Hi everybody, I' m back with a weird machine, "Stand Up Bob !!" is halfway between Legway and spinning top: (URL) Meet "Stand up Bob !!" in GYROSCIENCE on my site: (URL) The simplest machine of the world: 2 motors, 2 wheels and batteries..and that' (...) (21 years ago, 30-Mar-04, to lugnet.technic, FTX) !
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