Quote:
Originally Posted by RC-Monster Mike
I am pretty sure the 1st pair of numbers indicate the stator diameter and the 2nd pair indicates the rotor length - a 1717 has 1.7" stator diameter and 1.7" rotor length(magnet). A 1521 would then be 1.5" stator diameter and 2.1" rotor length.
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That was my understanding too, but then given this info from Patrick:
Quote:
Originally Posted by Pdelcast
We developed a whole new stator and rotor design for this car -- it uses a shorter and lighter rotor for faster spin-up, and is up to 4% more efficient than the original 1717.
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... how can it still be a 1717? If the rotor is shorter?
Wouldn't that make it a 1716 or a 1715?