Bertie the Bunyip wrote:
Dudley Henriques wrote in
:

Bertie the Bunyip wrote:
Dudley Henriques wrote in
:

Bertie the Bunyip wrote:
Dudley Henriques wrote in
:

Bertie the Bunyip wrote:
"Blueskies" wrote in
. net:

LeVier did a lot of the high mach number dive tests in the 38,
and there definitely was a compressibility problem, mach tuck;
the
whole
works. I know they added speed brakes but not sure at exactly
what stage. The engine rotation switch was early on in the
program according to Ethell; I believe in the YP38 stage before
the first production run. If I'm not mistaken, the high mach
dives came after the switch but I'm not at all certain of that.

--
Dudley Henriques
All the -38s sold to England had same rotation direction engines
on both sides all the way through. Just another odd thing...


Are you sure about that?


Bertie
I heard the same thing. The Brits raised hell about what they
considered
a high degree of possibility for unnecessary maintainence due to
the handed engines. On the practical side, the Brits had ordered a
ton of P40's which used the V1710 Allison with a right handed
prop. The word
we
got was that the brits wanted the Allison's on the 38's to be
interchangeable with the P40 to cut down on cost.


Well, that's reasonable. Never heard that before. Could be an urban
legend based on one photo of an airplane field kitted with two RH
engines. A bit like the Fokker DR1 that got an odd aileron and
started a legend that they all had one smaller than the other to
compensate for torque.


Bertie
Possible?? Torque correction IS in roll and not yaw as is the common
belief :-)

Oh the things had torque issues alright, but some nerd of an
historian has proven that there was only one DR1 with mismatched
ailerons. The eraly ones had one size and the later ones had another
and a field repair resulted in the one with two odd ailerons. Since
it was a good pictiure showing them clearly and someone did a
detailed drawing basd on it, it got lodged in folklore. There were
airplanes that had larger wings n the left for this purpose however.
Ansaldo, for one.


Bertie
I guess the WW1 practical test for German AI's missed "aileron
mismatch"
:-))


Wouldn't be the first or last time! I had two very different wings on a
Luscombe with two completely different aileron hinge arrangements. It
was a very early 1939 airplane and it must have damaged a wing and one
was put on from a later machine.
There's a famous pic of a DC-3 that was dmamged and flown for a time
with a DC 2 wing, which was considerably smaller.. Early days of WW2 in
China, I beleive.

Bertie
I think I remember that DC3 shot. Lots of spare parts birds out there.
Many civvy Mustangs were retrofitted with P63 brakes if that counts :-))

--
Dudley Henriques