It was rumoured that Ron Gilman took a Vanguard beyond the buffet on a base training detail which caused it to invert. The resulting high airspeed on the recovery led to a twist in the fuselage - or at least that is the story I was given to explain why that particular aircraft was almost impossible to trim properly!
Last edited by Meikleour; 6th Jan 2018 at 16:16.
Reason: withdrawing info