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Old June 14th 07, 02:01 AM posted to rec.aviation.piloting
Bertie the Bunyip[_2_]
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Posts: 896
Default Myth: 1 G barrel rolls are impossible.

Mxsmanic wrote in
:

writes:

Got it. What happens to the g force acting on me as a pilot if I
start in straight and level, unaccelerated flight, and then I use
down elevator and enter a descent?


As you descend, you are accelerated downward. This acceleration is
subtracted from the constant acceleration imposed by gravity. If your
acceleration downward is less than 1.0 G, you experience a diminished
G force, unchanged in direction. If it is equal to 1.0 G (which would
be quite a feat), you will experience no G force at all. If it is
greater than 1.0 G (unlikely indeed), you'll feel a negative G force
tending to lift you out of your seat. These changes persist only for
as long as you are accelerating downward; once you are descending at a
steady rate, you will again experience exactly 1.0 G.

The latter circumstances are unlikely because accelerating downward at
1.0 G would give you a descent of 1920 fpm after one second, 3840 fpm
after two seconds, and so on.


Nope, you're an idiot.


Bertie