Allison B-17

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
...

"M. H. Greaves" wrote in message
...
Cant remeber exactly but werent the allison engines unsuitable because
they
were no good above a certain altitude!?

The P-38 had a ceiling of forty thousand feet with Allison inlines.

Brooks

"Stephen Harding" wrote in message
...
Saw a photo yesterday of a WWII B-17 test aircraft powered
with four Allison inline engines as opposed to the usual
Wright Cyclones.

Understand the modification added about 800 hp to the
aircraft.

Anyone know why the modification didn't go anywhere?
The usual suspects? Too much disruption to B-17
production? Engines needed by P-38, P-39, P-40?

Sorta "Lanc looking".


SMH

personally i like the B17 with its Wright cyclones. But, each to his own,
no offence meant.
"Mark and Kim Smith" wrote in message
...
Jonathan Stilwell wrote:

"Stephen Harding" wrote in message
...


Saw a photo yesterday of a WWII B-17 test aircraft powered
with four Allison inline engines as opposed to the usual
Wright Cyclones.



That would be the XB-38, the ninth production B-17E (41-2401) modified by
Vega with Allison V-1710-89 engines. According to "US Bombers" by Lloyd
Jones, the changes showed an increase in top speed of 10 mph over the
B-17E,
with new increased wing fuel tanks giving a range of 3600 miles. The
aircraft was lost on 16 June 1943, 29 days after it's first flight, due
to
an in-flight fire.



Anyone know why the modification didn't go anywhere?
The usual suspects? Too much disruption to B-17
production? Engines needed by P-38, P-39, P-40?



The latter reason is the one given in the book.

Jon.




Sure is smooth lookin'!!
http://www.wpafb.af.mil/museum/resea...bers/b3-87.htm

"M. H. Greaves" wrote in message
...

Wasnt there only one kind of allison engine i.e. the inline engine, or are
you talking about the one in the C130 hercules?!

Allison was the name of an engine manufacturer that made a
wide range of engines. IRC its now a subsidiary of RollsRoyce

Keith

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
...

--
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

Keith Willshaw wrote:

"M. H. Greaves" wrote in message
...

Wasnt there only one kind of allison engine i.e. the inline engine, or are
you talking about the one in the C130 hercules?!

Allison was the name of an engine manufacturer that made a
wide range of engines. IRC its now a subsidiary of RollsRoyce

There is an Allison transmission division of GM that still makes
[very good I understand] truck transmissions.

Is this a different Allison than the WWII engine maker?


SMH

Stephen Harding wrote:
Keith Willshaw wrote:
"M. H. Greaves" wrote:

Wasnt there only one kind of allison engine i.e. the inline engine, or are
you talking about the one in the C130 hercules?!

Allison was the name of an engine manufacturer that made a
wide range of engines. IRC its now a subsidiary of RollsRoyce

There is an Allison transmission division of GM that still makes
[very good I understand] truck transmissions.

Allison manufactures heavy-duty automatic transmissions (for lazy,
limpwristed city bus drivers). Rockwell dominates the market for long
haul, over-the-road truck transmissions that requires manual shifting.

Is this a different Allison than the WWII engine maker?

It's the same company. Allison (and Rockwell) are heavily involved
in the aviation industry.

In article ,
Stephen Harding writes:
Keith Willshaw wrote:

"M. H. Greaves" wrote in message
...

Wasnt there only one kind of allison engine i.e. the inline engine, or are
you talking about the one in the C130 hercules?!

Allison was the name of an engine manufacturer that made a
wide range of engines. IRC its now a subsidiary of RollsRoyce

There is an Allison transmission division of GM that still makes
[very good I understand] truck transmissions.

Is this a different Allison than the WWII engine maker?

Nope, they are the same people, the Allison Division of
G.M./Rolls-Royce.

Allison also Diesel engines for use in tractor-trailers & other such
applications. You can easily pick 'em out by ear, they've got a
distinctive high-frequency scream in their engine note.

--
Pete Stickney
A strong conviction that something must be done is the parent of many
bad measures. -- Daniel Webster

(Peter Stickney) wrote:

Allison also Diesel engines for use in tractor-trailers & other such
applications. You can easily pick 'em out by ear, they've got a
distinctive high-frequency scream in their engine note.

I'm not aware of any Allison diesel engines used in semis. The Big
Three truck engine manufacturers are Caterpillar, Cummins and Detroit
Diesel. Going down the road, you can't differentiate between the three
by the sound alone and I suspect the high-freqency scream you're
referring to is simply the turbo.

Mike Marron wrote:

(Peter Stickney) wrote:





Allison also Diesel engines for use in tractor-trailers & other such
applications. You can easily pick 'em out by ear, they've got a
distinctive high-frequency scream in their engine note.



I'm not aware of any Allison diesel engines used in semis. The Big
Three truck engine manufacturers are Caterpillar, Cummins and Detroit
Diesel. Going down the road, you can't differentiate between the three
by the sound alone and I suspect the high-freqency scream you're
referring to is simply the turbo.



Stick International in there. You can't look out your car window
without seeing something powered by a DT466E. Yup, no such animal as an
Allison diesel. But plenty of World transmissions! As far as noise,
you can tell a 6V-8V 92 from others, but that's because it's big, dirty
and ugly! Most days now though, the manufacters make all of them sound
like purring kittens! Until that Jake Brake wakes you up in the middle
of the night.

either that or he's got a woman in the cab with 'im!!! lol
"Mike Marron" wrote in message
...
(Peter Stickney) wrote:

Allison also Diesel engines for use in tractor-trailers & other such
applications. You can easily pick 'em out by ear, they've got a
distinctive high-frequency scream in their engine note.

I'm not aware of any Allison diesel engines used in semis. The Big
Three truck engine manufacturers are Caterpillar, Cummins and Detroit
Diesel. Going down the road, you can't differentiate between the three
by the sound alone and I suspect the high-freqency scream you're
referring to is simply the turbo.