Neu motor rpm speed question for BrianG

Originally Posted by BrianG

Define "better".

If better means "more efficient"; to me it doesn't matter if temps during my informal testing are any guide.

If better means "smoother"; then yes. I daresay almost as smooth as a sensored setup at low speed. Smoother running would also lessen the chance of cogging at really low speeds - and we know that a cogging (effectively stalled) motor pulls LOTS of current.

You don't want to go crazy with this idea though, like putting a 1527/1d (kv=2300) on 6s lipo on a 8th scale buggy, but gear down for 20mph. The motor wouldn't be loaded enough.

What I am trying to say is that I don't like getting a low wind and applying low voltage for low rpm and then gearing up to compensate for lack of speed.

So which would be more efficient?

1515 with lower kv and lower voltage but geared up vs
1512 with higher kv and higher voltage but lower gearing

assuming they are speced to run the same speed. It sounds like you are saying that a 1515 with more torque would be better suited for lower kv/high voltage setups vs the 1512 which might be better at higher RPMs. Since the 1515 is a stronger motor, it would seem the lower kv setup wouldn't have the cogging issues you are referring to...