Homemade BB Drive Electric Bicycle
Автор: hutchtransfer
Загружено: 2012-03-24
Просмотров: 1027494
Описание:
This bicycle has a Unite MY1018Z 450W 24V motor attached to the cranks. The motor has a 7.18:1 gear reduction built into the motor itself, and there is an addtional 4:1 reduction from the motor to the cranks. I have a special freewheeling crank system that allows the motor to turn the chain and the pedals to remain stationary. I also have a Megarange freewheeling sprocket in which the smallest gear has 14 teeth, and the largest is 34 teeth. This gearing allows for a maximum speed of 28mph. Normal cruising is around 20 mph with no hills or wind. The beauty of this system is that I can use my bicycle's six gears to match road conditions. The motor sprocket has a freewheel so that if I pedal without the motor, there is no drag caused by the motor itself.
Check out my video for making the freewheel sprocket on the motor: • Homemade Freewheel Sprocket for MY1018Z Motor
Also check out my video of how I build my freewheel crankset with triple chainrings: • Homemade Freewheel Crank with Triple Chain...
A link to this bicycle is now live here: http://www.evalbum.com/4206
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