February 9th 08, 07:44 PM
posted to rec.aviation.piloting,rec.aviation.student
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Why airplanes fly
Dudley Henriques wrote in
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Bertie the Bunyip wrote:
Dudley Henriques wrote in
:
Bertie the Bunyip wrote:
Dudley Henriques wrote in news:lJ-
:
WingFlaps wrote:
On Feb 8, 12:20 pm, Dudley Henriques wrote:
Interesting story and I can well believe he could have broken the
barrier as described. I also heard that the X1 was in fact
designed
by
the British and given to the Americans, along with data, due to
the
expense of the British supersonic program and problems with
repaying war debt. Do you know anything about that -I once saw a
old picture
of
an "X1" in the UK but can't find it now.
Cheers
To my knowledge, the X1 was a request research project from the
old
NACA
(now NASA) to Bell aircraft for an aircraft capable of making the
attempt to break the speed of sound.
I've never heard any mention of a design from the Brits.
Yeah, it was a Miles aircraft. The M-52
They got as far as a mockup but dropped the project. It had a
stabiliator and the brits are fond of whining that it was that
development on the X! that enabled it to break the sound barrier.
However, this was not a Brit innovation. As usual, the germans had
realised that in the thirtie, years before Miles..
Actually, the
design concept was quite simple. They did the entire aircraft
based
on ballistic tests with a 50 Cal. bullet even to taking the canopy
out of the equation and replacing it with molded in windows.
Based on the ballistic tests of the 1/2 inch bullet, Bell
designers
expected the same transonic performance from the X1 provided they
could
get it up to speed.
The horizontal tail proved to be the only real issue and they
changed that to a slab tail to solve the shock issue.
The F86 prototype was having the same problems at the same time in
dives.
It's interesting that North American added a stabilator to the 86
later
on in it's production run but to my knowledge George Welsh who
broke
the
barrier the week before Yeager had a regular tail on the prototype
which
was carried through to the first A Sabre.
Yeah. A stabilator or at least a rapidly trimmable stab is
essential
for a transonic aircraft o avoid excessive buffeting on the stab
due
to camber introduced through moving elevators up and down..
Bertie
The way I heard the story from a few guys who were at Edwards during
the period was that there was information passed back and forth
between the Brits and bell about the Miles project but it was the US
that stopped trading out data due to the Brit program getting bogged
down.
Just as well considering their complete inability to keep thier
intelligence services under control.
I know a lot of what the Brits had in research being done early
on at Boscombe Down came out of the German research, and you are
right
about Lippisch. He was a genius. His work on tailless stuff is still
considered important.
As for the slab tail. I hate to admit it, but Bell I think might
very
well have lifted this idea from the Miles project and incorporated
it
into the X1. The shock issue at the hinge on the horizontal
stabilizer
was common knowledge and a solution was really needed for the X1.
That whole period was involved a ton of stolen ideas back and forth,
and some of it really started back in the German research. Those
guys
were a fair bunch of aerodynamic brains :-))
Well, nothing was created in a vacuum! Everything was ripped off and
built upon ultimately.
Lots of cloak and dagger stuff going on back then....probably would
make
a great movie plot :-)
Heh! It mostly came down to who's germans were better!
Bertie
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