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Originally posted by getreadyalready
Come on folks, there is some science there worth considering. He is talking about using the sun's heat, and the properties of a steel cable to produce a mechanical force. It will work, but it will likely be less force than is required to flip the cable over. If the cable is elastic enough to expand and contract with the heat, then it is also too elastic to turn over easily. Therefore, it would take multiple motorized units along the length to roll the cable from the dark side to the light side. Any mechanical energy gained from the expansion and contraction on the spring would be offset by the energy used to flip it over.
As with all things, there is no such thing as "overunity." There is always a trade off.
His language wasn't as bad as you guys made out.