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Old 02-07-2009, 03:02 PM   #15 (permalink)
Bicycle Bob
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For short-term storage, you could conserve the heat, and keep the size manageable for safety. However, since hybrids usually benefit from more range, they would already have electric motors, and overall, it would be more efficient to add a small amount of capacitor storage to the battery bank, to be used first when going from accelerator to brake and vice-versa. That would eliminate the inefficiency of battery charging/discharging for significant portions of a city run. For the high power rates involved in braking from high speed, air motors would be a nice auxiliary, but how often would they get to pay their way?
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