[Bazz4CQJ]

Does the loading on a model engine change very much as it moves around the track? It's not an area where I'm up to date with what kind of power supplies and controllers are being used - I vaguely recall reading about various ways they been improved since the days when it was purely a variable transformer. I think that in the case of the mini-drills, which are not geared down and typically run at quite high speeds, any loading rapidly reduces the torque and they will easily stall. Hence my interest in going away from the usual PW controllers, which have no feedback system, to the design discussed here which will try to keep the drill turning even if the load increases appreciably.

B