ORIGINAL: ksechler
My approach has been to reduce airspeed and then as it stalls slam the stick back and add full rudder. I get a nose-down corkscrew. When power is added the corkscrew tightens but doesn't flatten at all. I have even tried reverse aileron to level the wing and flatten the spin, but the aileron overpowers the rudder and the plane just crabs out of the spiral.
Are you trying to ENTER a normal spin, or a flat spin, or just trying to spin?
If your "nose-down corkscrew" is not a spin, are you adding power to enter a flat spin?
The correct way to ENTER a spin is to go to a 30 degree nose up, wings level attitude, and reduce throttle to idle while maintaining that attitude until the airplane stalls; at which time add full rudder while holding the stick full back.
If your airplane does'nt spin after the first half turn, or won't spin at all, then you need to add more rudder and/or elevator throw to insure that the airplane remains in a stall. A spin is a full stall maneuver!
Adding power is part of a flat spin recovery, but not ordinarly used in normal spin recovery.
feihu