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Re: Dual CIM+CIMple box powered bike
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so 4614(motor rpm) X (1/33.8) = 136.5rpm at wheels |
Re: Dual CIM+CIMple box powered bike
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140 rpm with a gear ratio of 2.65x12.75 = 33.79 gives a CIM speed of 4730 rpm, which is 89% of free speed At 89% speed, the CIM torque is 11% of stall and the efficiency is 64.6% The max efficiency is 64.7% at 4648 rpm EDIT: I got interrupted while crunching the numbers and after I posted I saw your most recent post clarifying that you indeed meant peak efficiency. It looks like a lot of fun to ride. Are those 24" tires ? |
Re: Dual CIM+CIMple box powered bike
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Re: Dual CIM+CIMple box powered bike
I was thinking about doing something like this as well, would it be feasible to mount a variable resistor to the handle to control speed? I'm not good with motors or electricity at all, but I think it would go a long way for control or safety.
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Re: Dual CIM+CIMple box powered bike
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definition 1 yes definition 2 no1 1 assuming by "variable resistor" you meant a variable load resistor in series with the motor. If you meant a potentiometer to create a control signal to be read by a microcontroller and used as an input signal to an appropriately-sized motor controller, then yes. |
Re: Dual CIM+CIMple box powered bike
But why not?
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Re: Dual CIM+CIMple box powered bike
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