proof enough that a barrel roll is NOT a 1-g-throughout manoeuvre. (You cannot initiate a climb from level flight without pulling more than one g.) Since Tex stated such in his interview, most pilots believe the one-g-barrel-roll must be true. Well, physics is optional for a pilot...
Well, sorta. I'd put a +/- 0.5g tolerance band on that 1g - and absolve Capt. Johnston of all sin.
