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But that's not "free energy" it's just using the energy that was put into the spring by compressing it.
the device doesn’t return to the startposition. ".
Quote from: Bored chemist on 29/08/2018 12:02:48 the device doesn’t return to the startposition. ".That's the bit that matters.If it doesn't return to the original condition then you haven't got a closed cycle from which you can repeatedly take energy.It's like hydroelectric power- it only works because of rain.