[ROVERNET - UK] Slightly OT but not quite

[rweasel at gmail.com]

Rover was paired with Rootes for manufacturing the Hercules engine, or
parts under the Shadow Factories scheme.

On 3/7/06, Paul Smith <Paul.Smith at auroraenergy.com.au> wrote:
> Yep it is a wonderful design that needed minor refinement.  There is a bad
> pocket above the exhaust valve, and the piston doesn't present the full area
> to early expansion (reduces torque in early part of power stroke).
>
> PVS
>
> -----Original Message-----
> From: rovernet-bounces at lyris.ccdata.com
> [mailto:rovernet-bounces at lyris.ccdata.com]On Behalf Of Kent Kinard
> Sent: Wednesday, 8 March 2006 10:45 am
> To: rovernet at lyris.ccdata.com
> Subject: Re: [ROVERNET - UK] Slightly OT but not quite
>
>
> Oh well, my email program decided to send that last bit before I was
> finished...
> F-heads have broad, flat combustion chambers what present problems with
> flame propagation and their exhaust valves are necessarily shrouded by
> the cylinder head.  The Rover IOE has a very compact, almost "perfect"
> hemi combustion chamber with a relatively unshrouded exhaust valve.
>
> Roverly,
> Kent K.
>
>
>
> iudkuy wcygiohs wrote:
>
> > According to James Taylor's book "Rover P4 The
> > Complete Story", the engine was originally designed in
> > the mid-thirties as a V6 by Rover's Chief Engine
> > Designer.Because of the width of thirties cars'
> > bonnets he "angled the cylinder heads so that the
> > rockers for the overhead inlet valves would be on top
> > of the engine and would not increase its width."
> >
> > RR seems to have been working on a similar design for
> > their in-line engines at the same time, but their
> > concern was an inability to reliably cast heads for
> > the small six cylinder cars with predictable
> > waterways. Their F-Head engines were much larger than
> > Rovers, the smallest being 4257cc and the largest, a
> > straight 8 of 5675cc.
> >
> > Thanks for giving my library a workout
> >
> > Peter B
> >
> >
> >
> > Jack Swaine --- JOHN
> > <john.at.hulverstone at btinternet.com> wrote:
> >
> >
> >>I heard many years ago, that the engine in the P4
> >>was
> >>designed by R.R. but I hadn't heard of any being
> >>made
> >>for R.R. by Rover. That P.4 engine was used in some
> >>London black cabs
> >>best wishes
> >>John
> >>--- Ray <raywilkins at optusnet.com.au> wrote:
> >>
> >>
> >>>I have just bought the February edition of the UK
> >>>mag 'Classics'. Yes, I
> >>>know we get it about 2 months late seeing as
> >>
> >>though
> >>
> >>>we are on the other side
> >>>of the world and it has to come out by Tea Clipper
> >>>etc etc.
> >>>One of the articles concerned a Rolls Royce Merlin
> >>>V12 (from a WWII
> >>>Hurricane fighter) put into RR Phantom based
> >>
> >>chassis
> >>
> >>>and handmade bodywork.
> >>>Very interesting. It made mention that the engine
> >>>was a genuine Rolls Royce
> >>>and not a Rover built version. Can anyone expand
> >>
> >>on
> >>
> >>>this? Did Rover make
> >>>these engines in wartime? And were they only used
> >>
> >>in
> >>
> >>>fighter planes? I've
> >>>not researched this topic extensively but I do
> >>
> >>know
> >>
> >>>of a Rod Hadfield from
> >>>Castlemaine here in Oz who put a supercharged
> >>
> >>Merlin
> >>
> >>>V12 in a custom built
> >>>'55 Chevvy which was supposedly the most powerful
> >>>road registered car in the
> >>>world! The website is
> >>>www.rodshop.com.au/project55.htm.
> >>>It would be interesting to hear of Rover's
> >>>involvement with these engines.
> >>>
> >>>Cheers,
> >>>
> >>>Ray Wilkins
> >>>Melbourne, Australia
> >>>1976 P6B
> >>>
> >>>
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> >>
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> >>
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> >>>
> >>
> >>
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> >
> >
> >
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M. K. Peirce
Rector, Rhode Island Computer Museum