Anyone recognise the author/subject/significance of these
documents/pictures from the early 1950s?
http://www.XJ13.eu, XJ13 in-progress, 1962 S1 FHC
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In reply to a message from V12 Racer sent Tue 9 Aug 2011:
Looks like evidence of a V8 they developed for military
application that never got into production.
Here’s something I posted to jag-lovers back in '94.Date: 25 Feb 1994 11:14:16 -0600
From: ‘‘Rob Reilly’’ [reilly@admail.fnal.gov]
Subject: V8 Jaguar engine
To: ‘‘Jag Lovers’’ [jag-lovers@psy.uwa.edu.au]
Subject:
Time:8:29 AM
V8 Jaguar engine Date:2/25/94
And now for something completely different. And really obscure.
Jaguar actually did make a V8 once. It was reported in
‘‘Automotive Industries’’ magazine, dated November 15, 1954.
There is a photo and a paragraph:
Quote:
‘‘Designed principally for armored military vehicles, this
new V-8 non-supercharged gasoline engine, built by Jaguar
Cars, Ltd., develops 320 bhp at 3750 rpm. Cylinders are set
at 90 deg, while a bore and stroke of 4.50 in. and 4.33 in.,
respectively, give a total piston displacement of 550 cu. in.
There are two inlet and two exhaust valves per cylinder, and
four overhead camshafts. This powerplant has been completely
sealed and waterproofed for operation under all kinds of
conditions.’’
Unquote.
From the picture it looks like a pair of 4 cylinder versions
of the XK head (with slight differences from the XK100),
twin downdraft carbs that might be two-barrel Solexes with
snorkel air intakes, and with spark plugs, wires and
distributor completely hidden and sealed up. No fan or
V-belt, the water pump is driven directly from the timing
chain. Looks like it could run underwater. I
suppose it never made it to the production stage, and that’s
why it never got into the history books.
Walter Hassan, in ‘‘Jaguar V12 Engine, its Design and
Background’’, wrote that a V8 was considered but not pursued
because a V8 (quote)‘‘needs a two-plane crankshaft with wide
outer crankshaft balance weights to eliminate its
out-of-balance couple. The bank-to-bank firing sequence
imposes severe limitations upon the achievement of an
efficient induction system if carburetters are used. The V12
is inherently free of primary and secondary out-of-balance
forces.’’ That and the market appeal of the V12 in the US.
Unquote again.
Rob (the pedant) Reilly
(Now the trick will be to find that old magazine and scan
it. We didn’t have scanners back in '94. I know I didn’t
throw it out, so it must be in my old filing cabinet.)
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
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In reply to a message from Rob Reilly sent Wed 10 Aug 2011:
My thoughts as well Rob.
The drawings were made by Claud Baily and the handwriting is definitely his. It seems to me the
drawing of the 18 litre V8 at the top of this document may have been a representation of the ‘‘Rover
Meteor’’ 18-litre military V8 (the unusual drive to the oil pump and cams is a bit of a giveaway.
The smaller-capacity ‘‘Jaguar V8’’ drawing looks like some of Baily’s early ideas on a possible
military engine to compete with for the contract against Rover.
I have a copy of Wally Hassan’s paper and, although he says, ‘‘a V8 was considered but not pursued
because a V8 needs a two-plane crankshaft with wide outer crankshaft balance weights to eliminate
its out-of-balance couple’’, Baily was completely aware of this in 1951. If you look at this document
http://www.xj13.eu/xj13/militaryv8.jpg
you will see he considered a two plane four-throw crankshaft where, ‘‘no unbalanced forces or couples
are obtained’’.
Yes - he proposed using two XK 4-cyl heads (handed) as you suggested.
If you can find and scan that magazine I would be very interested and grateful.–
http://www.XJ13.eu, XJ13 in-progress, 1962 S1 FHC
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Here is the magazine photo and paragraph.
http://www.jag-lovers.org/v.htm?1313328851
I wonder if this engine is still sitting in a back corner of Brown’s Lane,
anybody know?
Rob Reilly - 679187
…& with that bore & stroke, it probably develops 640ft/lbs of torque or
more. Them tanks done be heavy metal.
Regards, Otto M.
In a message dated 8/14/2011 07:55 Eastern Daylight Time,
xk120us4@sbcglobal.net writes:
http://www.jag-lovers.org/v.htm?1313328851
In reply to a message from Ottman0401@aol.com sent Sun 14 Aug 2011:
Thanks for posting! Looks like Claude Baily’s 1950/51 sketches
were of this engine.–
http://www.XJ13.eu, XJ13 in-progress, 1962 S1 FHC
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In reply to a message from V12 Racer sent Mon 15 Aug 2011:
If I recall correctly, a version of that engine was used in some
sort of Jaguar powered water speed record speedboat in the 50s or
early 60s.
Karl–
karl
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In reply to a message from karl sent Mon 15 Aug 2011:
I am aware of a power boat that used FOUR XK100 4-cyl
engines but not this V8 leviathan? I think its use was
limited to the military.
http://classicoffshore.com/history_bad_boys.php
QUOTE …
‘‘Dr Emil Savundra…Boss of the Fire and Marine insurance
company entered the Cowes Torquay in 1962 with Jackie S
powered by three Chrysler inboards. This Cyril Hughes design
was unusual in that there was no superstructure, the
following year though he returned with a cabin and
wheelhouse and the hull stuffed full with 4 Jaguar engines
totalling 1000hp. Jackie had stability problems and the good
Doctor�s boat first climbed on to the deck of Don Shead�s
TRIDENT, then proceeded to hit a small converted ships
lifeboat called the Skipjack amidships, Skipjack sank under
the weight and all aboard scrambled onto Jackie. Once safely
transferred Jackie set off again but luck was not on the
Doctor�s side as this time the Needles lighthouse was the
target of her amorous advances, luckily hitting the base at
a mere 10mph and causing little damage to either party and
retired.’’–
The original message included these comments:
If I recall correctly, a version of that engine was used in some
sort of Jaguar powered water speed record speedboat in the 50s or
early 60s.
–
http://www.XJ13.eu, XJ13 in-progress, 1962 S1 FHC
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