Gravity Powered Flying Machine?

[Agammamon]

Or jumping off a cliff, unfortuantely running out of "fuel" is a real pain.

 

[neutrino_cannon]

Or jumping off a cliff, unfortuantely running out of "fuel" is a real pain.

Potential energy? Nah, it's the kinetic energy that flattens you into an unrecognizable puddle when you hit the ground that's a problem.

 

[pupdog]

Reminds me of the "0220", the dirigible that contained a vacuum instead of light gas. This is the airship that Tarzan flew into the hollow Earth in "Tarzan at the Earth's Core" by Edgar Rice Burroughs.

 

[Beerina]

As if he will recover enough energy from wind generators gliding back down to fully charge up his compressed air containers. Sorry!


The ancient Flash Gordon comics used some kind of anti-gravity material. They used to wear backpacks weighted for their body weight to fly around.

 

[epepke]

http://www.fuellessflight.com/index1.htm

Sounds more like a perpetual motion machine to me.

Don't we have these, and aren't they called "gliders"?