Quote:
Originally Posted by Daox
If your electric motor is putting out any reasonable amount of power, there is no way an A/C clutch is going to be able to hold that much torque.
Have you looked into how much the overrunning clutch is going to cost Ryland?
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Looks like I can get the bearing clutch that is used in a heavy duty over running clutch for $111 or so from Mcmaster Carr, it can handle 59 foot pounds of torque, Specs for the NetGain Warp 7 motor seems to say that it's peek torque is around 45 foot pounds and that is a slightly larger motor then a standard golf cart motor.
But I don't think a clutch would be needed at all, at least not with my idea of having the motor throttle match the gas engine throttle so the motor is always giving a little boost, the only time I could see you not wanting the motor to run would be a cross country trip where you didn't have a chance to charge, but even with an 8 hour trip a 100 amp hour, 48v battery pack would be able to sustain a 600 watt draw, so after losses maybe half a HP of added power, if it really takes 15hp to maintain highway speed then that would be a 3% gain in your worst case of driving 8 hours straight, of course when was the last time you drove 8 hours straight? that's why we have trains and airplanes! and your biggest gains would be while driving short trips where you could use the whole 4,800 watt hours (just an educated guess at pack size) over the course of a 5-10 mile trip to off set gasoline use.