Tom blok Photo collection by Th.Schiöler Spiral scoops, screws and the chain pump Tread-wheels Photo 155
Tread-wheels
Gul streg
Photo 511 x 506 pixels, 43,6 K
 
Tread-wheels experiment
Man and beast have power in their legs. The tread-wheel is a device, which makes best use of manpower. Unfortunately, the great weight of a man makes the construction a bit clumsy.
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