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Originally posted by Arbitrageur
reply to post by confreak
It says the wingspan is 2 meters, only slightly larger than the height of an adult male.
I don't know what you mean by width, did you mean wingspan? A 2 meter wingspan would be somewhat proportional with a 1.5 meter length.
And I think based on those dimensions, it's safe to say the plane in the photos isn't that size.
You don't even need an electric motor for that, all you need are thermals, you can do it with a glider while the sun is shining. Skilled glider pilots can catch thermals and stay airborne for long periods of time, but as soon as the sun goes down, the source of energy for the thermals (and the plane's "propulsion") is gone until sunrise.
Originally posted by gift0fpr0phecy
In all my years of studying perpetual motion devices, I have never see or heard of the concept I just described, and it is unique as in I think it can only work with an aircraft that has a wing and a propeller connected to an electric motor / generator.