On 2007-06-18 12:51:04 -0400, Bob Moore said:

Dudley Henriques wrote
This completely opens the Pandora's box on the issue of barrel roll,
which is then dealt with as moving the aircraft through all 3
dimensions as tightly or as loosely as the envelope will allow.

Dudley...just point us to a reference that states the above. :-)

I have posted several of my references in the past, waiting on you.

Bob Moore

Quite frankly Morre, I don't believe you really want references at all,
but rather references YOU agree with. :-)
You seem to enjoy quoting Bill Kershner, who is a source I highly
respect and have used for many years.
Considering this, I have gone to the DL (dusty library) room up here
and dug out a Kershner source on this for you.
If you go to page 289 in Bill's "Flight Instructor Manual" third
edition, you will find a section on Barrel Rolls.
If you read that section through, you will notice that Kershner first
treats the issue of Barrel Roll in the Classic manner that asks for the
90 degree heading change at the inverted point half way through the
roll.
Now read on a bit further to where Bill summerizes the issue of Barrel
Rolls. On page 290, down at the bottom of the page, start reading where
Bill writes;
"ANOTHER METHOD OF DOING A BARREL ROLL"
This section completely explains in plain English what I have been
telling you since God knows when about barrel rolls; that what YOU are
describing as a barrel roll, is simply the way barrel rolls are taught
as a precision maneuver by many training programs (including the Navy
BTW).
All I have been trying to explain to you from the gitgo is that this is
NOT the only way a barrel roll can be performed AERODYNAMICALLY. What
you have been describing as a barrel roll is nothing more or less than
ONE PROCEDURE by which a Barrel roll can be performed.
If you like, I will be most happy to fly with you in a Decathlon at any
time you desire and SHOW you a barrel roll with a 90 degree change of
heading at the inverted point........an 80 degree change of heading at
the inverted point......a 70 degree change of heading at the inverted
point....and so on, right down to the maximum helical arc the Decathlon
is capable of managing. YOU of course can pay for the flight :-)
I of course will buy the drinks :-)))
Dudley Henriques