Meccano 6-Speed and reverse gearbox
A variation of the Andreas Konkoly 9-speed and reverse gearbox. It has more sensible gear ratios and no overdrive ratios. They are 12:1, 6:1, 4:1, 3:1, 2:1 and 1:1. The first three ratios are available in reverse. The reason for the coupling with short pivot rod is a crank would get in the way of the 60 tooth gear wheel.
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