August 24, 2013 Add as a preferred source on Google Add as a preferred source on Google If you ever need a big pump to move water or air, it's not too hard to make your own with PVC pipe. The video ...
Despite the claims of “free energy” on the title of the video below, this is not yet another wacky perpetual motion story. We here at Hackaday fully support the laws of thermodynamics, and we think ...
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