Neu motor rpm speed question for BrianG

[VintageMA]

I think we are getting a little bit away from my original point. I don't think there is a question here about LV compared with HV. It's a proven point by Ohm's law that if voltage goes up across any resistive load then current goes down (it is the resistive part of the motor which generates the heat - aside from the spinning bearings which do generate some mechanical heat).

I've easily proven to myself that running a 6S setup is much cooler than running a 4S setup due to amps pulled.

You can't really make a comparison between a 1512 and a 1515 at different kvs - the 1515 is bigger and will draw more amps.

The question is more about that happy point where you get the most efficiency out of the motor. Compare a 1515 2.5D (1650kv) and a 1515 1Y (2200kv) both running at 6S. That 36600rpm vs. 48800 rpm say geared for the same speed - which would run better.

With the Faiegos and other cheaper motors you couldn't run over 35K without major heat issues. So that is where I have been shooting for even when buying Neus. Now I am more curious what happens when you aim your peak rpms to be closer to 50k.

Both motors will have gobs of torque and the question of efficiency comes into play asking the question - which will draw more power and produces more heat:
- The slower motor with a bigger pinion, or
- the faster motor with a smaller pinion

When do you hit the point that the motor is spinning so fast with too small a pinion that it isn't loaded enough, or conversely when do you hit the point that the pinion is too large and you are over loading the motor.