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Pedal Power Transmission

Pedal Power Transmission

Pedal Power Transmission

(OP)
I want to make a heavy duty transmission that can reduce bicycle (actually a supported unicycle)pedal power by 3:1, 6:1 or 12:1 and have a clutch to disengage the whole wheel.  This drives a reqular trailer wheel.  I need an engineer to help me make the basics and possbily create such a device.  If this already exists, please advise.  Photo of the prototype of the device is available on request.

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