Myth: 1 G barrel rolls are impossible.

In which the pilot always experiences "positive" G forces, but not constant
1 g. That seems to be the argument here. It varies throughout the maneuver.

mike

"Robert M. Gary" wrote in message
ups.com...

Did I miss some context? Was there a debate about this? There are
videos on youtube of people doing barrel rolls with a cup of coffee in
their lap.

-robert

Did I miss some context? Was there a debate about this? There are
videos on youtube of people doing barrel rolls with a cup of coffee in
their lap.

-robert

Ever watch the video of Our Resident Aero Commander Shrike Master Pilot pour
a glass of water/tea/lemonade with his right hand, while performing the
maneuver with his left hand on the yoke?

Bob Hoover is his name..

BT

(If there is a demand (and I can find more time) I can work out and post
the complete set of equations of motion.)

Um... I cannot visualize this. Could you produce an animated computer
graphic that depicts the flight path and g-loading throughout the maneuver?

[Just kidding!!!]

Thanks.

On Mon, 11 Jun 2007 15:05:24 -0400, john smith wrote:

(If there is a demand (and I can find more time) I can work out and post
the complete set of equations of motion.)

Um... I cannot visualize this. Could you produce an animated computer
graphic that depicts the flight path and g-loading throughout the maneuver?

[Just kidding!!!]

I'd settle for a description of the control inputs.

(also kidding)

Don

Jim Logajan writes:

Myth:

It is impossible to perform a barrel roll such that the pilot feels exactly
1 gee of force perpendicular to the floor of the cockpit.

No maneuver that involves a change in altitude can maintain exactly 1 G along
the net acceleration vector (including perpendicular to the cockpit floor).
This is not a myth, it's a fact.

The only roll you can perform that does not involve more than 1 G of net
acceleration is one that involves no change in altitude, such as a roll
precisely about the longitudinal axis. But no roll that maintains the net
acceleration vector perpendicular to the cockpit floor is in this category.

Mxsmanic wrote:
Jim Logajan writes:

Myth:

It is impossible to perform a barrel roll such that the pilot feels
exactly 1 gee of force perpendicular to the floor of the cockpit.

No maneuver that involves a change in altitude can maintain exactly 1
G along the net acceleration vector (including perpendicular to the
cockpit floor). This is not a myth, it's a fact.

Do you see the word "acceleration" anywhere in my "myth" statement? I have
no idea what it is you think you are trying to say, but it has nothing to
do with the myth I am attempting to debunk.

You appear to be confusing acceleration and force (you appear at times to
treat them as the same thing), among other faults in your thinking. If
taken literally, all your statements regarding the physics of the situation
are incorrect.

Jim Logajan wrote in
:

Mxsmanic wrote:
Jim Logajan writes:

Myth:

It is impossible to perform a barrel roll such that the pilot feels
exactly 1 gee of force perpendicular to the floor of the cockpit.

No maneuver that involves a change in altitude can maintain exactly 1
G along the net acceleration vector (including perpendicular to the
cockpit floor). This is not a myth, it's a fact.

Do you see the word "acceleration" anywhere in my "myth" statement? I
have no idea what it is you think you are trying to say,

Neither does he

Bertie

Jim Logajan writes:

You appear to be confusing acceleration and force (you appear at times to
treat them as the same thing), among other faults in your thinking.

Applying force produces acceleration; acceleration is application of a force.

But I'm not confusing anything; the confusion I see here is in others.
Apparently physics is not a part of pilot training.

Mxsmanic wrote in
:

Jim Logajan writes:

You appear to be confusing acceleration and force (you appear at
times to treat them as the same thing), among other faults in your
thinking.

Applying force produces acceleration; acceleration is application of a
force.

But I'm not confusing anything; the confusion I see here is in others.
Apparently physics is not a part of pilot training.


Apparently, But you're stil talking nonsense.

Bertie

Mxsmanic wrote:

Jim Logajan writes:


Myth:

It is impossible to perform a barrel roll such that the pilot feels exactly
1 gee of force perpendicular to the floor of the cockpit.


No maneuver that involves a change in altitude can maintain exactly 1 G along
the net acceleration vector (including perpendicular to the cockpit floor).
This is not a myth, it's a fact.

The only roll you can perform that does not involve more than 1 G of net
acceleration is one that involves no change in altitude, such as a roll
precisely about the longitudinal axis. But no roll that maintains the net
acceleration vector perpendicular to the cockpit floor is in this category.

Maybe it'll fall at 10 Gs and do me a favor.