How inefficient is powered flight!

Talk about anything hang gliding.

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OP
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How inefficient is powered flight!

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[youtube]http://www.youtube.com/watch?v=LVwmtwZL ... ature=fvwp[/youtube]

Lift achieved by throwing propellers down to earth.


This guy and newton where wrong!
http://en.wikipedia.org/wiki/Bernoulli's_principle
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