Aeronaut wrote:
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I’ll see if I can get the link to a site that rigorously demonstrates how various “over-unity” devices succumb to one or more laws of thermodynamics, which I’d like to preface that section with.
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Are you talking about the free energy/zero point energy kind of stuff? There’s an irritating but amusing thing that keeps coming up at the TeslaMotors discussion site. People keep suggesting driving generators with the EV axles, or using windmills on the car to harness air movement from the forward motion, or (latest) a second battery pack which is being charged by the motion created by the first pack — all resulting in free energy! The loons suggesting this stuff are always all excited about how they’ve discovered a way to drive for free …

I replied to the last one with just “TANSTAAFL”.