^^ Dad's right.

I just set it up on the slider and and move the slider up until I get the motor spinning before takeoff. I leave it there the entire flight.

Sometimes when I land and throttle all the way back the motor stops and I'm not really sure why. I can't really tell a difference in the air and you don't want to speed the motor up too much because it will screw with your downlines. As far as I know just keep the motor "idling" as low as you can to get the best downline braking.