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Gravity Powered Aircraft Concept
Posted: 17 May 2007, 22:11
by Nigel H-J
Just watched this............Boy, can I tell you..........my head was just spinning afterwards........trying very hard to keep up with the commentary of how this aircraft will fly and why it will fly and why it will keep flying.......Anyone got an aspirin?
http://www.youtube.com/watch?v=1IsaMc9mpLI
Posted: 17 May 2007, 22:50
by kit
My brain hurts too..........
I wonder if they ever worked out how they would keep the 'compressed air' stored? At any pressure they'd need big and HEAVY bottles to store it, thus negating a lot of the 'lighter than air' business.
Posted: 17 May 2007, 23:42
by blanston12
It makes my brain hurt also,
So does this fall into the category of perpetual motion machine?
Posted: 17 May 2007, 23:50
by Garry Russell
Interesting :k:
A bit like a submarine in that it replaces a heavier element with a lighter one to rise and descend......Sound good but will it work in a practical sense :think:
Garry
Posted: 18 May 2007, 08:09
by Nigel H-J
My brain hurts too..........
I wonder if they ever worked out how they would keep the 'compressed air' stored? At any pressure they'd need big and HEAVY bottles to store it, thus negating a lot of the 'lighter than air' business.
Kit,
may be that they would use inflatable bags......the heavy duty type....if there is such a thing!!
Gravity powered aircraft
Posted: 18 May 2007, 10:26
by hobby
I believe that gravity powered aircraft are quite commonplace. Keep it simple. They are called gliders!
Posted: 18 May 2007, 16:20
by airboatr
Sounds good..but I hope they don’t have any helium leaks into the passenger cabin
Otherwise everybodies gonna be talking funny
Posted: 18 May 2007, 19:37
by cstorey
I'm assuming it's a leg pull, but if it's not then it sounds like pure drivel to me. Why should it need wings if it is a lighter than air machine? Also, whoever thought of this plainly has no idea of the quantities of helium required to provide lift ( this was why airships were so enormous ) . Furthermore, if its thrust is provided by compressed air, the weight of air required also would be catastrophic ( consider that the weight of air at sea level is 14.7 lbs per square inch ) and the tanks needed for both helium and air would be very heavy indeed. The proposals for increasing mass by injecting compressed air to descend sound like pure lunacy - where does the fuel come from to run the compressors?
Posted: 19 May 2007, 01:28
by blanston12