joe</a> [baen.com] (Full text of the story at the link, it's a good, albeit dated, science fiction story) they would have said the same thing about the internet then if anybody could have believed such a thing could ever be developed.</p><p><i>One asshole with one of these and a pocketful of golf balls could cause carnage in a city centre at rush hour - no way to track or find the culprit afterwards.</i></p><p>One asshole with a pocket full of golf balls could do the same thing from the top of a tall building, only more easily.</p><p><i>there'll be idiots who'll be delighted to abuse this even worse. Drug dealers, criminals of any kind who want to make a clean getaway (get 10 feet off the ground and nobody's catching you, no matter how fast the police car). </i></p><p>The police won't be allowee to use these? The same could have been said of the automobile when it was new. Besides, didn't you see <i>Star Trek</i> where the cop outruns young Kirk, who is driving a vintage Corvette, with his flying motorcycle?</p></htmltext>
<tokenext>The changes this would make to society are too great .
The politicians would never allow common people to have that much freedom .
No borders , no passports , no way of stopping people from going where they wanted , when they wanted.That sounds like the internet , only the internet is more so , and back when Murray Leinster wrote A Logic Named Joe [ baen.com ] ( Full text of the story at the link , it 's a good , albeit dated , science fiction story ) they would have said the same thing about the internet then if anybody could have believed such a thing could ever be developed.One asshole with one of these and a pocketful of golf balls could cause carnage in a city centre at rush hour - no way to track or find the culprit afterwards.One asshole with a pocket full of golf balls could do the same thing from the top of a tall building , only more easily.there 'll be idiots who 'll be delighted to abuse this even worse .
Drug dealers , criminals of any kind who want to make a clean getaway ( get 10 feet off the ground and nobody 's catching you , no matter how fast the police car ) .
The police wo n't be allowee to use these ?
The same could have been said of the automobile when it was new .
Besides , did n't you see Star Trek where the cop outruns young Kirk , who is driving a vintage Corvette , with his flying motorcycle ?</tokentext>
<sentencetext>The changes this would make to society are too great.
The politicians would never allow common people to have that much freedom.
No borders, no passports, no way of stopping people from going where they wanted, when they wanted.That sounds like the internet, only the internet is more so, and back when Murray Leinster wrote A Logic Named Joe [baen.com] (Full text of the story at the link, it's a good, albeit dated, science fiction story) they would have said the same thing about the internet then if anybody could have believed such a thing could ever be developed.One asshole with one of these and a pocketful of golf balls could cause carnage in a city centre at rush hour - no way to track or find the culprit afterwards.One asshole with a pocket full of golf balls could do the same thing from the top of a tall building, only more easily.there'll be idiots who'll be delighted to abuse this even worse.
Drug dealers, criminals of any kind who want to make a clean getaway (get 10 feet off the ground and nobody's catching you, no matter how fast the police car).
The police won't be allowee to use these?
The same could have been said of the automobile when it was new.
Besides, didn't you see Star Trek where the cop outruns young Kirk, who is driving a vintage Corvette, with his flying motorcycle?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843758</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842172</id>
	<title>Re:CG concept only</title>
	<author>Required Snark</author>
	<datestamp>1264008480000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Why is there a requirement that NASA build a full scale version? Because you said so? They are building and flying a 1/3 scale version to test the design. It will be used to test the transition between vertical take off, horizontal flight, and vertical landing. If they were to go further with this design it is a reasonable step to take.  So how is this not real?
<p>
You want a full scale version, how about you fund it yourself.  NASA has procedures for working with outside organizations. You could do it out of your vast personal fortune, or raise the venture funding.
</p><p>The last I heard NASA did research, not making production prototypes. I would say this is in their charter. Why are you bitching?</p></htmltext>
<tokenext>Why is there a requirement that NASA build a full scale version ?
Because you said so ?
They are building and flying a 1/3 scale version to test the design .
It will be used to test the transition between vertical take off , horizontal flight , and vertical landing .
If they were to go further with this design it is a reasonable step to take .
So how is this not real ?
You want a full scale version , how about you fund it yourself .
NASA has procedures for working with outside organizations .
You could do it out of your vast personal fortune , or raise the venture funding .
The last I heard NASA did research , not making production prototypes .
I would say this is in their charter .
Why are you bitching ?</tokentext>
<sentencetext>Why is there a requirement that NASA build a full scale version?
Because you said so?
They are building and flying a 1/3 scale version to test the design.
It will be used to test the transition between vertical take off, horizontal flight, and vertical landing.
If they were to go further with this design it is a reasonable step to take.
So how is this not real?
You want a full scale version, how about you fund it yourself.
NASA has procedures for working with outside organizations.
You could do it out of your vast personal fortune, or raise the venture funding.
The last I heard NASA did research, not making production prototypes.
I would say this is in their charter.
Why are you bitching?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841506</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841932</id>
	<title>Re:  Is Elmer Gantry Available?</title>
	<author>Sir\_Lewk</author>
	<datestamp>1264006020000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Three words:  Heated pressure suits.</p></htmltext>
<tokenext>Three words : Heated pressure suits .</tokentext>
<sentencetext>Three words:  Heated pressure suits.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841630</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30845486</id>
	<title>Re:One-man!</title>
	<author>Anonymous</author>
	<datestamp>1264087680000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Well, there was no room to put a normal flight stick so...</p></htmltext>
<tokenext>Well , there was no room to put a normal flight stick so.. .</tokentext>
<sentencetext>Well, there was no room to put a normal flight stick so...</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843972</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846486</id>
	<title>Excellent design</title>
	<author>xednieht</author>
	<datestamp>1264092060000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>It is very conveniently designed with a dual purpose - VTOL and coffin.  Rip off the wings and you could be buried in it.</htmltext>
<tokenext>It is very conveniently designed with a dual purpose - VTOL and coffin .
Rip off the wings and you could be buried in it .</tokentext>
<sentencetext>It is very conveniently designed with a dual purpose - VTOL and coffin.
Rip off the wings and you could be buried in it.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844184</id>
	<title>Re:Innumeracy?</title>
	<author>evilWurst</author>
	<datestamp>1264075200000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>2</modscore>
	<htmltext><p>You're not being bad. The "x times less" construct is really clumsy. IMO, it's mainly journalists and marketers using it; they're just punching (small new number) / (big old number) into a calculator, rounding it, and then the brain shuts off and they just say the new one is (result) times less.</p><p>The slashdot summary blurb is even worse, since sound is measured in decibels, which aren't linear. (IIRC, 3 db is a factor of two... so 33 db would be twice as loud as 30 db, and half as loud as 36 db). So if a normal helicopter was 120 db and the electric was 12 db and someone said "ten times quieter" they'd be very, very, very wrong. The actual article at least gives the electric volume as 50 db and compares it to the volume of spoken conversation, so you can at least ignore the potentially misleading math part in this case. Then again, it says that's the volume from 150 meters away... obviously it'd be much louder for the one flying it.</p></htmltext>
<tokenext>You 're not being bad .
The " x times less " construct is really clumsy .
IMO , it 's mainly journalists and marketers using it ; they 're just punching ( small new number ) / ( big old number ) into a calculator , rounding it , and then the brain shuts off and they just say the new one is ( result ) times less.The slashdot summary blurb is even worse , since sound is measured in decibels , which are n't linear .
( IIRC , 3 db is a factor of two... so 33 db would be twice as loud as 30 db , and half as loud as 36 db ) .
So if a normal helicopter was 120 db and the electric was 12 db and someone said " ten times quieter " they 'd be very , very , very wrong .
The actual article at least gives the electric volume as 50 db and compares it to the volume of spoken conversation , so you can at least ignore the potentially misleading math part in this case .
Then again , it says that 's the volume from 150 meters away... obviously it 'd be much louder for the one flying it .</tokentext>
<sentencetext>You're not being bad.
The "x times less" construct is really clumsy.
IMO, it's mainly journalists and marketers using it; they're just punching (small new number) / (big old number) into a calculator, rounding it, and then the brain shuts off and they just say the new one is (result) times less.The slashdot summary blurb is even worse, since sound is measured in decibels, which aren't linear.
(IIRC, 3 db is a factor of two... so 33 db would be twice as loud as 30 db, and half as loud as 36 db).
So if a normal helicopter was 120 db and the electric was 12 db and someone said "ten times quieter" they'd be very, very, very wrong.
The actual article at least gives the electric volume as 50 db and compares it to the volume of spoken conversation, so you can at least ignore the potentially misleading math part in this case.
Then again, it says that's the volume from 150 meters away... obviously it'd be much louder for the one flying it.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841760</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843988</id>
	<title>Battery technology</title>
	<author>mrjb</author>
	<datestamp>1264072860000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>As long as I see the batteries in my electric toothbrush, navigation system and laptop fail to hold more than a minute worth of charge, I'd rather not get off the ground too far in one of these.</htmltext>
<tokenext>As long as I see the batteries in my electric toothbrush , navigation system and laptop fail to hold more than a minute worth of charge , I 'd rather not get off the ground too far in one of these .</tokentext>
<sentencetext>As long as I see the batteries in my electric toothbrush, navigation system and laptop fail to hold more than a minute worth of charge, I'd rather not get off the ground too far in one of these.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842502</id>
	<title>I see...</title>
	<author>DieByWire</author>
	<datestamp>1264011000000</datestamp>
	<modclass>Funny</modclass>
	<modscore>4</modscore>
	<htmltext>I see dead people.</htmltext>
<tokenext>I see dead people .</tokentext>
<sentencetext>I see dead people.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</id>
	<title>Battery powered aircraft:Completely unrealistic</title>
	<author>Anonymous</author>
	<datestamp>1264005060000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>3</modscore>
	<htmltext><p>Li-ion-anything has an energy density equaling 1\% of gasoline.  Lithium phosphate batteries are worse than others in energy density, but safer.</p><p>So for the same fuel weight, instead of a 2 hour flight reserve, you would have 72 seconds.</p><p>Until there is a radically different battery, this is unrealistic.</p></htmltext>
<tokenext>Li-ion-anything has an energy density equaling 1 \ % of gasoline .
Lithium phosphate batteries are worse than others in energy density , but safer.So for the same fuel weight , instead of a 2 hour flight reserve , you would have 72 seconds.Until there is a radically different battery , this is unrealistic .</tokentext>
<sentencetext>Li-ion-anything has an energy density equaling 1\% of gasoline.
Lithium phosphate batteries are worse than others in energy density, but safer.So for the same fuel weight, instead of a 2 hour flight reserve, you would have 72 seconds.Until there is a radically different battery, this is unrealistic.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842782</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>jamesh</author>
	<datestamp>1264013520000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>According to TFA, the electric engine is ~95\% efficient, vs ~20\% for a gasoline engine. So we're up to nearly 6 minutes now<nobr> <wbr></nobr>:)</p></htmltext>
<tokenext>According to TFA , the electric engine is ~ 95 \ % efficient , vs ~ 20 \ % for a gasoline engine .
So we 're up to nearly 6 minutes now : )</tokentext>
<sentencetext>According to TFA, the electric engine is ~95\% efficient, vs ~20\% for a gasoline engine.
So we're up to nearly 6 minutes now :)</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841614</id>
	<title>Meh...</title>
	<author>Anonymous</author>
	<datestamp>1264002900000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>The Mythbusters already built one.  Nothing to see here, move along.</p></htmltext>
<tokenext>The Mythbusters already built one .
Nothing to see here , move along .</tokentext>
<sentencetext>The Mythbusters already built one.
Nothing to see here, move along.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843276</id>
	<title>Cute Flick, But Icarus?!</title>
	<author>LifesABeach</author>
	<datestamp>1264106400000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Gasp! I RTFA.  I would love to fly over the grid lock of the 405 Freeway during rush hour;  please NASA, don't screw the pouch on this one;  (maybe after this project, NASA can stop playing around and get back to sending us to the moon?)  The flick looked cool, but what/where are the specifications?</htmltext>
<tokenext>Gasp !
I RTFA .
I would love to fly over the grid lock of the 405 Freeway during rush hour ; please NASA , do n't screw the pouch on this one ; ( maybe after this project , NASA can stop playing around and get back to sending us to the moon ?
) The flick looked cool , but what/where are the specifications ?</tokentext>
<sentencetext>Gasp!
I RTFA.
I would love to fly over the grid lock of the 405 Freeway during rush hour;  please NASA, don't screw the pouch on this one;  (maybe after this project, NASA can stop playing around and get back to sending us to the moon?
)  The flick looked cool, but what/where are the specifications?</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846650</id>
	<title>Re:Cool toy, but we can't have it.</title>
	<author>mcgrew</author>
	<datestamp>1264092840000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><i>The FAA is trying to essentially eliminate community airfields with their regulations and "anti-terrorist" programs. While I'd love to be able to fly to work, it's just not.going.to.happen.<br></i><br>Never say never. Things change, sometimes quickly. I never thought I'd see the US using torture, or denying Habeus Corpus, or imprisoning people without trial, but it happened. And the pendulum always swings back.</p><p>In 57 years you see a lot of shit happen.</p></htmltext>
<tokenext>The FAA is trying to essentially eliminate community airfields with their regulations and " anti-terrorist " programs .
While I 'd love to be able to fly to work , it 's just not.going.to.happen.Never say never .
Things change , sometimes quickly .
I never thought I 'd see the US using torture , or denying Habeus Corpus , or imprisoning people without trial , but it happened .
And the pendulum always swings back.In 57 years you see a lot of shit happen .</tokentext>
<sentencetext>The FAA is trying to essentially eliminate community airfields with their regulations and "anti-terrorist" programs.
While I'd love to be able to fly to work, it's just not.going.to.happen.Never say never.
Things change, sometimes quickly.
I never thought I'd see the US using torture, or denying Habeus Corpus, or imprisoning people without trial, but it happened.
And the pendulum always swings back.In 57 years you see a lot of shit happen.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841602</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30849604</id>
	<title>Re:Still only 20 minutes</title>
	<author>Deosyne</author>
	<datestamp>1264105380000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Far enough to get me to work, although I'd have to recharge here before heading home.</p></htmltext>
<tokenext>Far enough to get me to work , although I 'd have to recharge here before heading home .</tokentext>
<sentencetext>Far enough to get me to work, although I'd have to recharge here before heading home.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841706</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841786</id>
	<title>Re:"No flight ceiling"</title>
	<author>Anonymous</author>
	<datestamp>1264004640000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>3</modscore>
	<htmltext><p>Not only does it become difficult to generate lift, but to keep the electric motors cooled. You're always going to have losses in the form of heat and that's generally carried away by the air moving past the motor. An overheated motor when that's what's keeping you from plummeting isn't cool... literally.</p></htmltext>
<tokenext>Not only does it become difficult to generate lift , but to keep the electric motors cooled .
You 're always going to have losses in the form of heat and that 's generally carried away by the air moving past the motor .
An overheated motor when that 's what 's keeping you from plummeting is n't cool... literally .</tokentext>
<sentencetext>Not only does it become difficult to generate lift, but to keep the electric motors cooled.
You're always going to have losses in the form of heat and that's generally carried away by the air moving past the motor.
An overheated motor when that's what's keeping you from plummeting isn't cool... literally.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841504</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844534</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>Anonymous</author>
	<datestamp>1264080060000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>But remember efficiency of electric motors is 3-4 times that of (IC) gasoline engines. So ~250 seconds.</p></htmltext>
<tokenext>But remember efficiency of electric motors is 3-4 times that of ( IC ) gasoline engines .
So ~ 250 seconds .</tokentext>
<sentencetext>But remember efficiency of electric motors is 3-4 times that of (IC) gasoline engines.
So ~250 seconds.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841954</id>
	<title>Hard ceiling</title>
	<author>viking80</author>
	<datestamp>1264006200000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Have installed aircooled equipment in aircrafts. Already at 5000m, air density is 50\% of sealevel. Your cooling fan will have to suck in 200\% of the air. At the same time, the rotors have to work harder to hold you up in the thin air. That requires more cooling as well. Maybe 300\% at 5000m. At 10000m, maybe 1,000\% increase.</p><p>You will quickly reach a hard ceiling. And with 60 seconds of battery life it is pretty theoretical anyway.</p></htmltext>
<tokenext>Have installed aircooled equipment in aircrafts .
Already at 5000m , air density is 50 \ % of sealevel .
Your cooling fan will have to suck in 200 \ % of the air .
At the same time , the rotors have to work harder to hold you up in the thin air .
That requires more cooling as well .
Maybe 300 \ % at 5000m .
At 10000m , maybe 1,000 \ % increase.You will quickly reach a hard ceiling .
And with 60 seconds of battery life it is pretty theoretical anyway .</tokentext>
<sentencetext>Have installed aircooled equipment in aircrafts.
Already at 5000m, air density is 50\% of sealevel.
Your cooling fan will have to suck in 200\% of the air.
At the same time, the rotors have to work harder to hold you up in the thin air.
That requires more cooling as well.
Maybe 300\% at 5000m.
At 10000m, maybe 1,000\% increase.You will quickly reach a hard ceiling.
And with 60 seconds of battery life it is pretty theoretical anyway.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843758</id>
	<title>And we'll never be allowed to have one</title>
	<author>Leo Sasquatch</author>
	<datestamp>1264069560000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>2</modscore>
	<htmltext>Go read Bob Shaw's 'Vertigo'.
<br> <br>
The changes this would make to society are too great.  The politicians would never allow common people to have that much freedom.  No borders, no passports, no way of stopping people from going where they wanted, when they wanted.  And that's without assuming any purpose more nefarious than a cheap weekend in Amsterdam.
<br> <br>
One asshole with one of these and a pocketful of golf balls could cause carnage in a city centre at rush hour - no way to track or find the culprit afterwards.  As long as there's idiots who think throwing rocks off motorway bridges is a fun thing to do, there'll be idiots who'll be delighted to abuse this even worse.  Drug dealers, criminals of any kind who want to make a clean getaway (get 10 feet off the ground and nobody's catching you, no matter how fast the police car).
<br> <br>
It's not the physics of flight, or fuel capacity, or engine efficiency that will stop us ever getting personal flight vehicles - it's the politicians who will legislate it out of existence for all but the very rich, because whatever rich people want is always all right.  And they'll do it in the name of safety, and it'll be for our own good.  There'll be a huge furore in the media when the first one crashes and kills someone, and that'll be it done with.</htmltext>
<tokenext>Go read Bob Shaw 's 'Vertigo' .
The changes this would make to society are too great .
The politicians would never allow common people to have that much freedom .
No borders , no passports , no way of stopping people from going where they wanted , when they wanted .
And that 's without assuming any purpose more nefarious than a cheap weekend in Amsterdam .
One asshole with one of these and a pocketful of golf balls could cause carnage in a city centre at rush hour - no way to track or find the culprit afterwards .
As long as there 's idiots who think throwing rocks off motorway bridges is a fun thing to do , there 'll be idiots who 'll be delighted to abuse this even worse .
Drug dealers , criminals of any kind who want to make a clean getaway ( get 10 feet off the ground and nobody 's catching you , no matter how fast the police car ) .
It 's not the physics of flight , or fuel capacity , or engine efficiency that will stop us ever getting personal flight vehicles - it 's the politicians who will legislate it out of existence for all but the very rich , because whatever rich people want is always all right .
And they 'll do it in the name of safety , and it 'll be for our own good .
There 'll be a huge furore in the media when the first one crashes and kills someone , and that 'll be it done with .</tokentext>
<sentencetext>Go read Bob Shaw's 'Vertigo'.
The changes this would make to society are too great.
The politicians would never allow common people to have that much freedom.
No borders, no passports, no way of stopping people from going where they wanted, when they wanted.
And that's without assuming any purpose more nefarious than a cheap weekend in Amsterdam.
One asshole with one of these and a pocketful of golf balls could cause carnage in a city centre at rush hour - no way to track or find the culprit afterwards.
As long as there's idiots who think throwing rocks off motorway bridges is a fun thing to do, there'll be idiots who'll be delighted to abuse this even worse.
Drug dealers, criminals of any kind who want to make a clean getaway (get 10 feet off the ground and nobody's catching you, no matter how fast the police car).
It's not the physics of flight, or fuel capacity, or engine efficiency that will stop us ever getting personal flight vehicles - it's the politicians who will legislate it out of existence for all but the very rich, because whatever rich people want is always all right.
And they'll do it in the name of safety, and it'll be for our own good.
There'll be a huge furore in the media when the first one crashes and kills someone, and that'll be it done with.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841898</id>
	<title>Re:Go the "Green Spin"</title>
	<author>im\_thatoneguy</author>
	<datestamp>1264005780000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Could always install one of those light aircraft parachutes they've got now a days.  Trick would be finding a place to set it down in an urban setting.</p></htmltext>
<tokenext>Could always install one of those light aircraft parachutes they 've got now a days .
Trick would be finding a place to set it down in an urban setting .</tokentext>
<sentencetext>Could always install one of those light aircraft parachutes they've got now a days.
Trick would be finding a place to set it down in an urban setting.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841576</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841920</id>
	<title>Re:Uncle</title>
	<author>im\_thatoneguy</author>
	<datestamp>1264005960000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Why have a pilot?   I doubt the thing will stay airborne without a computer anyway.     I can't believe that a pilot would be as capable as an autopilot computer in this instance.</p></htmltext>
<tokenext>Why have a pilot ?
I doubt the thing will stay airborne without a computer anyway .
I ca n't believe that a pilot would be as capable as an autopilot computer in this instance .</tokentext>
<sentencetext>Why have a pilot?
I doubt the thing will stay airborne without a computer anyway.
I can't believe that a pilot would be as capable as an autopilot computer in this instance.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841704</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841856</id>
	<title>Re:"No flight ceiling"</title>
	<author>spidkit</author>
	<datestamp>1264005480000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>2</modscore>
	<htmltext>The reference to max altitude being un-inhibited by thin air due to the powerplant not being combustion based is misleading. The term "service ceiling" is used to define the altitude at which (generally), aircraft will not climb at a rate faster than 100 feet per minute in a sustained climb attitude. This is a factor of air density (and max available power) - which affects both power output of the "engine" if this were a combustion engine, as well as the airfoil, and the lift (and drag) it produces (in a fixed wing craft). If the powerplant is electric, one still contends with air density which as a factor in the lift formula: L = (1/2) d v2 s CL, where

    * L = Lift, which must equal the airplane's weight (and pilot) in pounds
    * d = density of the air. This will change due to altitude. These values can be found in a I.C.A.O. Standard Atmosphere Table.
    * v = velocity of an aircraft expressed in feet per second
    * s = the wing area of an aircraft in square feet
    * CL = Coefficient of lift , which is determined by the type of airfoil and angle of attack.

reference: <a href="http://www.grc.nasa.gov/WWW/K-12/WindTunnel/Activities/lift\_formula.html" title="nasa.gov" rel="nofollow">http://www.grc.nasa.gov/WWW/K-12/WindTunnel/Activities/lift\_formula.html</a> [nasa.gov]

If the air gets too thin - you're lift value will drop, and if it drops out (pilot plus craft weight) before the battery runs down, the craft will cease to climb because of the drop in air density.</htmltext>
<tokenext>The reference to max altitude being un-inhibited by thin air due to the powerplant not being combustion based is misleading .
The term " service ceiling " is used to define the altitude at which ( generally ) , aircraft will not climb at a rate faster than 100 feet per minute in a sustained climb attitude .
This is a factor of air density ( and max available power ) - which affects both power output of the " engine " if this were a combustion engine , as well as the airfoil , and the lift ( and drag ) it produces ( in a fixed wing craft ) .
If the powerplant is electric , one still contends with air density which as a factor in the lift formula : L = ( 1/2 ) d v2 s CL , where * L = Lift , which must equal the airplane 's weight ( and pilot ) in pounds * d = density of the air .
This will change due to altitude .
These values can be found in a I.C.A.O .
Standard Atmosphere Table .
* v = velocity of an aircraft expressed in feet per second * s = the wing area of an aircraft in square feet * CL = Coefficient of lift , which is determined by the type of airfoil and angle of attack .
reference : http : //www.grc.nasa.gov/WWW/K-12/WindTunnel/Activities/lift \ _formula.html [ nasa.gov ] If the air gets too thin - you 're lift value will drop , and if it drops out ( pilot plus craft weight ) before the battery runs down , the craft will cease to climb because of the drop in air density .</tokentext>
<sentencetext>The reference to max altitude being un-inhibited by thin air due to the powerplant not being combustion based is misleading.
The term "service ceiling" is used to define the altitude at which (generally), aircraft will not climb at a rate faster than 100 feet per minute in a sustained climb attitude.
This is a factor of air density (and max available power) - which affects both power output of the "engine" if this were a combustion engine, as well as the airfoil, and the lift (and drag) it produces (in a fixed wing craft).
If the powerplant is electric, one still contends with air density which as a factor in the lift formula: L = (1/2) d v2 s CL, where

    * L = Lift, which must equal the airplane's weight (and pilot) in pounds
    * d = density of the air.
This will change due to altitude.
These values can be found in a I.C.A.O.
Standard Atmosphere Table.
* v = velocity of an aircraft expressed in feet per second
    * s = the wing area of an aircraft in square feet
    * CL = Coefficient of lift , which is determined by the type of airfoil and angle of attack.
reference: http://www.grc.nasa.gov/WWW/K-12/WindTunnel/Activities/lift\_formula.html [nasa.gov]

If the air gets too thin - you're lift value will drop, and if it drops out (pilot plus craft weight) before the battery runs down, the craft will cease to climb because of the drop in air density.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841504</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842510</id>
	<title>fuel cells</title>
	<author>Anonymous</author>
	<datestamp>1264011060000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>fuel cells</p></htmltext>
<tokenext>fuel cells</tokentext>
<sentencetext>fuel cells</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843096</id>
	<title>Re:"No flight ceiling"</title>
	<author>Anonymous</author>
	<datestamp>1264017300000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Flight ceiling is the altitude where a climb rate of 50ft/min can no longer be maintained.</p><p>It could, but when it gets there the battery runs out. That's similar to a range limit.</p></htmltext>
<tokenext>Flight ceiling is the altitude where a climb rate of 50ft/min can no longer be maintained.It could , but when it gets there the battery runs out .
That 's similar to a range limit .</tokentext>
<sentencetext>Flight ceiling is the altitude where a climb rate of 50ft/min can no longer be maintained.It could, but when it gets there the battery runs out.
That's similar to a range limit.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841680</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841982</id>
	<title>Re:  Is Elmer Gantry Available?</title>
	<author>FooAtWFU</author>
	<datestamp>1264006440000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Pilots? Pffffft. Think of the drones!</htmltext>
<tokenext>Pilots ?
Pffffft. Think of the drones !</tokentext>
<sentencetext>Pilots?
Pffffft. Think of the drones!</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841630</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842062</id>
	<title>Re:Go the "Green Spin"</title>
	<author>John Hasler</author>
	<datestamp>1264007160000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>&gt;<nobr> <wbr></nobr>...that nasty lithium stuff...</p><p>There is nothing particularly nasty about lithium.</p></htmltext>
<tokenext>&gt; ...that nasty lithium stuff...There is nothing particularly nasty about lithium .</tokentext>
<sentencetext>&gt; ...that nasty lithium stuff...There is nothing particularly nasty about lithium.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841576</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842188</id>
	<title>Re:CG concept only</title>
	<author>Anonymous</author>
	<datestamp>1264008720000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>the reason you'll *never* see personal transport aircraft is why they've been nothing but a pipe dream anyway...if you can't have trouble free traffic on the ground, would you want the  idiot next door flying over your house during rush hour???</p></htmltext>
<tokenext>the reason you 'll * never * see personal transport aircraft is why they 've been nothing but a pipe dream anyway...if you ca n't have trouble free traffic on the ground , would you want the idiot next door flying over your house during rush hour ? ?
?</tokentext>
<sentencetext>the reason you'll *never* see personal transport aircraft is why they've been nothing but a pipe dream anyway...if you can't have trouble free traffic on the ground, would you want the  idiot next door flying over your house during rush hour??
?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841506</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30856044</id>
	<title>Interesting</title>
	<author>Anonymous</author>
	<datestamp>1264092120000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>This looks a lot like the Convair "Pogo" tail-sitter concept that the USN experimented with in the 1950's.It had major technical difficulties and the project was dropped as unworkable. The prototype only flew tethered and never went through transition from vertical to horizontal flight. This does not look like something that the average person could get into and go like an automobile, probably requiring (at the very least) a helicopter license (I don't think fixed-wing training would cut it).</p><p>It is interesting concept however, I wonder if you added an engine/generator and make it a kind of hybrid with the generator running the electric engines until the fuel was exhausted and then the batteries would take over. Would the extended range be worth the added weight and slight redesign?</p></htmltext>
<tokenext>This looks a lot like the Convair " Pogo " tail-sitter concept that the USN experimented with in the 1950 's.It had major technical difficulties and the project was dropped as unworkable .
The prototype only flew tethered and never went through transition from vertical to horizontal flight .
This does not look like something that the average person could get into and go like an automobile , probably requiring ( at the very least ) a helicopter license ( I do n't think fixed-wing training would cut it ) .It is interesting concept however , I wonder if you added an engine/generator and make it a kind of hybrid with the generator running the electric engines until the fuel was exhausted and then the batteries would take over .
Would the extended range be worth the added weight and slight redesign ?</tokentext>
<sentencetext>This looks a lot like the Convair "Pogo" tail-sitter concept that the USN experimented with in the 1950's.It had major technical difficulties and the project was dropped as unworkable.
The prototype only flew tethered and never went through transition from vertical to horizontal flight.
This does not look like something that the average person could get into and go like an automobile, probably requiring (at the very least) a helicopter license (I don't think fixed-wing training would cut it).It is interesting concept however, I wonder if you added an engine/generator and make it a kind of hybrid with the generator running the electric engines until the fuel was exhausted and then the batteries would take over.
Would the extended range be worth the added weight and slight redesign?</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30845942</id>
	<title>Big planes are more practical</title>
	<author>bjourne</author>
	<datestamp>1264089720000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Can anyone explain why NASA is focusing on a small personal aircraft instead of a jumbo jet? It seems to me that an electric plane that can be used for mass transport would be much more practical, and have a huge market. Practically every airline would want to replace their petroleum dependant aircraft fleet with electrical ones which would be much cheaper to operate. Plus, a jumbo jet would be easier to get efficient, just put a really large battery in it, right.</htmltext>
<tokenext>Can anyone explain why NASA is focusing on a small personal aircraft instead of a jumbo jet ?
It seems to me that an electric plane that can be used for mass transport would be much more practical , and have a huge market .
Practically every airline would want to replace their petroleum dependant aircraft fleet with electrical ones which would be much cheaper to operate .
Plus , a jumbo jet would be easier to get efficient , just put a really large battery in it , right .</tokentext>
<sentencetext>Can anyone explain why NASA is focusing on a small personal aircraft instead of a jumbo jet?
It seems to me that an electric plane that can be used for mass transport would be much more practical, and have a huge market.
Practically every airline would want to replace their petroleum dependant aircraft fleet with electrical ones which would be much cheaper to operate.
Plus, a jumbo jet would be easier to get efficient, just put a really large battery in it, right.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841630</id>
	<title>Is Elmer Gantry Available?</title>
	<author>b4upoo</author>
	<datestamp>1264003080000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>2</modscore>
	<htmltext><p>           I will believe it when I see it. Batteries that good are a dream. And as far as the nearly 30,000 foot ceiling of this device cold and thin air might be a serious issue. Pilots generally like to breath and being turned into a frozen, air starved corpse is not a goal for most of us. Or are we supposed to think this thing with have a closed cabin with oxygen and heat available? Jesus, we can't even get good batteries for electric bicycles yet.</p></htmltext>
<tokenext>I will believe it when I see it .
Batteries that good are a dream .
And as far as the nearly 30,000 foot ceiling of this device cold and thin air might be a serious issue .
Pilots generally like to breath and being turned into a frozen , air starved corpse is not a goal for most of us .
Or are we supposed to think this thing with have a closed cabin with oxygen and heat available ?
Jesus , we ca n't even get good batteries for electric bicycles yet .</tokentext>
<sentencetext>           I will believe it when I see it.
Batteries that good are a dream.
And as far as the nearly 30,000 foot ceiling of this device cold and thin air might be a serious issue.
Pilots generally like to breath and being turned into a frozen, air starved corpse is not a goal for most of us.
Or are we supposed to think this thing with have a closed cabin with oxygen and heat available?
Jesus, we can't even get good batteries for electric bicycles yet.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846730</id>
	<title>Re:One-man!</title>
	<author>MooseTick</author>
	<datestamp>1264093200000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>This has nothing to do with weiners. The DRM in the plane uses a chromosone detector to ensure only men can drive it. I'm not sure how this works out when the man is wearing a lady wig though.</p></htmltext>
<tokenext>This has nothing to do with weiners .
The DRM in the plane uses a chromosone detector to ensure only men can drive it .
I 'm not sure how this works out when the man is wearing a lady wig though .</tokentext>
<sentencetext>This has nothing to do with weiners.
The DRM in the plane uses a chromosone detector to ensure only men can drive it.
I'm not sure how this works out when the man is wearing a lady wig though.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843972</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843670</id>
	<title>Battery powered aircraft</title>
	<author>Make</author>
	<datestamp>1264068420000</datestamp>
	<modclass>Informativ</modclass>
	<modscore>2</modscore>
	<htmltext><p>The Antares 20E made its maiden flight in 2003. It is a self-launching glider with battery powered engine:</p><p><a href="http://www.lange-aviation.com/htm/english/products/antares\_20e/antares\_20E.html" title="lange-aviation.com" rel="nofollow">http://www.lange-aviation.com/htm/english/products/antares\_20e/antares\_20E.html</a> [lange-aviation.com]</p><p>A wonderful glider. Sad it's so expensive (several 100k euros).</p></htmltext>
<tokenext>The Antares 20E made its maiden flight in 2003 .
It is a self-launching glider with battery powered engine : http : //www.lange-aviation.com/htm/english/products/antares \ _20e/antares \ _20E.html [ lange-aviation.com ] A wonderful glider .
Sad it 's so expensive ( several 100k euros ) .</tokentext>
<sentencetext>The Antares 20E made its maiden flight in 2003.
It is a self-launching glider with battery powered engine:http://www.lange-aviation.com/htm/english/products/antares\_20e/antares\_20E.html [lange-aviation.com]A wonderful glider.
Sad it's so expensive (several 100k euros).</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841680</id>
	<title>Re:"No flight ceiling"</title>
	<author>rockNme2349</author>
	<datestamp>1264003500000</datestamp>
	<modclass>Funny</modclass>
	<modscore>4</modscore>
	<htmltext><p>That was my personal favorite quote.</p><p><div class="quote"><p>It has no flight ceiling... so it could go up to about 9,150 meters</p></div></div>
	</htmltext>
<tokenext>That was my personal favorite quote.It has no flight ceiling... so it could go up to about 9,150 meters</tokentext>
<sentencetext>That was my personal favorite quote.It has no flight ceiling... so it could go up to about 9,150 meters
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841504</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846020</id>
	<title>Stealth vs. rotors; rotary-wing vs. fixed-wing</title>
	<author>phyzz</author>
	<datestamp>1264090020000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>I fail to see how this aircraft would be stealthy, even being built with composite material. The huge propellers would shine like hell on a Doppler radar's scope.</p><p>Furthermore several two-place fully electric aircraft exists already, they are certified as Light Sports Aircraft, and so have by nature VSTOL capacity by nature...</p><p>People tend to forget that the only advantage of the helicopter (or any powered rotary-wing aircraft, excluding autogyros) is the capacity to hover. In all other cases, fixed-wing aircraft are superior in speed, endurance, range, safety, etc. (trade-offs being made to allow either low stall speeds or high dash speeds or high operational altitude or heavy cargo capacity or oversized cargo capacity or CowboyNeal transportation...) You could land some VSTOL aircraft in half a football field, and take off with some restrictions.</p></htmltext>
<tokenext>I fail to see how this aircraft would be stealthy , even being built with composite material .
The huge propellers would shine like hell on a Doppler radar 's scope.Furthermore several two-place fully electric aircraft exists already , they are certified as Light Sports Aircraft , and so have by nature VSTOL capacity by nature...People tend to forget that the only advantage of the helicopter ( or any powered rotary-wing aircraft , excluding autogyros ) is the capacity to hover .
In all other cases , fixed-wing aircraft are superior in speed , endurance , range , safety , etc .
( trade-offs being made to allow either low stall speeds or high dash speeds or high operational altitude or heavy cargo capacity or oversized cargo capacity or CowboyNeal transportation... ) You could land some VSTOL aircraft in half a football field , and take off with some restrictions .</tokentext>
<sentencetext>I fail to see how this aircraft would be stealthy, even being built with composite material.
The huge propellers would shine like hell on a Doppler radar's scope.Furthermore several two-place fully electric aircraft exists already, they are certified as Light Sports Aircraft, and so have by nature VSTOL capacity by nature...People tend to forget that the only advantage of the helicopter (or any powered rotary-wing aircraft, excluding autogyros) is the capacity to hover.
In all other cases, fixed-wing aircraft are superior in speed, endurance, range, safety, etc.
(trade-offs being made to allow either low stall speeds or high dash speeds or high operational altitude or heavy cargo capacity or oversized cargo capacity or CowboyNeal transportation...) You could land some VSTOL aircraft in half a football field, and take off with some restrictions.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843020</id>
	<title>i'm still waiting on my jet pack</title>
	<author>sneakyimp</author>
	<datestamp>1264016220000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>i'm still waiting on my first jet pack and this article is trying to tell me jet pack is obsolete.  what a bummer.  to be honest, i'm imagining this vehicle will result in a lot of strained necks.  it looks very uncomfortable.</p></htmltext>
<tokenext>i 'm still waiting on my first jet pack and this article is trying to tell me jet pack is obsolete .
what a bummer .
to be honest , i 'm imagining this vehicle will result in a lot of strained necks .
it looks very uncomfortable .</tokentext>
<sentencetext>i'm still waiting on my first jet pack and this article is trying to tell me jet pack is obsolete.
what a bummer.
to be honest, i'm imagining this vehicle will result in a lot of strained necks.
it looks very uncomfortable.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841602</id>
	<title>Cool toy, but we can't have it.</title>
	<author>Anonymous</author>
	<datestamp>1264002720000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>2</modscore>
	<htmltext>The U.S. government will <i>never</i> allow widespread use of such a craft. The FAA is trying to essentially eliminate community airfields with their regulations and "anti-terrorist" programs. While I'd <i>love</i> to be able to fly to work, it's just not.going.to.happen.</htmltext>
<tokenext>The U.S. government will never allow widespread use of such a craft .
The FAA is trying to essentially eliminate community airfields with their regulations and " anti-terrorist " programs .
While I 'd love to be able to fly to work , it 's just not.going.to.happen .</tokentext>
<sentencetext>The U.S. government will never allow widespread use of such a craft.
The FAA is trying to essentially eliminate community airfields with their regulations and "anti-terrorist" programs.
While I'd love to be able to fly to work, it's just not.going.to.happen.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841706</id>
	<title>Still only 20 minutes</title>
	<author>Anonymous</author>
	<datestamp>1264003740000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>n principle, the Puffin can cruise at 240 kilometers per hour and dash at more than 480 kph.</p> </div><p><div class="quote"><p>With current state-of-the-art batteries, it has a range of just 80 kilometers if cruising,</p></div><p>That's a flight time of (80km/(480km/hr)) = 20 minutes. Less than impressive even if they actually were to produce it.</p><p>Although that is a problem they seem to have solved by making it with batteries which don't exist yet.</p></div>
	</htmltext>
<tokenext>n principle , the Puffin can cruise at 240 kilometers per hour and dash at more than 480 kph .
With current state-of-the-art batteries , it has a range of just 80 kilometers if cruising,That 's a flight time of ( 80km/ ( 480km/hr ) ) = 20 minutes .
Less than impressive even if they actually were to produce it.Although that is a problem they seem to have solved by making it with batteries which do n't exist yet .</tokentext>
<sentencetext>n principle, the Puffin can cruise at 240 kilometers per hour and dash at more than 480 kph.
With current state-of-the-art batteries, it has a range of just 80 kilometers if cruising,That's a flight time of (80km/(480km/hr)) = 20 minutes.
Less than impressive even if they actually were to produce it.Although that is a problem they seem to have solved by making it with batteries which don't exist yet.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841506</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842878</id>
	<title>Raven*s*</title>
	<author>xant</author>
	<datestamp>1264014540000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Huginn and Muninn.  I assume they're saving that for some sort of autonomous flying robot system that uses a pair of them to confuse enemy anti-autonomous-aircraft systems.</p></htmltext>
<tokenext>Huginn and Muninn .
I assume they 're saving that for some sort of autonomous flying robot system that uses a pair of them to confuse enemy anti-autonomous-aircraft systems .</tokentext>
<sentencetext>Huginn and Muninn.
I assume they're saving that for some sort of autonomous flying robot system that uses a pair of them to confuse enemy anti-autonomous-aircraft systems.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841660</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841760</id>
	<title>Innumeracy?</title>
	<author>gyrogeerloose</author>
	<datestamp>1264004340000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>2</modscore>
	<htmltext><p>From TFA:</p><p><div class="quote"><p>electric aircraft are much quieter than regular planes&mdash;at some 150 meters, it is as loud as 50 decibels, or roughly the volume of a conversation, making it roughly 10 times quieter than current low-noise helicopters.</p></div><p>I admit that I never have gotten a handle on math beyond algebra but am I wrong by being bothered by statements like <i>10 times quieter</i>? Wouldn't be better to say "makes only one-tenth the noise?" Or am I being pedantic?</p></div>
	</htmltext>
<tokenext>From TFA : electric aircraft are much quieter than regular planes    at some 150 meters , it is as loud as 50 decibels , or roughly the volume of a conversation , making it roughly 10 times quieter than current low-noise helicopters.I admit that I never have gotten a handle on math beyond algebra but am I wrong by being bothered by statements like 10 times quieter ?
Would n't be better to say " makes only one-tenth the noise ?
" Or am I being pedantic ?</tokentext>
<sentencetext>From TFA:electric aircraft are much quieter than regular planes—at some 150 meters, it is as loud as 50 decibels, or roughly the volume of a conversation, making it roughly 10 times quieter than current low-noise helicopters.I admit that I never have gotten a handle on math beyond algebra but am I wrong by being bothered by statements like 10 times quieter?
Wouldn't be better to say "makes only one-tenth the noise?
" Or am I being pedantic?
	</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846402</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>Anonymous</author>
	<datestamp>1264091640000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>This isn't completely true. Electric motors have a much higher power to weight ratio then any reciprocating engine and can easily exceed 70\% efficiency. These two factors allow electric powertrains to be quite competitive in some circumstances.</p></htmltext>
<tokenext>This is n't completely true .
Electric motors have a much higher power to weight ratio then any reciprocating engine and can easily exceed 70 \ % efficiency .
These two factors allow electric powertrains to be quite competitive in some circumstances .</tokentext>
<sentencetext>This isn't completely true.
Electric motors have a much higher power to weight ratio then any reciprocating engine and can easily exceed 70\% efficiency.
These two factors allow electric powertrains to be quite competitive in some circumstances.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841504</id>
	<title>"No flight ceiling"</title>
	<author>Anonymous</author>
	<datestamp>1264002120000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>5</modscore>
	<htmltext>"since the engine is electric it has no flight ceiling and can fly up to 9,150 meters high, uninhibited by thin air." I presume they mean in this context no substantial flight ceiling where the engine gives out from lack of oxygen and you have a very bad day. That's backed up by the original article which says that "It has no flight ceiling--it is not air-breathing like gas engines are, and thus is not limited by thin air--so it could go up to about 9,150 meters before its energy runs low enough to drive it to descend." So in fact you could fly this much higher than 9,150 meters if you started out high up (from say a larger aircraft) or had a parachute. This leads to a question: How high up could it go before the air becomes too thin to generate enough lift to continue ascending?</htmltext>
<tokenext>" since the engine is electric it has no flight ceiling and can fly up to 9,150 meters high , uninhibited by thin air .
" I presume they mean in this context no substantial flight ceiling where the engine gives out from lack of oxygen and you have a very bad day .
That 's backed up by the original article which says that " It has no flight ceiling--it is not air-breathing like gas engines are , and thus is not limited by thin air--so it could go up to about 9,150 meters before its energy runs low enough to drive it to descend .
" So in fact you could fly this much higher than 9,150 meters if you started out high up ( from say a larger aircraft ) or had a parachute .
This leads to a question : How high up could it go before the air becomes too thin to generate enough lift to continue ascending ?</tokentext>
<sentencetext>"since the engine is electric it has no flight ceiling and can fly up to 9,150 meters high, uninhibited by thin air.
" I presume they mean in this context no substantial flight ceiling where the engine gives out from lack of oxygen and you have a very bad day.
That's backed up by the original article which says that "It has no flight ceiling--it is not air-breathing like gas engines are, and thus is not limited by thin air--so it could go up to about 9,150 meters before its energy runs low enough to drive it to descend.
" So in fact you could fly this much higher than 9,150 meters if you started out high up (from say a larger aircraft) or had a parachute.
This leads to a question: How high up could it go before the air becomes too thin to generate enough lift to continue ascending?</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841850</id>
	<title>If it had a frikkin' laser...</title>
	<author>UttBuggly</author>
	<datestamp>1264005480000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>...I'd buy THAT for a dollar!</p><p>Actually, if this thing ever becomes an actual product, I'll buy one.</p><p>I can always get the laser in the aftermarket.</p></htmltext>
<tokenext>...I 'd buy THAT for a dollar ! Actually , if this thing ever becomes an actual product , I 'll buy one.I can always get the laser in the aftermarket .</tokentext>
<sentencetext>...I'd buy THAT for a dollar!Actually, if this thing ever becomes an actual product, I'll buy one.I can always get the laser in the aftermarket.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844546</id>
	<title>Re:Go the "Green Spin"</title>
	<author>kievit</author>
	<datestamp>1264080180000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Another "green" issue is that while a puffin may consume less power than a propellor plane powered by a combustion engine, flight is still less energy-efficient than transport by wheels (train, car, bike). As far as I know currently only a tiny fraction of electric power worldwide is generated with environmentally friendly techniques. So I'd like to see the kWh scores compared between a puffin and an electric car.</p></htmltext>
<tokenext>Another " green " issue is that while a puffin may consume less power than a propellor plane powered by a combustion engine , flight is still less energy-efficient than transport by wheels ( train , car , bike ) .
As far as I know currently only a tiny fraction of electric power worldwide is generated with environmentally friendly techniques .
So I 'd like to see the kWh scores compared between a puffin and an electric car .</tokentext>
<sentencetext>Another "green" issue is that while a puffin may consume less power than a propellor plane powered by a combustion engine, flight is still less energy-efficient than transport by wheels (train, car, bike).
As far as I know currently only a tiny fraction of electric power worldwide is generated with environmentally friendly techniques.
So I'd like to see the kWh scores compared between a puffin and an electric car.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841576</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841578</id>
	<title>when i can buy one at walmart</title>
	<author>Anonymous</author>
	<datestamp>1264002600000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>that's the acid test. until then, i refuse to believe it exists.</htmltext>
<tokenext>that 's the acid test .
until then , i refuse to believe it exists .</tokentext>
<sentencetext>that's the acid test.
until then, i refuse to believe it exists.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841864</id>
	<title>A Tail Sitter?</title>
	<author>westlake</author>
	<datestamp>1264005540000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Tail sitters like the <a href="https://www.fiddlersgreen.net/models/aircraft/Convair-Pogo.htmlConvair" title="fiddlersgreen.net">Convair Pogo</a> [fiddlersgreen.net] were a beast to land.</p><p>The transition from horizontal to vertical flight has always come with substantial penalties - weight, complexity, power, control and cost.</p><p>There's some truth still to old adage that what "looks right, flies right." To my eyes this thing looks all wrong.</p></htmltext>
<tokenext>Tail sitters like the Convair Pogo [ fiddlersgreen.net ] were a beast to land.The transition from horizontal to vertical flight has always come with substantial penalties - weight , complexity , power , control and cost.There 's some truth still to old adage that what " looks right , flies right .
" To my eyes this thing looks all wrong .</tokentext>
<sentencetext>Tail sitters like the Convair Pogo [fiddlersgreen.net] were a beast to land.The transition from horizontal to vertical flight has always come with substantial penalties - weight, complexity, power, control and cost.There's some truth still to old adage that what "looks right, flies right.
" To my eyes this thing looks all wrong.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30845338</id>
	<title>Re:Innumeracy?</title>
	<author>Anonymous</author>
	<datestamp>1264086900000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>The article is right. The decibel scale is logarithmic, that means that X+3Db is double the value of X.</p><p>So, 10 times more than 50 decibel is 80 decibel, that's (to my knowledge) a pretty reasonable sound level for a standard helicopter taking off.</p><p>regards</p></htmltext>
<tokenext>The article is right .
The decibel scale is logarithmic , that means that X + 3Db is double the value of X.So , 10 times more than 50 decibel is 80 decibel , that 's ( to my knowledge ) a pretty reasonable sound level for a standard helicopter taking off.regards</tokentext>
<sentencetext>The article is right.
The decibel scale is logarithmic, that means that X+3Db is double the value of X.So, 10 times more than 50 decibel is 80 decibel, that's (to my knowledge) a pretty reasonable sound level for a standard helicopter taking off.regards</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841760</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843094</id>
	<title>Re:And part of the project is named Icarus?</title>
	<author>evilviper</author>
	<datestamp>1264017300000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><blockquote><div><p>I can't tell if such program names are deliberately humorous</p></div></blockquote><p>No, YOU are simply focusing on the wrong part of the story...</p><blockquote><div><p>But would it hurt if occasionally a program was named after Horus or after Odin's raven?</p></div></blockquote><p>How many people would recognize the reference?  Far fewer, I'd say.</p></div>
	</htmltext>
<tokenext>I ca n't tell if such program names are deliberately humorousNo , YOU are simply focusing on the wrong part of the story...But would it hurt if occasionally a program was named after Horus or after Odin 's raven ? How many people would recognize the reference ?
Far fewer , I 'd say .</tokentext>
<sentencetext>I can't tell if such program names are deliberately humorousNo, YOU are simply focusing on the wrong part of the story...But would it hurt if occasionally a program was named after Horus or after Odin's raven?How many people would recognize the reference?
Far fewer, I'd say.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841660</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841530</id>
	<title>My question is..</title>
	<author>cyberzephyr</author>
	<datestamp>1264002240000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>How long will this stay in the air?</p><p>  Jet packs last about 90 seconds?  Hmmm</p></htmltext>
<tokenext>How long will this stay in the air ?
Jet packs last about 90 seconds ?
Hmmm</tokentext>
<sentencetext>How long will this stay in the air?
Jet packs last about 90 seconds?
Hmmm</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841676</id>
	<title>Not a good sign</title>
	<author>Anonymous</author>
	<datestamp>1264003500000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>The dude in the simulation has no nuts. Flight accident? Count me out.<br>
&nbsp;</p></htmltext>
<tokenext>The dude in the simulation has no nuts .
Flight accident ?
Count me out .
 </tokentext>
<sentencetext>The dude in the simulation has no nuts.
Flight accident?
Count me out.
 </sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842634</id>
	<title>Re:And part of the project is named Icarus?</title>
	<author>jamesh</author>
	<datestamp>1264012080000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>Let's try to see if we can get them to test out a project named after a flightless bird.</p></div><p>There is an ISP in Australia called 'Dodo', and their most commonly used marketing statement is 'Internet that flies'. I thought that was kind of clever given that the Dodo is flightless, and extinct.</p></div>
	</htmltext>
<tokenext>Let 's try to see if we can get them to test out a project named after a flightless bird.There is an ISP in Australia called 'Dodo ' , and their most commonly used marketing statement is 'Internet that flies' .
I thought that was kind of clever given that the Dodo is flightless , and extinct .</tokentext>
<sentencetext>Let's try to see if we can get them to test out a project named after a flightless bird.There is an ISP in Australia called 'Dodo', and their most commonly used marketing statement is 'Internet that flies'.
I thought that was kind of clever given that the Dodo is flightless, and extinct.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841660</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841980</id>
	<title>Japan got it first</title>
	<author>gmuslera</author>
	<datestamp>1264006440000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>This <a href="http://www.crunchgear.com/2010/01/19/video-prototype-jettupakku/" title="crunchgear.com">prototype</a> [crunchgear.com] really show how high we can get with personal flight vehicles.</htmltext>
<tokenext>This prototype [ crunchgear.com ] really show how high we can get with personal flight vehicles .</tokentext>
<sentencetext>This prototype [crunchgear.com] really show how high we can get with personal flight vehicles.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842152</id>
	<title>Re:Go the "Green Spin"</title>
	<author>Idiomatick</author>
	<datestamp>1264008240000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Lithium batteries are recyclable.... Also I imagine it'll force you to land before it runs out, unless you mean the batteries falling out of the vehicle or something.... Then yeah that'd be a problem.</htmltext>
<tokenext>Lithium batteries are recyclable.... Also I imagine it 'll force you to land before it runs out , unless you mean the batteries falling out of the vehicle or something.... Then yeah that 'd be a problem .</tokentext>
<sentencetext>Lithium batteries are recyclable.... Also I imagine it'll force you to land before it runs out, unless you mean the batteries falling out of the vehicle or something.... Then yeah that'd be a problem.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841576</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841844</id>
	<title>Poor design of tail</title>
	<author>ctmurray</author>
	<datestamp>1264005420000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>I think it is a poor design to have the plane "stand" on its tail. The picture shows the tail is "split" so it can help hold  the plane in the upright position. Seems like this is ripe for damage to the tail and that can't be a good thing.</htmltext>
<tokenext>I think it is a poor design to have the plane " stand " on its tail .
The picture shows the tail is " split " so it can help hold the plane in the upright position .
Seems like this is ripe for damage to the tail and that ca n't be a good thing .</tokentext>
<sentencetext>I think it is a poor design to have the plane "stand" on its tail.
The picture shows the tail is "split" so it can help hold  the plane in the upright position.
Seems like this is ripe for damage to the tail and that can't be a good thing.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841620</id>
	<title>Been there, done that</title>
	<author>arcsimm</author>
	<datestamp>1264002960000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>2</modscore>
	<htmltext>Somewhere in Switzerland,  Yves Rossy is wondering what took NASA so long.</htmltext>
<tokenext>Somewhere in Switzerland , Yves Rossy is wondering what took NASA so long .</tokentext>
<sentencetext>Somewhere in Switzerland,  Yves Rossy is wondering what took NASA so long.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844292</id>
	<title>Re:Useless precision in ceiling</title>
	<author>fnj</author>
	<datestamp>1264077000000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Ha.  This is a pet peeve of mine.  Useless and false precision.  I am surprised they didn't say 9144.0 m (30,000 ft).  Mind you, it will never make it to 9144.01 m.</p></htmltext>
<tokenext>Ha .
This is a pet peeve of mine .
Useless and false precision .
I am surprised they did n't say 9144.0 m ( 30,000 ft ) .
Mind you , it will never make it to 9144.01 m .</tokentext>
<sentencetext>Ha.
This is a pet peeve of mine.
Useless and false precision.
I am surprised they didn't say 9144.0 m (30,000 ft).
Mind you, it will never make it to 9144.01 m.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841766</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843138</id>
	<title>Re:"No flight ceiling"</title>
	<author>StarsAreAlsoFire</author>
	<datestamp>1264104540000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>2</modscore>
	<htmltext>Speed of sound is related to temperature ONLY. It is for this reason (ultimately) that turbo-props are most efficient for short flights, and turbofan for long flights.<br><br>Most of a ~200 mile commercial flight is spent ascending and descending. Not so much time spent at cruising altitude. Props are significantly more efficient at low altitudes, compared to turbofans. Recall that we are talking about turbine engines in both cases! The 'burn fuel in air' part of the engine is *exactly* the same. The efficiency comes down to the type of blades you're spinning - a few very long unenclosed blades work great -- right up until you have to spin the blades so fast that the Mach-effects of one blade start interfering with the air around the next blade. The fan in the turbofan uses a bunch of smaller blades designed to avoid Mach-effects of this nature. So when those effects start to come into play you see the efficiency of turbofans stay the same (basically) while the efficiency (and eventually capability, if you keep climbing) of the turboprop plummets.<br><br>Of course there's all sorts of craziness regarding gear ratios and a bazillion other things that I completely ignored here. But as a high level overview, it's not worthless.<br><br>If you can do VTOL, you design for sea level -- a huge portion of your fuel/energy tends to go into getting you up and down. So how high can you CRUISE on a prop designed for optimal performance at sea level? At a guess, closer to 5km/12k feet than to 10km/33K feet, driven by the weight-cost of pressurizing the beast. But there are a bunch of variables:<br><br>- What speed do you want to cruise at?<br>- What is your range? Is it WORTH getting to 30k (40k, 50k, 12k) feet, only to start descending as soon as you do?<br>- How much can you feather your prop blades? (Change their pitch, letting you spin the blade faster at high altitudes while decreasing blade turbulence)<br>- What is your L/D? (Lift to drag ratio) At sea-level, your optimal speed may be 200mph. At 30K feet you have to go 300mph for the same amount of lift. Lift to drag ratio tells you that the amount of energy required to overcome that induced drag is the same for 200 mph and sea level as it is for 300mph and 30K feet.<br>(But that doesn't take prop drag into account. If your prop flies apart because you have to turn it at 20K rpm to stay in the air at 30K feet, all bets are off.)<br>- more and more, and weather, and a lot about temperature, and how much does it cost to pressurize the cabin, etc).<br><br>As for ultimate limits, the difference between stalling and breaking the sound barrier was about 50 knots for the U2 flights. That may have been plus or minus 50', but I think it was actually +/-25. Memory fails. Anyway, 68K feet is a *seriously* nerve-wracking place to fly if your airplane can't do Mach.<br><br>The F-15 managed a zoom-climb 'somewhere in the region of' 70K (I've seen 80k cited) feet. That is 'go as fast as you can at the highest altitude that your engines stay lit, and then dive, to go even faster. Then, at a very exact point determined by guys with slide rules, kick on the after-burners and start climbing at a particular angle. Then your engines burn out, then you coast. If you are in the united states and flying an F15, you launch a missile that destroys a satellite. Then plummet back to earth completely out of control, because there is no air going across your control surfaces. And hope you don't enter at the wrong angle, because there are ways you can come back to earth which would preclude you re-lighting your engines in time to save the plane. Nobody WANTS to eject.'</htmltext>
<tokenext>Speed of sound is related to temperature ONLY .
It is for this reason ( ultimately ) that turbo-props are most efficient for short flights , and turbofan for long flights.Most of a ~ 200 mile commercial flight is spent ascending and descending .
Not so much time spent at cruising altitude .
Props are significantly more efficient at low altitudes , compared to turbofans .
Recall that we are talking about turbine engines in both cases !
The 'burn fuel in air ' part of the engine is * exactly * the same .
The efficiency comes down to the type of blades you 're spinning - a few very long unenclosed blades work great -- right up until you have to spin the blades so fast that the Mach-effects of one blade start interfering with the air around the next blade .
The fan in the turbofan uses a bunch of smaller blades designed to avoid Mach-effects of this nature .
So when those effects start to come into play you see the efficiency of turbofans stay the same ( basically ) while the efficiency ( and eventually capability , if you keep climbing ) of the turboprop plummets.Of course there 's all sorts of craziness regarding gear ratios and a bazillion other things that I completely ignored here .
But as a high level overview , it 's not worthless.If you can do VTOL , you design for sea level -- a huge portion of your fuel/energy tends to go into getting you up and down .
So how high can you CRUISE on a prop designed for optimal performance at sea level ?
At a guess , closer to 5km/12k feet than to 10km/33K feet , driven by the weight-cost of pressurizing the beast .
But there are a bunch of variables : - What speed do you want to cruise at ? - What is your range ?
Is it WORTH getting to 30k ( 40k , 50k , 12k ) feet , only to start descending as soon as you do ? - How much can you feather your prop blades ?
( Change their pitch , letting you spin the blade faster at high altitudes while decreasing blade turbulence ) - What is your L/D ?
( Lift to drag ratio ) At sea-level , your optimal speed may be 200mph .
At 30K feet you have to go 300mph for the same amount of lift .
Lift to drag ratio tells you that the amount of energy required to overcome that induced drag is the same for 200 mph and sea level as it is for 300mph and 30K feet .
( But that does n't take prop drag into account .
If your prop flies apart because you have to turn it at 20K rpm to stay in the air at 30K feet , all bets are off .
) - more and more , and weather , and a lot about temperature , and how much does it cost to pressurize the cabin , etc ) .As for ultimate limits , the difference between stalling and breaking the sound barrier was about 50 knots for the U2 flights .
That may have been plus or minus 50 ' , but I think it was actually + /-25 .
Memory fails .
Anyway , 68K feet is a * seriously * nerve-wracking place to fly if your airplane ca n't do Mach.The F-15 managed a zoom-climb 'somewhere in the region of ' 70K ( I 've seen 80k cited ) feet .
That is 'go as fast as you can at the highest altitude that your engines stay lit , and then dive , to go even faster .
Then , at a very exact point determined by guys with slide rules , kick on the after-burners and start climbing at a particular angle .
Then your engines burn out , then you coast .
If you are in the united states and flying an F15 , you launch a missile that destroys a satellite .
Then plummet back to earth completely out of control , because there is no air going across your control surfaces .
And hope you do n't enter at the wrong angle , because there are ways you can come back to earth which would preclude you re-lighting your engines in time to save the plane .
Nobody WANTS to eject .
'</tokentext>
<sentencetext>Speed of sound is related to temperature ONLY.
It is for this reason (ultimately) that turbo-props are most efficient for short flights, and turbofan for long flights.Most of a ~200 mile commercial flight is spent ascending and descending.
Not so much time spent at cruising altitude.
Props are significantly more efficient at low altitudes, compared to turbofans.
Recall that we are talking about turbine engines in both cases!
The 'burn fuel in air' part of the engine is *exactly* the same.
The efficiency comes down to the type of blades you're spinning - a few very long unenclosed blades work great -- right up until you have to spin the blades so fast that the Mach-effects of one blade start interfering with the air around the next blade.
The fan in the turbofan uses a bunch of smaller blades designed to avoid Mach-effects of this nature.
So when those effects start to come into play you see the efficiency of turbofans stay the same (basically) while the efficiency (and eventually capability, if you keep climbing) of the turboprop plummets.Of course there's all sorts of craziness regarding gear ratios and a bazillion other things that I completely ignored here.
But as a high level overview, it's not worthless.If you can do VTOL, you design for sea level -- a huge portion of your fuel/energy tends to go into getting you up and down.
So how high can you CRUISE on a prop designed for optimal performance at sea level?
At a guess, closer to 5km/12k feet than to 10km/33K feet, driven by the weight-cost of pressurizing the beast.
But there are a bunch of variables:- What speed do you want to cruise at?- What is your range?
Is it WORTH getting to 30k (40k, 50k, 12k) feet, only to start descending as soon as you do?- How much can you feather your prop blades?
(Change their pitch, letting you spin the blade faster at high altitudes while decreasing blade turbulence)- What is your L/D?
(Lift to drag ratio) At sea-level, your optimal speed may be 200mph.
At 30K feet you have to go 300mph for the same amount of lift.
Lift to drag ratio tells you that the amount of energy required to overcome that induced drag is the same for 200 mph and sea level as it is for 300mph and 30K feet.
(But that doesn't take prop drag into account.
If your prop flies apart because you have to turn it at 20K rpm to stay in the air at 30K feet, all bets are off.
)- more and more, and weather, and a lot about temperature, and how much does it cost to pressurize the cabin, etc).As for ultimate limits, the difference between stalling and breaking the sound barrier was about 50 knots for the U2 flights.
That may have been plus or minus 50', but I think it was actually +/-25.
Memory fails.
Anyway, 68K feet is a *seriously* nerve-wracking place to fly if your airplane can't do Mach.The F-15 managed a zoom-climb 'somewhere in the region of' 70K (I've seen 80k cited) feet.
That is 'go as fast as you can at the highest altitude that your engines stay lit, and then dive, to go even faster.
Then, at a very exact point determined by guys with slide rules, kick on the after-burners and start climbing at a particular angle.
Then your engines burn out, then you coast.
If you are in the united states and flying an F15, you launch a missile that destroys a satellite.
Then plummet back to earth completely out of control, because there is no air going across your control surfaces.
And hope you don't enter at the wrong angle, because there are ways you can come back to earth which would preclude you re-lighting your engines in time to save the plane.
Nobody WANTS to eject.
'</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841504</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842162</id>
	<title>Re:  Is Elmer Gantry Available?</title>
	<author>Idiomatick</author>
	<datestamp>1264008360000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Don't fly it that high?<nobr> <wbr></nobr>... I know everyone on<nobr> <wbr></nobr>/. thinks they are ironman or something but seriously it probably isn't a good idea.</htmltext>
<tokenext>Do n't fly it that high ?
... I know everyone on / .
thinks they are ironman or something but seriously it probably is n't a good idea .</tokentext>
<sentencetext>Don't fly it that high?
... I know everyone on /.
thinks they are ironman or something but seriously it probably isn't a good idea.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841630</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843060</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>evilviper</author>
	<datestamp>1264016940000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>From TFA:</p><blockquote><div><p>This design relies on electric motors. These remain efficient regardless of their size, whereas internal combustion engines become less efficient the smaller they are. As such, electric aircraft can use small motors while generating impressive propulsion--the Puffin can lift a person with just 60 horsepower.</p><p>At up to 95 percent efficiency, electric motors are far more efficient than internal combustion engines, which only rate some 18 to 23 percent.</p></div></blockquote></div>
	</htmltext>
<tokenext>From TFA : This design relies on electric motors .
These remain efficient regardless of their size , whereas internal combustion engines become less efficient the smaller they are .
As such , electric aircraft can use small motors while generating impressive propulsion--the Puffin can lift a person with just 60 horsepower.At up to 95 percent efficiency , electric motors are far more efficient than internal combustion engines , which only rate some 18 to 23 percent .</tokentext>
<sentencetext>From TFA:This design relies on electric motors.
These remain efficient regardless of their size, whereas internal combustion engines become less efficient the smaller they are.
As such, electric aircraft can use small motors while generating impressive propulsion--the Puffin can lift a person with just 60 horsepower.At up to 95 percent efficiency, electric motors are far more efficient than internal combustion engines, which only rate some 18 to 23 percent.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843624</id>
	<title>Re:"No flight ceiling"</title>
	<author>Anonymous</author>
	<datestamp>1264067760000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Remember not to go too close to the sun, your wings just might melt.</p></htmltext>
<tokenext>Remember not to go too close to the sun , your wings just might melt .</tokentext>
<sentencetext>Remember not to go too close to the sun, your wings just might melt.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841680</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842228</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>j\_cavera</author>
	<datestamp>1264009020000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Not unrealistic!  There are a number of battery powered aircraft (that even hold people!) being manufactured today.  Still kinda experimental, but getting much better.  For starters, check out:<p>http://www.yuneec.com/
<br>http://www.electraflyer.com/
<br>http://www.pipistrel.si/planes/35

</p><p>Yes, the energy density of the best batteries are about 5\% that of gasoline (not 1\%) but a gasoline engine is only about 20\% efficient at converting chemical energy to mechanical.  An electric motor is more like 90\%.  It's no where near equal, but definitely usable.</p></htmltext>
<tokenext>Not unrealistic !
There are a number of battery powered aircraft ( that even hold people !
) being manufactured today .
Still kinda experimental , but getting much better .
For starters , check out : http : //www.yuneec.com/ http : //www.electraflyer.com/ http : //www.pipistrel.si/planes/35 Yes , the energy density of the best batteries are about 5 \ % that of gasoline ( not 1 \ % ) but a gasoline engine is only about 20 \ % efficient at converting chemical energy to mechanical .
An electric motor is more like 90 \ % .
It 's no where near equal , but definitely usable .</tokentext>
<sentencetext>Not unrealistic!
There are a number of battery powered aircraft (that even hold people!
) being manufactured today.
Still kinda experimental, but getting much better.
For starters, check out:http://www.yuneec.com/
http://www.electraflyer.com/
http://www.pipistrel.si/planes/35

Yes, the energy density of the best batteries are about 5\% that of gasoline (not 1\%) but a gasoline engine is only about 20\% efficient at converting chemical energy to mechanical.
An electric motor is more like 90\%.
It's no where near equal, but definitely usable.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841526</id>
	<title>psst, NASA, just one little thing.</title>
	<author>Anonymous</author>
	<datestamp>1264002240000</datestamp>
	<modclass>Funny</modclass>
	<modscore>5</modscore>
	<htmltext>Those little bars on the display that shows the charge remaining? Don't trust it. It does not work.</htmltext>
<tokenext>Those little bars on the display that shows the charge remaining ?
Do n't trust it .
It does not work .</tokentext>
<sentencetext>Those little bars on the display that shows the charge remaining?
Don't trust it.
It does not work.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846200</id>
	<title>Re:CG concept only</title>
	<author>Chelloveck</author>
	<datestamp>1264090800000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Yeah, at this point it seems to be just another one of the "Flying cars! Personal jet packs! Real Soon Now!" announcements we've been seeing for the past 50 or 60 years. Let me know when they're in production. I'm not going to hold my breath.</htmltext>
<tokenext>Yeah , at this point it seems to be just another one of the " Flying cars !
Personal jet packs !
Real Soon Now !
" announcements we 've been seeing for the past 50 or 60 years .
Let me know when they 're in production .
I 'm not going to hold my breath .</tokentext>
<sentencetext>Yeah, at this point it seems to be just another one of the "Flying cars!
Personal jet packs!
Real Soon Now!
" announcements we've been seeing for the past 50 or 60 years.
Let me know when they're in production.
I'm not going to hold my breath.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841506</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842658</id>
	<title>Re:when i can buy one at walmart</title>
	<author>Anonymous</author>
	<datestamp>1264012380000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Then cars and planes don't exist. I don't see them at Walmart either<nobr> <wbr></nobr>:/</p></htmltext>
<tokenext>Then cars and planes do n't exist .
I do n't see them at Walmart either : /</tokentext>
<sentencetext>Then cars and planes don't exist.
I don't see them at Walmart either :/</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841578</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841704</id>
	<title>Uncle</title>
	<author>The Yuckinator</author>
	<datestamp>1264003740000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Seriously, it would be a hell of a lot of fun, and probably a challenge to learn to fly as competently as a good driver drives a car.</p><p>But the day they open a dealership in Toronto is the day I stop driving.  Not that pedestrians are all that safe in this city these days, but I'm already concerned enough with a significant portion of the other people on the road.  No way I'm going to share airspace with them too!</p></htmltext>
<tokenext>Seriously , it would be a hell of a lot of fun , and probably a challenge to learn to fly as competently as a good driver drives a car.But the day they open a dealership in Toronto is the day I stop driving .
Not that pedestrians are all that safe in this city these days , but I 'm already concerned enough with a significant portion of the other people on the road .
No way I 'm going to share airspace with them too !</tokentext>
<sentencetext>Seriously, it would be a hell of a lot of fun, and probably a challenge to learn to fly as competently as a good driver drives a car.But the day they open a dealership in Toronto is the day I stop driving.
Not that pedestrians are all that safe in this city these days, but I'm already concerned enough with a significant portion of the other people on the road.
No way I'm going to share airspace with them too!</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843972</id>
	<title>One-man!</title>
	<author>Anonymous</author>
	<datestamp>1264072740000</datestamp>
	<modclass>Troll</modclass>
	<modscore>0</modscore>
	<htmltext><i>The Puffin is an all-electric one-man airplane </i>
<p>
So are only men allowed to fly them? Or does the technology require the pilot insert a weiner into something to get it to work; thus making it impossibly to fly for those who are weinerless.
</p><p>
- Catmeat (weinerless hang-glider pilot)</p></htmltext>
<tokenext>The Puffin is an all-electric one-man airplane So are only men allowed to fly them ?
Or does the technology require the pilot insert a weiner into something to get it to work ; thus making it impossibly to fly for those who are weinerless .
- Catmeat ( weinerless hang-glider pilot )</tokentext>
<sentencetext>The Puffin is an all-electric one-man airplane 

So are only men allowed to fly them?
Or does the technology require the pilot insert a weiner into something to get it to work; thus making it impossibly to fly for those who are weinerless.
- Catmeat (weinerless hang-glider pilot)</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841576</id>
	<title>Go the "Green Spin"</title>
	<author>scdeimos</author>
	<datestamp>1264002540000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>Moore and his colleagues<nobr> <wbr></nobr>... named their craft the Puffin because "if you've ever seen a puffin on the ground, it looks very awkward, with wings too small to fly, and that's exactly what our vehicle looks like," he explains. "But it's also apparently called the most environmentally friendly bird, because it hides its poop, and we're environmentally friendly because we have essentially no emissions.</p></div><p>Yeah, environmentally friendly except for that nasty lithium stuff in the lithium phosphate batteries.</p><p>I can't help but wonder what the glide slope on this thing is like - with those small wings, how quickly will it hit the ground if it runs out of power.</p></div>
	</htmltext>
<tokenext>Moore and his colleagues ... named their craft the Puffin because " if you 've ever seen a puffin on the ground , it looks very awkward , with wings too small to fly , and that 's exactly what our vehicle looks like , " he explains .
" But it 's also apparently called the most environmentally friendly bird , because it hides its poop , and we 're environmentally friendly because we have essentially no emissions.Yeah , environmentally friendly except for that nasty lithium stuff in the lithium phosphate batteries.I ca n't help but wonder what the glide slope on this thing is like - with those small wings , how quickly will it hit the ground if it runs out of power .</tokentext>
<sentencetext>Moore and his colleagues ... named their craft the Puffin because "if you've ever seen a puffin on the ground, it looks very awkward, with wings too small to fly, and that's exactly what our vehicle looks like," he explains.
"But it's also apparently called the most environmentally friendly bird, because it hides its poop, and we're environmentally friendly because we have essentially no emissions.Yeah, environmentally friendly except for that nasty lithium stuff in the lithium phosphate batteries.I can't help but wonder what the glide slope on this thing is like - with those small wings, how quickly will it hit the ground if it runs out of power.
	</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30851086</id>
	<title>air traffic control</title>
	<author>stefski66</author>
	<datestamp>1264067700000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>I want it... as long as I'm the only one: imagine a large city full of people wanting to benefit from individual flight transportation. What a mess. That's why we have ATC.<br>And you know what ? we'll have flight routes, which will be overcrowded like ground road, and you will still be a 2h-commuter, just way farther in distance.</p><p>So no, it's not a commuting solution. However, I leave 1h30 from the sea, it can be cut to 15 min with this thing...</p></htmltext>
<tokenext>I want it... as long as I 'm the only one : imagine a large city full of people wanting to benefit from individual flight transportation .
What a mess .
That 's why we have ATC.And you know what ?
we 'll have flight routes , which will be overcrowded like ground road , and you will still be a 2h-commuter , just way farther in distance.So no , it 's not a commuting solution .
However , I leave 1h30 from the sea , it can be cut to 15 min with this thing.. .</tokentext>
<sentencetext>I want it... as long as I'm the only one: imagine a large city full of people wanting to benefit from individual flight transportation.
What a mess.
That's why we have ATC.And you know what ?
we'll have flight routes, which will be overcrowded like ground road, and you will still be a 2h-commuter, just way farther in distance.So no, it's not a commuting solution.
However, I leave 1h30 from the sea, it can be cut to 15 min with this thing...</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842020</id>
	<title>Puffin looks like a...</title>
	<author>Anonymous</author>
	<datestamp>1264006860000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>flying coffin that contains a supersized penguin that couldn't fit inside completely. Creepy.</p></htmltext>
<tokenext>flying coffin that contains a supersized penguin that could n't fit inside completely .
Creepy .</tokentext>
<sentencetext>flying coffin that contains a supersized penguin that couldn't fit inside completely.
Creepy.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842254</id>
	<title>nice penguin you have there</title>
	<author>vacarul</author>
	<datestamp>1264009200000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>oh look, a flying penguin! where's my riffle?!</htmltext>
<tokenext>oh look , a flying penguin !
where 's my riffle ?
!</tokentext>
<sentencetext>oh look, a flying penguin!
where's my riffle?
!</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841506</id>
	<title>CG concept only</title>
	<author>QuantumG</author>
	<datestamp>1264002120000</datestamp>
	<modclass>Insightful</modclass>
	<modscore>5</modscore>
	<htmltext><p><div class="quote"><p>By March, the researchers plan on finishing a one third-size, hover-capable Puffin demonstrator, and in the three months following that they will begin investigating how well it transitions from cruise to hover flight. They are already looking past the Puffin, however.</p></div><p>And that's why we'll never see a full sized vehicle.</p><p><div class="quote"><p>The next-generation of this design might incorporate more than just two pairs of prop rotors, so that if one was struck by, say, a bird or gunfire, the aircraft could survive on redundant systems. "We could make it so there's no single point of failure--that's the cool next step," Moore says.</p></div><p>Ya know what a cool next step would be?  Actually making the vehicle.</p></div>
	</htmltext>
<tokenext>By March , the researchers plan on finishing a one third-size , hover-capable Puffin demonstrator , and in the three months following that they will begin investigating how well it transitions from cruise to hover flight .
They are already looking past the Puffin , however.And that 's why we 'll never see a full sized vehicle.The next-generation of this design might incorporate more than just two pairs of prop rotors , so that if one was struck by , say , a bird or gunfire , the aircraft could survive on redundant systems .
" We could make it so there 's no single point of failure--that 's the cool next step , " Moore says.Ya know what a cool next step would be ?
Actually making the vehicle .</tokentext>
<sentencetext>By March, the researchers plan on finishing a one third-size, hover-capable Puffin demonstrator, and in the three months following that they will begin investigating how well it transitions from cruise to hover flight.
They are already looking past the Puffin, however.And that's why we'll never see a full sized vehicle.The next-generation of this design might incorporate more than just two pairs of prop rotors, so that if one was struck by, say, a bird or gunfire, the aircraft could survive on redundant systems.
"We could make it so there's no single point of failure--that's the cool next step," Moore says.Ya know what a cool next step would be?
Actually making the vehicle.
	</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843556</id>
	<title>Re:And part of the project is named Icarus?</title>
	<author>Anonymous</author>
	<datestamp>1264066800000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Here's one of their justifications for the name Puffin:</p><p>"But [the puffin is] also apparently called the most environmentally friendly bird, because it hides its poop"</p><p>An inspired choice.</p></htmltext>
<tokenext>Here 's one of their justifications for the name Puffin : " But [ the puffin is ] also apparently called the most environmentally friendly bird , because it hides its poop " An inspired choice .</tokentext>
<sentencetext>Here's one of their justifications for the name Puffin:"But [the puffin is] also apparently called the most environmentally friendly bird, because it hides its poop"An inspired choice.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841660</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842424</id>
	<title>Do I understand this correctly?</title>
	<author>Tibor the Hun</author>
	<datestamp>1264010460000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>It's late and I'm tired, but what they're saying is, if you be Puffin, you be flying high?<br>I'm down with that.</p></htmltext>
<tokenext>It 's late and I 'm tired , but what they 're saying is , if you be Puffin , you be flying high ? I 'm down with that .</tokentext>
<sentencetext>It's late and I'm tired, but what they're saying is, if you be Puffin, you be flying high?I'm down with that.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30848362</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>Anonymous</author>
	<datestamp>1264099860000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>are you including motor weight?</p></htmltext>
<tokenext>are you including motor weight ?</tokentext>
<sentencetext>are you including motor weight?</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842348</id>
	<title>Re:Useless precision in ceiling</title>
	<author>Anonymous</author>
	<datestamp>1264009920000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>At 9150m, a plane such as this which is 180kg + say 80kg human (260kg) holds about <a href="http://www.wolframalpha.com/input/?i=260kg+*+9150m+*+9.81m+s\%5E-2" title="wolframalpha.com">23.34 Mega Joules</a> [wolframalpha.com] of gravitational potential energy. Can 45kg batteries hold this much energy to push it up that high? (Not even considering the power required)</p></htmltext>
<tokenext>At 9150m , a plane such as this which is 180kg + say 80kg human ( 260kg ) holds about 23.34 Mega Joules [ wolframalpha.com ] of gravitational potential energy .
Can 45kg batteries hold this much energy to push it up that high ?
( Not even considering the power required )</tokentext>
<sentencetext>At 9150m, a plane such as this which is 180kg + say 80kg human (260kg) holds about 23.34 Mega Joules [wolframalpha.com] of gravitational potential energy.
Can 45kg batteries hold this much energy to push it up that high?
(Not even considering the power required)</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841766</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842438</id>
	<title>Darwin Lives!</title>
	<author>matt\_hs</author>
	<datestamp>1264010580000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>With two prop electric engines, lithium phosphate batteries and a top speed of almost 300 mph</p></div><p>
Ahhh, newer, faster, and better ways to auger one's self into the ground.</p></div>
	</htmltext>
<tokenext>With two prop electric engines , lithium phosphate batteries and a top speed of almost 300 mph Ahhh , newer , faster , and better ways to auger one 's self into the ground .</tokentext>
<sentencetext>With two prop electric engines, lithium phosphate batteries and a top speed of almost 300 mph
Ahhh, newer, faster, and better ways to auger one's self into the ground.
	</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30847398</id>
	<title>Re:One-man!</title>
	<author>mcgrew</author>
	<datestamp>1264096020000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><i>So are only men allowed to fly them? Or does the technology require the pilot insert a weiner into something to get it to work; thus making it impossibly to fly for those who are weinerless.</i></p><p>A wo'man is a man with a womb, and your militant feminist attitude insures that I won't be asking you out, lady. I pity you.</p><p>A side note -- there is no such thing as a sex change operation. Removing a man's penis and testicles and implanting breast implants and injecting him with hormones that removes facial hair does not make him a woman. He still has a Y chromosome. Which, I doubt, you need to fly one of these things.</p></htmltext>
<tokenext>So are only men allowed to fly them ?
Or does the technology require the pilot insert a weiner into something to get it to work ; thus making it impossibly to fly for those who are weinerless.A wo'man is a man with a womb , and your militant feminist attitude insures that I wo n't be asking you out , lady .
I pity you.A side note -- there is no such thing as a sex change operation .
Removing a man 's penis and testicles and implanting breast implants and injecting him with hormones that removes facial hair does not make him a woman .
He still has a Y chromosome .
Which , I doubt , you need to fly one of these things .</tokentext>
<sentencetext>So are only men allowed to fly them?
Or does the technology require the pilot insert a weiner into something to get it to work; thus making it impossibly to fly for those who are weinerless.A wo'man is a man with a womb, and your militant feminist attitude insures that I won't be asking you out, lady.
I pity you.A side note -- there is no such thing as a sex change operation.
Removing a man's penis and testicles and implanting breast implants and injecting him with hormones that removes facial hair does not make him a woman.
He still has a Y chromosome.
Which, I doubt, you need to fly one of these things.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843972</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842904</id>
	<title>Bad Drivers, Worse Pilots</title>
	<author>thzinc</author>
	<datestamp>1264014840000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>While I think the idea for the aircraft is spiffy, I'm not sure I like the undertones of "people will commute to work with this 'personal flight vehicle'." There are a lot of bad drivers out there, and I wouldn't want to encounter them while they're flying their PFV and talking on their cellphone.</p></htmltext>
<tokenext>While I think the idea for the aircraft is spiffy , I 'm not sure I like the undertones of " people will commute to work with this 'personal flight vehicle' .
" There are a lot of bad drivers out there , and I would n't want to encounter them while they 're flying their PFV and talking on their cellphone .</tokentext>
<sentencetext>While I think the idea for the aircraft is spiffy, I'm not sure I like the undertones of "people will commute to work with this 'personal flight vehicle'.
" There are a lot of bad drivers out there, and I wouldn't want to encounter them while they're flying their PFV and talking on their cellphone.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30845066</id>
	<title>Re:"No flight ceiling"</title>
	<author>home-electro.com</author>
	<datestamp>1264085160000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Hm... Vertical Take off on a electric motor... Minimum 400 kg lift force? I'm too lazy to convert it to required motor power but it sounds not feasible.</p></htmltext>
<tokenext>Hm... Vertical Take off on a electric motor... Minimum 400 kg lift force ?
I 'm too lazy to convert it to required motor power but it sounds not feasible .</tokentext>
<sentencetext>Hm... Vertical Take off on a electric motor... Minimum 400 kg lift force?
I'm too lazy to convert it to required motor power but it sounds not feasible.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841504</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844024</id>
	<title>Extreme Sports</title>
	<author>zigge</author>
	<datestamp>1264073460000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>this opens up the opportunity for loads of new extreme sports!</htmltext>
<tokenext>this opens up the opportunity for loads of new extreme sports !</tokentext>
<sentencetext>this opens up the opportunity for loads of new extreme sports!</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842884</id>
	<title>Hate to bump into something on accident...</title>
	<author>Megatog615</author>
	<datestamp>1264014600000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>I sure hope they put some sort of ring around the props(like a computer cooling fan) to keep them from striking near objects. I'm not saying I'm a terrible driver, but there are such people who can't drive worth a crap. If everyone had one of these I'm sure people would be bumping into buildings in their takeoff or landing procedures. Some sort of hard rubber bumper ring around the props(to prevent damage) would suffice. I'm not sure how it would affect flight capability though(I'm not an aerospace engineer).</p></htmltext>
<tokenext>I sure hope they put some sort of ring around the props ( like a computer cooling fan ) to keep them from striking near objects .
I 'm not saying I 'm a terrible driver , but there are such people who ca n't drive worth a crap .
If everyone had one of these I 'm sure people would be bumping into buildings in their takeoff or landing procedures .
Some sort of hard rubber bumper ring around the props ( to prevent damage ) would suffice .
I 'm not sure how it would affect flight capability though ( I 'm not an aerospace engineer ) .</tokentext>
<sentencetext>I sure hope they put some sort of ring around the props(like a computer cooling fan) to keep them from striking near objects.
I'm not saying I'm a terrible driver, but there are such people who can't drive worth a crap.
If everyone had one of these I'm sure people would be bumping into buildings in their takeoff or landing procedures.
Some sort of hard rubber bumper ring around the props(to prevent damage) would suffice.
I'm not sure how it would affect flight capability though(I'm not an aerospace engineer).</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30845378</id>
	<title>Re:And part of the project is named Icarus?</title>
	<author>Mark\_in\_Brazil</author>
	<datestamp>1264087020000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><div class="quote"><p>I don't understand why so many flight related programs are named Icarus. Let's remember what happened in the myth of Icarus: He flew too close to the sun and so he died.</p></div><p>Yeah.  Imagine what I thought when I got on a Varig plane for an international flight back in the '90s and saw that Varig's in-flight magazine was called <i>&amp;Iacute caro</i>. </p></div>
	</htmltext>
<tokenext>I do n't understand why so many flight related programs are named Icarus .
Let 's remember what happened in the myth of Icarus : He flew too close to the sun and so he died.Yeah .
Imagine what I thought when I got on a Varig plane for an international flight back in the '90s and saw that Varig 's in-flight magazine was called &amp;Iacute caro .</tokentext>
<sentencetext>I don't understand why so many flight related programs are named Icarus.
Let's remember what happened in the myth of Icarus: He flew too close to the sun and so he died.Yeah.
Imagine what I thought when I got on a Varig plane for an international flight back in the '90s and saw that Varig's in-flight magazine was called &amp;Iacute caro. 
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841660</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846446</id>
	<title>Re:Innumeracy?</title>
	<author>PPalmgren</author>
	<datestamp>1264091880000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Thats like saying the flu is 10 times less lethal than AIDS, so it must be OK.  Anyone with knowledge of how loud 50 decibels actually is, and relizes that thats at 150m, is probably with me in covering their ears near one of these things landing.  A parking lot with these things would be deafening.</p></htmltext>
<tokenext>Thats like saying the flu is 10 times less lethal than AIDS , so it must be OK. Anyone with knowledge of how loud 50 decibels actually is , and relizes that thats at 150m , is probably with me in covering their ears near one of these things landing .
A parking lot with these things would be deafening .</tokentext>
<sentencetext>Thats like saying the flu is 10 times less lethal than AIDS, so it must be OK.  Anyone with knowledge of how loud 50 decibels actually is, and relizes that thats at 150m, is probably with me in covering their ears near one of these things landing.
A parking lot with these things would be deafening.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841760</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30850020</id>
	<title>Re:Bad Drivers, Worse Pilots</title>
	<author>rally2xs</author>
	<datestamp>1264107060000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>It would be beyond human capabilities to pilot these vehicles in the traffic densities necessary for commuting.  This'll have to wait until the artificial intelligence is such that it can navigate the machines automatically, and the passenger can sleep all the way to work.  Or wherever.</htmltext>
<tokenext>It would be beyond human capabilities to pilot these vehicles in the traffic densities necessary for commuting .
This 'll have to wait until the artificial intelligence is such that it can navigate the machines automatically , and the passenger can sleep all the way to work .
Or wherever .</tokentext>
<sentencetext>It would be beyond human capabilities to pilot these vehicles in the traffic densities necessary for commuting.
This'll have to wait until the artificial intelligence is such that it can navigate the machines automatically, and the passenger can sleep all the way to work.
Or wherever.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842904</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842076</id>
	<title>Re:"No flight ceiling"</title>
	<author>Suki I</author>
	<datestamp>1264007340000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><i>This leads to a question: How high up could it go before the air becomes too thin to generate enough lift to continue ascending?</i>

Whatever that height is would be the flight ceiling.

Still sounds like whop, whop, whopor ware to me.</htmltext>
<tokenext>This leads to a question : How high up could it go before the air becomes too thin to generate enough lift to continue ascending ?
Whatever that height is would be the flight ceiling .
Still sounds like whop , whop , whopor ware to me .</tokentext>
<sentencetext>This leads to a question: How high up could it go before the air becomes too thin to generate enough lift to continue ascending?
Whatever that height is would be the flight ceiling.
Still sounds like whop, whop, whopor ware to me.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841504</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842472</id>
	<title>Re:Innumeracy?</title>
	<author>Brett Buck</author>
	<datestamp>1264010820000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><blockquote><div><p>I admit that I never have gotten a handle on math beyond algebra but am I wrong by being bothered by statements like 10 times quieter? Wouldn't be better to say "makes only one-tenth the noise?" Or am I being pedantic?</p></div></blockquote><p>No, not as far as I am concerned. You are not being overly pedantic, even by local standards. It's a very awkward choice of words.</p></div>
	</htmltext>
<tokenext>I admit that I never have gotten a handle on math beyond algebra but am I wrong by being bothered by statements like 10 times quieter ?
Would n't be better to say " makes only one-tenth the noise ?
" Or am I being pedantic ? No , not as far as I am concerned .
You are not being overly pedantic , even by local standards .
It 's a very awkward choice of words .</tokentext>
<sentencetext>I admit that I never have gotten a handle on math beyond algebra but am I wrong by being bothered by statements like 10 times quieter?
Wouldn't be better to say "makes only one-tenth the noise?
" Or am I being pedantic?No, not as far as I am concerned.
You are not being overly pedantic, even by local standards.
It's a very awkward choice of words.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841760</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30843506</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>mjwx</author>
	<datestamp>1264066200000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><blockquote><div><p>Until there is a radically different battery, this is unrealistic.</p></div></blockquote><p>

Or a radically different power draw. Not every innovation is about more, the turbofan is better then the pulse jet because it uses a lot less fuel.</p></div>
	</htmltext>
<tokenext>Until there is a radically different battery , this is unrealistic .
Or a radically different power draw .
Not every innovation is about more , the turbofan is better then the pulse jet because it uses a lot less fuel .</tokentext>
<sentencetext>Until there is a radically different battery, this is unrealistic.
Or a radically different power draw.
Not every innovation is about more, the turbofan is better then the pulse jet because it uses a lot less fuel.
	</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841780</id>
	<title>Re:"No flight ceiling"</title>
	<author>ceoyoyo</author>
	<datestamp>1264004640000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>VTOL aircraft have to be overpowered to pull off the takeoff and landing, but with a top speed of 250 km/h (ground speed, presumably) and those little wings I wouldn't count on getting to 9000 metres, never mind higher.</p></htmltext>
<tokenext>VTOL aircraft have to be overpowered to pull off the takeoff and landing , but with a top speed of 250 km/h ( ground speed , presumably ) and those little wings I would n't count on getting to 9000 metres , never mind higher .</tokentext>
<sentencetext>VTOL aircraft have to be overpowered to pull off the takeoff and landing, but with a top speed of 250 km/h (ground speed, presumably) and those little wings I wouldn't count on getting to 9000 metres, never mind higher.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841504</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841524</id>
	<title>thin air?</title>
	<author>SuperBanana</author>
	<datestamp>1264002240000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p> <i> since the engine is electric it has no flight ceiling and can fly up to 9,150 meters high, uninhibited by thin air</i>

</p><p>Seriously, who who wrote this?  Thin air = less air for the props to bite, and less air to provide lift for the wings.

</p><p>And who calls an electric motor an "engine"?  Gaaaah.  If this were Wired, I'd be more forgiving on both counts- but this is Scientific American!</p></htmltext>
<tokenext>since the engine is electric it has no flight ceiling and can fly up to 9,150 meters high , uninhibited by thin air Seriously , who who wrote this ?
Thin air = less air for the props to bite , and less air to provide lift for the wings .
And who calls an electric motor an " engine " ?
Gaaaah. If this were Wired , I 'd be more forgiving on both counts- but this is Scientific American !</tokentext>
<sentencetext>  since the engine is electric it has no flight ceiling and can fly up to 9,150 meters high, uninhibited by thin air

Seriously, who who wrote this?
Thin air = less air for the props to bite, and less air to provide lift for the wings.
And who calls an electric motor an "engine"?
Gaaaah.  If this were Wired, I'd be more forgiving on both counts- but this is Scientific American!</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30842052</id>
	<title>Cobra was first!</title>
	<author>Kostya</author>
	<datestamp>1264007100000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p>Bah!  Hardly original.  Cobra C.L.A.W. anyone?</p><p>
&nbsp; &nbsp; &nbsp; &nbsp; <a href="http://www.yojoe.com/vehicles/84/claw/" title="yojoe.com">http://www.yojoe.com/vehicles/84/claw/</a> [yojoe.com]</p></htmltext>
<tokenext>Bah !
Hardly original .
Cobra C.L.A.W .
anyone ?         http : //www.yojoe.com/vehicles/84/claw/ [ yojoe.com ]</tokentext>
<sentencetext>Bah!
Hardly original.
Cobra C.L.A.W.
anyone?
        http://www.yojoe.com/vehicles/84/claw/ [yojoe.com]</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30847930</id>
	<title>Puffin</title>
	<author>ISoldat53</author>
	<datestamp>1264098060000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>I wonder if they looked up anything about a puffin. It is a notoriously bad flier. They don't all them scuba pigeons for nothing.</htmltext>
<tokenext>I wonder if they looked up anything about a puffin .
It is a notoriously bad flier .
They do n't all them scuba pigeons for nothing .</tokentext>
<sentencetext>I wonder if they looked up anything about a puffin.
It is a notoriously bad flier.
They don't all them scuba pigeons for nothing.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841680</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846218</id>
	<title>Worthless Press Release</title>
	<author>Anonymous</author>
	<datestamp>1264090860000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>The initial posting is a complete waste of time and electrons.<br>This NASA project has no hardware, it is a press release.</p><p>60 HP is not going to get you 300 kTAS, even at 30,000'</p><p>There are several already flying homebuilt electric aircraft that<br>have flown at large gatherings of pilots, like Airventure (Oshkosh)</p></htmltext>
<tokenext>The initial posting is a complete waste of time and electrons.This NASA project has no hardware , it is a press release.60 HP is not going to get you 300 kTAS , even at 30,000'There are several already flying homebuilt electric aircraft thathave flown at large gatherings of pilots , like Airventure ( Oshkosh )</tokentext>
<sentencetext>The initial posting is a complete waste of time and electrons.This NASA project has no hardware, it is a press release.60 HP is not going to get you 300 kTAS, even at 30,000'There are several already flying homebuilt electric aircraft thathave flown at large gatherings of pilots, like Airventure (Oshkosh)</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841838</id>
	<title>Just one thing...</title>
	<author>WheelDweller</author>
	<datestamp>1264005360000</datestamp>
	<modclass>None</modclass>
	<modscore>-1</modscore>
	<htmltext><p>Remember what these guys can do with a mere DODGE NEON?  Add a third dimension and the ability to be unaware of restricted airspace, falling into open mines, lakes, and rivers...you'll quickly learn why people never developed flying cars!<nobr> <wbr></nobr>:&gt;</p></htmltext>
<tokenext>Remember what these guys can do with a mere DODGE NEON ?
Add a third dimension and the ability to be unaware of restricted airspace , falling into open mines , lakes , and rivers...you 'll quickly learn why people never developed flying cars !
: &gt;</tokentext>
<sentencetext>Remember what these guys can do with a mere DODGE NEON?
Add a third dimension and the ability to be unaware of restricted airspace, falling into open mines, lakes, and rivers...you'll quickly learn why people never developed flying cars!
:&gt;</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30844240</id>
	<title>It's good to know...</title>
	<author>Anonymous</author>
	<datestamp>1264075860000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p><nobr> <wbr></nobr>... that NASA is still hard at work on some General's wet dream.<nobr> <wbr></nobr>:(</p><p>I will eat my hat if this thing ever makes it to production.</p></htmltext>
<tokenext>... that NASA is still hard at work on some General 's wet dream .
: ( I will eat my hat if this thing ever makes it to production .</tokentext>
<sentencetext> ... that NASA is still hard at work on some General's wet dream.
:(I will eat my hat if this thing ever makes it to production.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30848334</id>
	<title>Re:Battery powered aircraft:Completely unrealistic</title>
	<author>fljmayer</author>
	<datestamp>1264099740000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>You are not counting the weight of the engine. An electric motor is much lighter than any gasoline engine or turbine. Therefore the energy density of an electric propulsion system is better than 1\% of a gasoline system.</htmltext>
<tokenext>You are not counting the weight of the engine .
An electric motor is much lighter than any gasoline engine or turbine .
Therefore the energy density of an electric propulsion system is better than 1 \ % of a gasoline system .</tokentext>
<sentencetext>You are not counting the weight of the engine.
An electric motor is much lighter than any gasoline engine or turbine.
Therefore the energy density of an electric propulsion system is better than 1\% of a gasoline system.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841824</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841988</id>
	<title>Re:A Tail Sitter?</title>
	<author>Anonymous</author>
	<datestamp>1264006560000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext><p><i>Tail sitters like the Convair Pogo were a beast to land.</i></p><p>That's because the pilot was on his back, looking straight up when the Pogo was landing on its tail.  The Puffin would have the pilot in a standing position during takeoff and landing.</p><p>-jcr</p></htmltext>
<tokenext>Tail sitters like the Convair Pogo were a beast to land.That 's because the pilot was on his back , looking straight up when the Pogo was landing on its tail .
The Puffin would have the pilot in a standing position during takeoff and landing.-jcr</tokentext>
<sentencetext>Tail sitters like the Convair Pogo were a beast to land.That's because the pilot was on his back, looking straight up when the Pogo was landing on its tail.
The Puffin would have the pilot in a standing position during takeoff and landing.-jcr</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841864</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841716</id>
	<title>Safe design?</title>
	<author>Anonymous</author>
	<datestamp>1264003860000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Great! it's your head first hurt once you hit the ground in case of accident. I suppose this is to save you some pain in case you survive otherwise.</p></htmltext>
<tokenext>Great !
it 's your head first hurt once you hit the ground in case of accident .
I suppose this is to save you some pain in case you survive otherwise .</tokentext>
<sentencetext>Great!
it's your head first hurt once you hit the ground in case of accident.
I suppose this is to save you some pain in case you survive otherwise.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30846148</id>
	<title>Will you stop already?</title>
	<author>Quiet\_Desperation</author>
	<datestamp>1264090560000</datestamp>
	<modclass>None</modclass>
	<modscore>1</modscore>
	<htmltext>Just stop with these promises of personal flight stories. It's been promised on a weekly basis since the Wright boys converted the bike shop, or maybe even the first Montgolfier balloon. You think the FAA is going to let it happen? The PILA? (Personal Injury Lawyer Army). Most people's inability to move safely in just one or two dimensions much less three? This will be a toy that some billionaire plays with before getting bored or cratering, and maybe the military will be interested for about a month.</htmltext>
<tokenext>Just stop with these promises of personal flight stories .
It 's been promised on a weekly basis since the Wright boys converted the bike shop , or maybe even the first Montgolfier balloon .
You think the FAA is going to let it happen ?
The PILA ?
( Personal Injury Lawyer Army ) .
Most people 's inability to move safely in just one or two dimensions much less three ?
This will be a toy that some billionaire plays with before getting bored or cratering , and maybe the military will be interested for about a month .</tokentext>
<sentencetext>Just stop with these promises of personal flight stories.
It's been promised on a weekly basis since the Wright boys converted the bike shop, or maybe even the first Montgolfier balloon.
You think the FAA is going to let it happen?
The PILA?
(Personal Injury Lawyer Army).
Most people's inability to move safely in just one or two dimensions much less three?
This will be a toy that some billionaire plays with before getting bored or cratering, and maybe the military will be interested for about a month.</sentencetext>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30845138</id>
	<title>Re:Innumeracy?</title>
	<author>Anonymous</author>
	<datestamp>1264085640000</datestamp>
	<modclass>None</modclass>
	<modscore>0</modscore>
	<htmltext><p>Yes.</p><p>And yes.</p></htmltext>
<tokenext>Yes.And yes .</tokentext>
<sentencetext>Yes.And yes.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841760</parent>
</comment>
<comment>
	<id>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30848740</id>
	<title>Re:psst, NASA, just one little thing.</title>
	<author>Anonymous</author>
	<datestamp>1264101540000</datestamp>
	<modclass>Interestin</modclass>
	<modscore>1</modscore>
	<htmltext><p>It would if the charge logic had additional data lines to communicate if some of the lithium cells had been disabled.</p><p>This is the current problem with consumer electronics, is that the charge logic does not convey to the device that it has disabled some of the cells for safety reasons, and that thus, your 5000mAh battery is really only a 3200mAh battery. Thus, the device presumes it has more power remaining than it actually has.</p><p>If the charge logic properly reported what kind of cell it was attached to, how many cells were functional, and what the charge states were of those cells, it would result in a more or less accurate (to within a minute or so) of the actual charge time remaining.</p><p>The problem is that charge logic of that kind would increase the weight of the battery, increase the complexity of the battery, and increase the cost of the battery.  All three things are subjects that consumer electronics bean counters dont want to even consider doing unless absolutely necessary.</p><p>Considering that this is being engineered for military purposes, I'd expect much better charge logic to be installed, and for the battery meter to be more accurate than the one for your 3oz cellphone.</p></htmltext>
<tokenext>It would if the charge logic had additional data lines to communicate if some of the lithium cells had been disabled.This is the current problem with consumer electronics , is that the charge logic does not convey to the device that it has disabled some of the cells for safety reasons , and that thus , your 5000mAh battery is really only a 3200mAh battery .
Thus , the device presumes it has more power remaining than it actually has.If the charge logic properly reported what kind of cell it was attached to , how many cells were functional , and what the charge states were of those cells , it would result in a more or less accurate ( to within a minute or so ) of the actual charge time remaining.The problem is that charge logic of that kind would increase the weight of the battery , increase the complexity of the battery , and increase the cost of the battery .
All three things are subjects that consumer electronics bean counters dont want to even consider doing unless absolutely necessary.Considering that this is being engineered for military purposes , I 'd expect much better charge logic to be installed , and for the battery meter to be more accurate than the one for your 3oz cellphone .</tokentext>
<sentencetext>It would if the charge logic had additional data lines to communicate if some of the lithium cells had been disabled.This is the current problem with consumer electronics, is that the charge logic does not convey to the device that it has disabled some of the cells for safety reasons, and that thus, your 5000mAh battery is really only a 3200mAh battery.
Thus, the device presumes it has more power remaining than it actually has.If the charge logic properly reported what kind of cell it was attached to, how many cells were functional, and what the charge states were of those cells, it would result in a more or less accurate (to within a minute or so) of the actual charge time remaining.The problem is that charge logic of that kind would increase the weight of the battery, increase the complexity of the battery, and increase the cost of the battery.
All three things are subjects that consumer electronics bean counters dont want to even consider doing unless absolutely necessary.Considering that this is being engineered for military purposes, I'd expect much better charge logic to be installed, and for the battery meter to be more accurate than the one for your 3oz cellphone.</sentencetext>
	<parent>http://www.semanticweb.org/ontologies/ConversationInstances.owl#comment10_01_20_2350239.30841526</parent>
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