sensorless or sensored

[BrianG]

A sensorless controller can run both sensored and sensorless motors. A sensored controller can only run sensored motors.

A sensored motor has a Hall-Effect sensor (hence the name "sensored") inside the motor. This sensor picks up the rotor position and sends it to the ESC via a few small wires. A sensorless controller uses feedback on the main motor wires to pick up the rotor position. So, construction of a sensorless motor is simpler and has only the 3 main motor wires.

A sensored setup is basically free from cogging (where the motor jitters because it doesn't know where the rotor is). Older sensorless had cogging issues, but today's controllers are much better and only cog if going very slow AND are loaded heavily.

So, the 9920 can run pretty much any 2-pole brushless motor as long as the current draw is at or preferably under the rating of 99 amps.