Quote:
Originally Posted by Manic!
BC ferries uses electric motors to drive the ferries. Also cars use electric fans and those seem to last.
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Do they go 18k RPM? Things go out of balanced in the car all the time like drive shafts. They start to wobble and vibrate. The faster they spin, the more it vibrates eventually destroying itself. Think of your washing machine on the spin cycle when the balance is off. If the motor becomes unbalanced after hitting a pothole, you may not notice it at first but it'll eventually wreck itself. It'll get there faster at higher RPMs. If the motor runs at a lower RPM through the use of a transmission, it may last a lot longer.