[Justin Stiltner]

Well just a rough calculation shows that if the atwood was turning 2.4x its rated speed it would generate around 24 VOLTS.... also the bearings in that motor are probally not designed to do that kind of speed... it would be WELL worth your time to design a way of takeing it out of the gear train. have a servo push its spur gear on the shaft with one huge keystock in it when it shifts the drill.... also when you do this it is going to take alot of power to keep that atwood spinning that fast.. and that power is going to be robbed from your wheels. and one way sleeve clutches arent very expensive at all... if you can afford the gears to do this then you can easily afford a clutch for it.

I would only evean attempt this if I had lots of spares of the motors, speed controllers, relay modules, and the RC.