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Fuel-Less Gravity Powered Airplane

Any thoughts on whether or not this is a feasible concept?
Some of the comments following the video are worth reading before posting a reply.

http://www.youtube.com/watch?v=tPbu5UeW4uk&feature=related

NB: I know this is aviation related, but didn’t think it fitted into any of the other categories, so I’ll let the mods decide if it should move or stay here.

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By: Bruggen 130 - 29th December 2008 at 13:29

Please correct me if i’m wrong, but arn’t compressed air tanks kind of heavy?

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By: AE90 - 29th December 2008 at 11:22

This is something akin to a perpetual motion machine, isn’t it?

Even if it did work, what would be the practical application?

not really there is still energy lost through air resistance etc, this is just generated again, perpetual motion machine has 100% efficiency.

the concept may well hold water but i would question it’s stability

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By: jbritchford - 29th December 2008 at 10:59

This is something akin to a perpetual motion machine, isn’t it?

Even if it did work, what would be the practical application?

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By: Corsair82pilot - 29th December 2008 at 06:00

I have flown gravity powered aircraft. Both times I was lucky to find a place to land. I hate it when the engine gets quiet. 😮

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By: steve rowell - 29th December 2008 at 00:12

Ho Hum..more pie in the sky!!

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