I just tried running the Castle HV-85 with my Standard Hacker (with a prop), and it started doing the prop osculating back and forth thing (POP, POP, POP...).

I tried switching one of the three wires going to the motor, changing the direction in the controller from forward to reverse and upgraded the controller firmware from 1.23 to 1.51, none of these corrected the problem.

Prior to doing this I tested the controller on my C50 Comp without a prop and it turned the motor just fine.

And recommendations would be appreciated.

Thanks,
Keith B