Quote:
Originally Posted by zapato
What the OP is talking about is leveraging wind resistance and headwind to generate power for a net gain, which is impossible.
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Yes, it's impossible - just as bumblebees can't fly, those silly Wright Brothers will never get that contraption off the ground, and rockets won't work in space because there's nothing for them to push against.
I prefer the alternative hypothesis: that the people claiming these things were impossible just didn't understand the physics :-)