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Uploaded on Aug 23, 2006
This hexnuts-disk better demos my original idea. Once we understand how the effect is produce, yes Igor we can Engineer it, producing a much improved artifical version. In this one each nut on the truck wheel is first aligned radially, then each nut in sequence is rotated backwards by 6 degrees. With this setup the flashing facets of the nuts create a VERY obvious reverse-rotation illusion.