I had no trouble in the p38l recovering left or right. With and with out power. I was doing power on stalls noes about 45 deg , full back until stall, then apply rudder until spin was fully developed. No ordinance 50% gas, 5000 ft entry.
Recover either power on or off was forward stick with opposite rudder. With power off, I had to apply aileron with spin.
HiTech
With power off you had to apply aileron? Consider this please. With the wing stalled, there shouldn't be any aileron authority. Other wise you could just use the aileron to keep the wing from dropping in the original stall. A spin is around the vertical axes (rudder control), not the horizontal axes(aileron control). The rudder controls the vertical axes not the aileron. I'm suggesting that when you do the power on stall. The prop blast is providing additional authority with airflow over the rudder , enough to all is allowed it the authority to stop the rotation in the spin to the right.
If you are telling me that you are able to perform a complete right spin recovery, power off, by applying full left rudder , with no additional control inputs, I can’t do that. If you review the Lockheed document on stall spin the spin recovery is through the user of Rudder , not aileron input.
As I stated, spins to the left are all recoverable, power off and just using the right rudder to stop rotation. But with spins to the right some additional authority is needed to stop the rotation. With power or aileron. I think that’s the issue. Recovery at least according to Lockheed should be the same in either direction.