"Jim Baker" wrote in message
...

"vincent p. norris" wrote in message
...
As for what they're capable of, remember Tex Johnson(sp?) barrel
rolled
the 707 prototype (the "Dash-80").

Actually, an aileron roll, Paul. I know his book, ghost written by
another, says barrel roll, but the tape shows it's an aileron roll.

Among non-fliers, all rolls are "barrel rolls," just as all loops
are
"loop-de-loops" and among Southerners, all Northerners are
"Damnyankees."

vince norris

Vince...everyone is entitled to their opinion. I've seen that tape
numerous
times and I've done and taught several hundred aileron rolls (23
continuous
ones once in a T-38) and barrel rolls. The 707 prototype that day
over Lake
Seattle did not do an aileron roll, it was a barrel roll. He dove, he
climbed and he did a constant "speed" roll about a point which is
close to
the definition of a barrel roll as I can get without a book in front
of me.
An aileron roll is a roll about the longitudinal axis of the aircraft.
He
did not do a 360 roll around the longitudinal axis.

Regards,

JB

I almost hate to get into this one again, as the last time was quite
unpleasant! :-)
It was a barrel roll. The -80 needed positive g all the way around for
the oil scavenger pumps. Tex knew this and I discussed it with him many
times through the years. Also, the airplane, regardless of how high the
roll set would have been and regardless of the airspeed at entry for a
pure aileron roll , would not have had the energy available through the
roll axis to complete an aileron roll without split S'ing out the back
side. The result of a pure aileron input would have been a HUGE split S
with serious airspeed problems on the back side!.
Tex did the roll the only way the airplane could have been rolled. He
FLEW it all the way around the barrel, keeping positive g on the
airplane throughout the maneuver for the oil pumps and to avoid the
split s.
Tex flew the prototype through a 3 dimensional roll at positive g , and
that spells barrel roll.
All the best as usual,
Dudley