[simplechamp]

I always thought that heat = higher resistance in the windings = more power wasted. Isn't it a kind of cycle, like a certain motor is inefficient, so it produces more heat, the heat causes even more resistance, so it gets even hotter, and so on? I would imagine this happens to all motors to some degree, but certain designs are more efficient that others, reducing the overall effect.

I might take a hint from Arct1k and start dipping my motors in liquid nitrogen before each run.