Re: Seafire conversion of Spitfires in the 1940s
First of all spirfires were always tail heavy and always flew with down trim. In fact being on the edge of pitch stability makes for a very very sensitive set of controls. An advantage in a fighting machine which is why modern typhoons are trimmed that way, and use software to compensate
The addition of more weight to the back simply made matters worse.
Ultimately spin recovery depends on getting the nose DOWN. Opposite rudder may get rid of the turn but unless the aircraft left to itself at almost no airspeed will put its nose down then you will fall off into a spin in the other direction.