On 2007-06-12 07:38:47 -0400, Bob Moore said:

Dudley Henriques wrote
Any roll performed by an airplane through 3 dimensional space is a
barrel roll by definition.

"Ah well...there you go again." Dudley.

Once again I am posting Wikipedia's (and mine) definition of a
"barrel roll". Now, would you be so kind as to post the source
of the definition that you use. BTW, William Kershner shares the
Wikipedia definition in his "The Flight Instructor's Manual.

Just point us at the definition.

Barrel roll
From Wikipedia, the free encyclopedia
In aviation, the maneuver includes a constant variation of attitude in all
three axes, and at the midpoint (top) of the roll, the aircraft is flying
inverted, with the nose pointing at a 90-degree angle ("sideways") to the
general path of flight. The term "barrel roll" is frequently used,
incorrectly, to refer to any roll by an airplane (see aileron roll), or to
a helical roll in which the nose remains pointed generally along the flight
path. In fact, the barrel roll is a *SPECIFIC* and difficult maneuver; a
combination of a roll and a loop. It is not used in aerobatic competition.

Bob Moore

I see absolutely nothing wrong with the definition you are offering
here and also see no conflict with your Wikipedia definition and my
own, which is completely in line with Bill Kershner, a man whose
manuals I have used to teach students to fly for many years.
I think you are misreading me. Either that or you are misunderstanding
what I am saying about barrel rolls and 3 dimensional space.
Anytime you roll an airplane deliberately through all 3 dimensions you
have performed a barrel roll by definition.
You can spilt rolls down into categories that-consider aileron rolls,
slow rolls, barrel rolls, and snaps. The only roll that is DELIBERATELY
FLOWN through all 3 dimensions is a barrel roll. Aileron rolls are
initiated and flown on the longitudinal axis. Any movement in pitch is
incidental to maintaining altitude. The main thing about aileron rolls
is that the roll is MAINLY being flown with aileron. The elevators and
rudder can be used of course but are simply "trimming up" the roll.
An aileron roll is classified as a 2 dimensional maneuver through 3
dimensional space.
A slow roll is also flown on the longitudinal axis of the airplane and
is considered a 2 dimensional maneuver through 3 dimensional space.
A snap roll is in a category all it's own, but is basically flown again
on the longitudinal axis of the aircraft but with rudder application to
induce accelerated stall on that axis.
A barrel roll on the other hand, is DELIBERATELY FLOWN through 3
dimensional space by control application resulting in the aircraft
changing flight path on the vertical and longitudinal axis. Throw in
the necessary forward movement of the aircraft through the roll and you
have a 3 dimensional maneuver through 3 dimensional space which I
believe is exactly what I have said :-)
I have absolutely no objection at all to you verifying this with
another credible source and reporting back to us here if that is your
wish.
I would suggest perhaps a quick email to Navy TPS might do the trick :-)
Dudley Henriques