Just to add to all of this about if a barrel roll is a 1G maneuver, which I
don't think it is, I was watch a Military Channel show on Boeing and
the -80/707 and Tex Johnston was talking about the barrel roll he did and
said it was a 1G maneuver.




"David CL Francis" wrote in message
...
On Wed, 22 Jun 2005 at 20:09:25 in message
, Bob Moore
wrote:
The Barrel Roll is a not competition maneuver. 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.

That must of course be correct. To describe an actual horizontal helix
would require a lot of smooth changes in g and in necessary control
deflections, otherwise the helix would not be circular in cross section.

However perhaps there could be a manoeuvre that combines a roll with a
constant 1 g pressure on the crew?

My guess is that it would turn into rather odd sort of spiral dive. The
nose would certainly fall below a level flight path!
--
David CL Francis