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Old June 13th 07, 08:03 PM posted to rec.aviation.piloting,rec.aviation.student
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Default Myth: 1 G barrel rolls are impossible.

Interesting. So if I enter a coordinated turn, the G force increases.
If I enter a descent, the G force decreases.

What happens if I do both of these things simultaneously?



On Jun 13, 2:31 pm, Mxsmanic wrote:
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.




writes:
What happens to the g force acting on me as a pilot if I start in
straight and level, unaccelerated flight, and then I initiate a
coordinated turn?


The net force increases, as it results from both that induced by
gravity
(which is constant) and that induced by your acceleration torwards the
center
of the turn. In a coordinated, level turn, the force vector will be
normal to
the airframe, and so you will have the impression that you are
climbing
initially; when you finish the turn you'll have the impression that
you are
descending briefly. This assumes that you keep your head level with
the
wings.