Allison B-17

Maybe then they dont fly at high altitudes from airshow to airshow thus dont
need it!? (i mean the Duxford boys).
"Dale" wrote in message
...
In article ,
"M. H. Greaves" wrote:

I don't know why the turbo would "tear hell out of the engine" unless
you overboosted them...which you can do without using the turbo.

The B-17 I flew had the turbo's disconnected. By negating all the duct
work needed to feed air to the turbo we were still able to develop the
same amount of power for takeoff....so there was no loss of performance
by not using the turbo until you gained some altitude. High and hot we
sometimes were wishing the turbos were working. G I also flew a B-24
that had working turbos. We had to use the turbo's due to power loss
caused by the ductwork...and of course at higher altitudes they payed
off nicely also.

yep, but like i say, i cant remember offhand, and i think it was either
the
P51 or the P40, that had that trouble; no doubt there was a good valiud
reason at the time.
Its a similar sort of thing to the B17 at Duxford, they dont use the
turbo's
because it tears hell out of the engines; thats what i was told by a
mechanic who was working on one of the engines at the time. They were
changing an engine and needed a certain part which was still on the a/c
at
the time and the chap gave me an impromptu guided tour around it, as
well as
inside; real nice chap.
I s'pose they dont fly the B17 as much as it would normally be operated
so
they dont need the turbos and because they dont carry any heavy ordnance
these days either, what with the war being over and all that. lol
But i wonder, they obviously choose what weather they fly, as the turbo
was
used to guard against carb' icing conditions as well as many other uses
such
as more power.
I have a very interesting video i bought at an airshow called flying the
B17
and it goes into the induction system at great length, real interesting
stuff.
Wasnt there only one kind of allison engine i.e. the inline engine, or
are
you talking about the one in the C130 hercules?!
"Kevin Brooks" wrote in message
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--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html