"Grumman-581" writes:

I accidentally did a snap roll in an S2B once... 90 degree turn at 90
degrees of bank, *quite* a few Gs in the process... Accellerated stall while
banked 90 degrees, but the ball wasn't quite centered...

It's impossible for a 90-degree turn to be coordinated--such a turn
would pull infinite accelerations.

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