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

Mxsmanic wrote in
:

Viperdoc writes:

That's the point you idiot- there is no change in direction during a
vertical roll.

You cannot change the attitude, direction, altitude, etc., of the
aircraft without changing its direction in some plane, and that
requires acceleration.


Nope, yer, wrong, fjukktard. Again


Bertei

writes:

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

More specifically, the G force induced by gravity is constant. As you
accelerate the aircraft by changing its direction, the total G force and its
direction acting upon you as the pilot also changes. You cannot eliminate
gravity, so there are some things that are impossible: for example, in level
flight, you cannot make a coordinated turn with a 90-degree bank, because that
would require a vertical component of zero in the acceleration forces acting
upon you, and the presence of gravity prevents that.

When you enter a coordinated, level turn, the G force you feel increases, but
its direction does not change. If you enter a descent, the G force diminishes
as you accelerate downward (your downward acceleration being subtracted from
the force of gravity), and then returns to 1.0 once your vertical speed is
constant.

What happens if I do both of these things simultaneously?

You get some combination of the above; there are several possibilities.

mike regish writes:

Why?

It's hard to maintain a downward acceleration of 1 G in any aircraft,
especially a small, non-aerobatic aircraft.

Mxsmanic wrote in
:

writes:

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

More specifically, the G force induced by gravity is constant. As you
accelerate the aircraft by changing its direction,


That what happened to you?

oop, syou don't fly.


BTW Anthony, what's the deal with you going bankrupt? personal choice, was
it?



bertie

Mxsmanic wrote in
:

mike regish writes:

Why?

It's hard to maintain a downward acceleration of 1 G in any aircraft,
especially a small, non-aerobatic aircraft.

How would you know, fjukkwit, you don't fly.


Bertie

Didn't say anything about maintaining it. It is easy to attain zero g in an
airplane. And if you start out with a steep climb, you can sustain zero g
for several seconds easily. I know because I do it all the time. My kids
love watching their soda bottles floating up in front of them.

mike

"Mxsmanic" wrote in message
...
mike regish writes:

Why?

It's hard to maintain a downward acceleration of 1 G in any aircraft,
especially a small, non-aerobatic aircraft.

In article ,
says...
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.

No you are not - not relative to "self" (not the earth). Yer a moron.

Relative to yourself - in the plane - you can do a 1G roll (not a very
tidy one, and not one you'll see in the books). The 'book' describes
(as has been written here already), typically a descent to build
airspeed, then a climb and bank, then into it and over and recover
level.

To put it another way, if you closed your eyes, you wouldn't know you've
done a roll (given you go for the 'non-standard' 1G roll), other than
the initial sensation of beginning the turn, and then the sensation of
the turn stopping.

--
Duncan

Actually, with him, it's more like trying to breathe under water. What an
idiot.

'Some combination', 'several possibilities.' I'm confused by this -
can you be more precise? What are the possibilities?


writes:
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 14, 1:49 am, Mxsmanic wrote:

You get some combination of the above; there are several possibilities.