Each plane is a little different and some planes will not come out of a flat spin but here goes;ENTER A REGULAR SPIN,THEN INCREASE THROTTLE SOMETIMES TO FULL,MOVE AILERONS TO OPPOSITE SIDE,SOMETIMES ALL THE WAY:Now the scary part,to recover,idle throttle,neutralize all controls,then apply opposite rudder and down elevator,usually 1 to 5 more spins and the plane will recover,add throttle and fly out of the maneuver,over the years I had one plane that wouldn't recover.