power output

[MetalMan]

Good question! My reasoning tells me 1000 RPM and 15:1 would be better.

[jollyjumper]

wouldnt it have a huge lack of torque?

[BrianG]

Electric motors have max torque right at 1rpm. The problem with running at slow rpms with a sensorless brushless motor is maybe a little cogging since there are less rpms for the controller to sense.

[jollyjumper]

thanks.
also, what would happen if you stall a 2 pole inrunner?

[BrianG]

Originally Posted by jollyjumper

thanks.
also, what would happen if you stall a 2 pole inrunner?

Lots of cogging, lots of current (no back-EMF to impede current flow), and possibly a blown controller if it doesn't know how to deal with that condition properly.

I tend to lean towards the higher rpm choice and gear down. Very slow speeds will be smoother.

Gearing down allows you to increase torque. By running the motor at a high RPM and gearing down further, you are increasing the amount of torque available at the wheels.

My vote would be 20k RPM for max torque, but 1k RPM might provide enough torque for the job and be more efficient.

[coolhandcountry]

I done some reading on the out runner in a crawler.
The man ran a mamba 25 esc in it with a little aevox motor.
He compared the combo to the power of a 55t lathe motor.
It was on rccrawler but not sure where.
I will be playing with different combos before long. I hope to know more.

[MetalMan]

I made my post based on the brushed motors that are more popular (55t lathe motors). With sensorless motors I agree that the higher RPM would be a better choice.