Originally Posted by
Timbo
Nope, I just got the nose 15 degrees up before I started the roll, and let it come down as we rolled. About 1/2 a positive G all the way around. I didn't realize he had a cup of coffee in his hand when I started, or I would have told him to finish it first! But he asked me to show him what they were teaching me in the T38, so I did.
Watch Bob do it here, I don't consider this roll to be a Barrel Roll, but a simple aileron roll, notice how he starts nose up, and just lets it fall through:
POURING ICE TEA WHILE FLYING INVERTED - YouTube
It could be considered a barrel roll I guess. In the T38 the aileron roll was just a flick of the wrist, while the barrel roll was a much more roll off, pull up and around type of thing. In the Turbo Commode I didn't pull it all the way around, I just used ailerons only, no back stick, and I started nose up because I didn't want to fly it upside down (or go zero G) knowing there aren't fuel sumps at the top of the tanks. For further reading, before attempting this on your next flight:
Roll Around a Point: Aerobatics: Duane Cole: 9780911721287: Amazon.com: Books
I've done plenty of aileron rolls and barrel rolls in the -38 and F-15.
If your buddy's coffee didn't spill then you did some form of barrel roll. A simple aileron roll is a roll on a point (the a/c nose should remain fixed or at least very close to the point) and it would be impossible to avoid spilling the liquid during the inverted portion of the roll since the pilot is inducing little to no positive G in order to roll on the point. The fact that you say you had a 1/2 G all the way around means it would have been impossible for your nose to stay on a point - therefore, no aileron roll.
I suggest you read Bob's book. He himself describes the ice tea maneuver as a barrel roll (pg 261). Clearly, the video you posted show his nose scribing a circle rather than staying on a single point which is exactly what a 1G barrel roll should look like.