Sadly, even in the latter days of the early 60's at Strubby, the Meatbox caught out the experts, my QFI Flt Sgt Jock Black and his student were killed on an assymetric sortie and the CFS agent, Flt Lt Doe I think, died shortly afterwards when an engine failed just after T/O at Rissie. Everyone had their individual assymetric crit speed dependant on their leg strength and size.