Bob Moore wrote in
46.128:

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.


Pretty much correct. Here's the IAC's definition...

The Barrel Roll is a not competition maneuver. I The barrel roll is a
combination between a loop and a roll. You complete one loop while
completing one roll at the same time. The flight path during a barrel
roll has the shape of a horizontal cork screw. Imagine a big barrel,
with the airplanes wheels rolling along the inside of the barrel in a
cork screw path. During a barrel roll, the pilot experiences always
positive G's. The maximum is about 2.5 to 3 G, the minimum about 0.5 G.

You're like the proverbial three blind men examining an elephant
(Mxsmanic would be the fourth examining it's pile of dung)


Bertie