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Old 02-08-09, 08:16 PM
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Motor Efficiency Break Even Point

I took the numbers that we used in the last calculation and produced a chart that shows how motor efficency can completely negate any advantage that regen might deliver. If one attempts regen and ignores the value of proper gearing their chances of beating the bike with a freewheel (and multispeed gearing) is low. Real world riding needs to have sufficient gearing to cover differing slopes.

Depending on the rules of the race (and if we are talking about ebikes and not emotorcycles) we would likely have to deal with some restriction on power output or input for the motor too.

Anyway... this gives an idea of how critical efficiency is to this comparision.

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Last edited by safe; 02-08-09 at 08:23 PM.
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