yak 52 flat spin recovery
The flat spin recovery in the Yak 52 I was taught by Gennadi Elfimov many years ago was - throttle shut, outspin full rudder and stick fully forward to inspin corner (full inspin aileron)-requiring both hands- as high force needed. Wait till rotation ceases and neutralize controls before negative G. This took a lot of height loss. The flat spin was usually inadvertently entered from a stall turn so I never did them low level. The sensation when flat spinning was strangely comfortable due to the high nose attitude. There are some examples of Gennas' wonderful flying on you tube.