Thanks, I'd missed that one.
As for my father's aircraft - he designed bits of obscure British jet fighters, goodness only knows what the spinning characteristics of the Supermarine Attacker were !
Incidentally, I don't think in a fair number of years of bouncing off the subject, I've ever come across a really useable theory of the spin recovery (i.e. determining how well a particular aircraft will recover from the spin, and under which conditions) - it's one of the great holy grails of aerodynamics so far as I'm personally concerned.
G