T o d d P a t t i s t wrote:
If you pull high G, you can probably get the 90 degree turn
done with wings vertical in 1 to 2 seconds. The whole time
you are "falling" (or slowing your climb) and this requires
the aircraft to change it's vertical velocity by about 1800
to 3600 ft/min (ignoring drag). Not easy, but barely
possible in an aerobatic aircraft. Then you roll out and
recover.

In the S2B, the maneuver was to snap to a 90 degree bank, pull back on
the stick for a 90 degree turn, then snap back level, and then snap to a
90 degree bank in the other direction... Even if you completely discount
the lift generated by the fuselage while in the 90 degree bank, the
altitude deviation is not extreme... Theoretically, if you did it within
a second, you only lose 16 ft... If you do it within 2 seconds, you lose
64 ft... If you do it within 3 seconds, you'll lose 144 ft... At 2000 ft
and high Gs, you don't really notice a loss of that little... You do
kind of notice being in a spin a 2000 ft though...