WOW, Thanks Castle and RC-Monster, MMM V2

[Sammus]

I think thats one way of looking at it. More winds = longer length of wire = more resistance = less current at a given voltage. I think that isn't really valid thought because in an electric motor there are other influences from the rotating magnetic field etc, so the resistance of the winds dont follow ohms law like that.

The way I look at it (which could well be wrong) is that firstly, more current = more heat. Then recalling some high school physics classes, reason the following: Say to you want the power to wheelie at a given speed, that comes down to requiring a certain amount of torque at a certain rpm. To attain that torque you need to draw a certain amount of current.. (torque is proportional to current through the winds).

Torque is also proportional to the number of winds, so with more winds, you need higher V to get to your rpm, but you dont draw as much current = less heat.