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As I understand it, KV has a counterpart, KT, torque constant, which expresses torque generated as newton-meters per amp. KT = 9.55 / KV (because 60/2pi...) So, a 1400kv motor would have a KT of .0068, which multiplied by its max current of 88 amps, gives just about 0.6 newton-meters. Dividing...

The challenge with such "low" RPM's is that the motor is going to have to make up for lack of gear reduction with raw torque. From those sensored motors I linked, the biggest, lowest-KV one, a 1400kv 4274 on 2S, would spin at around 12k RPM, and it may very well have enough torque from a...

I don't know as much about outrunners or mounting them, but I have a few ideas about the inrunner... For the axle, here's a metal version of the HSP crawler solid axle, which uses the same ring & pinion gear as their other 1/10ths, so it's good to at least 7k rpm in my experience. With 80mm...