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Re: (ET) motors
Very useful data point. That puts my estimates on the conservative side.
My habit, for good or ill, is to defy my own conservative estimates and push hardware a little past their ratings. So far, so good: it seems hardware ratings themselves tend toward the conservative. That's a choice, though, and caveat emptor.
Our tractors' drive motors are shunt-wound, while CitiCar motors are series-wound. Series-wound are a little easier to control in EV applications... to get to higher top speed with shunt-wounds, you have to have circuitry for field-weakening, and that's marginally more complicated than just hitting the motor with full voltage from the battery pack.
I am experimenting right now with a HUGE shunt-wound motor in a truck conversion... and I'll be figuring out field weakening mechanisms a little later!
-M