[kennybobby]

You could make a "pony-brake" dyno just to see if this thing will turn like a motor and make any torque.

Mount a simple V pulley on the shaft and use a piece of 1/2" rope in the groove to apply load as the motor turns. Or mount a smooth cylinder to the shaft and wrap a turn of rope. Apply tension to the rope to load the motor.

i'm thinking this alter-design will stall at a very low torque and not be effective or efficient as a motor.

 

[kennybobby]

How much does your 4 wheeler weigh when loaded? How fast do you want to travel, and how quickly or slowly do you want to accelerate up to speed?
What size battery pack will you use? From that you can calculate your power requirement.

Good find on the sensorless controller article, interesting to read.