[DrKnow65]

I am also pondering the workings of our brushless motors. I think the magnets are a limiting factor in the general design. No matter how much force the windings pull, they are still working against a static magnet. I.E. if there were stronger magnets to make the rotor out of, the whole motor would produce more force per watt.

I wounder if going with an electromagnetic rotor would increase the force to a point of overcoming the efficiency of the work the natural magnet produces on its own. Like putting a brushed style rotor in a brushless wound can ( just use a ring style contact as opposed to a slotted contact). One could even pulse the rotor once to feedback through the can windings to tell the exact rotor position. When braking, the regenerative voltage could work just like a standard alternating generator. The outcome being, using less watts ( say than that of a nue 1521) to make more power (than a 1521) in a can the size of a 1509. Could possibly even reduce watts lost to heat by deviding the work equally between each set of windings (rotor and can). Think it's worth persuing? (lots and lots of math involved, learning about field density, electromotive force, esc design, esc).