The Hawk certainly is spun (intentionally) from a 30deg bank turn, according to the Aircrew Manual, to help it go as intended (left bank = left rudder = spin to left).
I would say that individual Hawks will often only spin in one direction and will often merely sit in a stall, with the speed increasing, as you plumment earthwards. Folklore says it spins better to the left.
Previous experience would say that the spin direction is not dependant on bank direction (does this help?), but upon what is happening at the time. I would guess it depends upon the strength of the rudder to control the roll, and when/whether the wings stall. I can't see why you cannot enter a stall from either skid or slip, since autorotation is, I believe, the key.
Having said all that I'm not a TP, only a QFI, so my normal answer would be "good question Bloggs - go away and find out, then come and tell me"
I would also agree that Darrol Stinton's book is rather useful. I shall go and refer to it now...
So, anyway, what about inverted spinning?
