Re: 90 bank turn (Merged)
When I flew the Buccaneer, we used to fly 'head-down' toss-bombing manoeuvres dual in the Hunter T8b with a safety pilot although they would be used for real in the Bucc. If I recall correctly, we flew straight and level at around 1000 ft and 450 KIAS, then pulled up at about 3 g until reaching some specific height. The rolled to 120 deg bank, pulled round and rolled out on reciprocal heading at 500 ft above entry height.
Quite disorientating, but simple enough once you got the hang of them.