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Old 07-04-2013, 09:24 PM   #12 (permalink)
Frank Lee
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I see from the first link there is one simple planetary gearset between the motor and the differential.

Quote:
A typical efficiency loss in a planetary gearbox arrangement is only 3% per stage. This type of efficiency ensures that a high proportion of the energy being input is transmitted through the gearbox, rather than being wasted on mechanical losses inside the gearbox.
Epicyclic gearing - Wikipedia, the free encyclopedia

So 3%? Then add in some bearing and CV joints for, oh, 5%?
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