Archive 37
Marwyn 500cc
racing car
Introduced
in 1947, the contours of the Marwyn racing car were reminiscent
of the legendary pre-war Auto-Unions.
Powered by a half-litre engine, the sleek racer could be bought
fully assembled or as a 'kit of parts'.
When British motor sport awoke from
its long enforced slumber during World War 2, most parts of
the UK were involved and the Wessex region was no exception,
the Marwyn being one of the designs of the new 500 single-seater
category. It was one of many attempts to bring professional-level
single-seater car racing to impecunious young (and frequently
not so young) drivers.
'500' refers not to the
purchase price (although the Marwyn was well within that bracket)
but to the engine size - cars powered by unsupercharged engines
up to 500cc.
The Marwyn followed the
pattern set by the Cooper, which remained the most successful
marque throughout the life of the class: motor cycle engine
behind the driver, powering the rear wheels via a motor cycle
gearbox and with chain transmission to gearbox and back wheels.
Very few 500s had any other layout.

Marwyn
500cc racer (courtesy of Irene Pulliblank).
The Marwyn was different
from most (which used tubular chassis frames) in having a
chassis of steel channelling. Lord Strathcarron, who became
the best-known Marwyn driver, says this material was re-cycled
from wartime Morrison shelters. For those too young to know,
these were steel tables designed to replace the conventional
dining room table within a house. The 'table top' was a massive
steel plate about half-an-inch thick and it was almost certainly
the table 'legs', of much thinner steel channelling, from
which the Marwyn chassis was constructed.
When the sirens sounded
their warning of an impending air raid, people in houses with
Morrison shelters could sleep at home beneath their 'table',
rather than evacuating to a public air raid shelter (typically,
the platforms of London Underground stations) or the other
'home' alternative - a corrugated steel Anderson shelter in
the garden, which sat in a hole dug in the ground, using the
excavated earth to cover the steel structure, giving extra
protection. That the Morrison shelter was strong can be gauged
from the fact that the author's aunt emerged relatively unscathed
when, in 1944, a German bomb exploded nearby, causing her
East London house to collapse over the 'dining room table',
below which she had been trying to sleep.
The Marwyn first saw action
in 1947, too late for most of the small number of events for
the class that year, when the British motor racing scene was
still re-emerging shakily from six long years of war.
It made its debut in September
'47 at Brighton Speed Trials, which was destined to become
one of Britain's most popular sprint events, held on a virtually
straight kilometre-long course on the Madeira Drive seafront
road. A single brake drum combined with a differential was
used at the rear, so it seems to have had no way of equalising
the braking effort to the rear wheels.

Despite such a layout
(in any case, braking performance was of little consequence
at this Brighton event), Samuelson took the Triumph twin-cylinder
'Tiger 100' engined Marwyn to third place in its class. Soon
after, a Marwyn in chassis form (the same car as at Brighton
Speed Trials?) took part in the Shelsley Walsh hillclimb.
It was powered by a Speedway-type JAP engine and was driven
by B E Martin. He was the company's proprietor (the 'Mar'
of 'Marwyn'? But who was the 'wyn'? - Gear Wheels has
been unable to find out).
By December '47, the Marwyn
company, then based at 55, Old Christchurch Road, Bournemouth
(now a Clinton Cards shop in a pedestrian precinct which is
one of the town's main shopping areas) was offering cars at
£445, including JAP engine and Burman motorcycle gearbox.
By then, the front suspension was independent, with the upper
mountings being a pair of transverse quarter-elliptic springs,
while the lower mountings were tubular steel wishbones. Rear
braking had been changed to separate drums at each wheel and
the rear axle was 'solid' (i.e., no differential). Rear suspension
retained the original longitudinal quarter-elliptic layout.
However, the brakes were cable operated and shock absorbers
were of the Hartford friction type whereas, by then, many
other 500s had hydraulic brakes and telescopic hydraulic dampers.
Customers didn't have
to buy a complete car. Assembled (but without engine or gearbox),
it was available for £245 or, in kit form, £200. Several owners
took advantage of the 'kit' alternatives. Denis Flather fitted
a Scott twin-cylinder water-cooled two-stroke engine in a
car he called the Marott (it is still being used in competition,
now called 'Blue Flash' and with a Vincent engine), another
was raced in Scotland, powered by a Triumph twin engine and
called an 'MHW', while J M Sparrowe's 'SMS' was a Marwyn with
a Rudge engine, but more about that
in the next edition. To be concluded.
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