Myth: 1 G barrel rolls are impossible.

Hang on, let's keep things simple:

1. If I enter a coordinated turn, I experience an increase in Gs.
2. If I enter a descent, I experience a decrease in Gs.

If I do these two things at the same time, it is possible to enter a
descending turn without any change in Gs. Just as long as I
continously feed in enough down elevator to offset the increasing Gs
from the turn, the force on the airframe and me, the pilot, will stay
at 1 G.

Of course, all combinations are indeed possible. But this interesting
special case of the situation exists, doesn't it, in which there is no
change in the force felt by the pilot?


On Jun 14, 3:36 pm, Mxsmanic wrote:
writes:
'Some combination', 'several possibilities.' I'm confused by this -
can you be more precise? What are the possibilities?

You can move and accelerate in any combination of three dimensions, with any
combination of acceleration rates, almost. You have to calculate the
direction and magnitude of the net acceleration vector to determine exactly
how much force is acting upon the pilot, and in which direction.

Some of it is (or should be) intuitive. For example, if you turn the aircraft
to the right, you'll be accelerated to the right.