Competition and Race Shop  

AJS 7R racer pic
AJS 7R Boy Racer

 

The AMC Race Shop was a single-storey building located separately from the main factory, on the opposite side of Burrage Grove.


The road-end of the building was allocated to the Competition Department, comprising two fixed-height bike preparation benches where scrambles machines were built to the specific requirements of works riders such as Vic Eastwood, and separately managed by Wally Wyatt.


Jack Williams pic
Jack Williams

The remainder of the building was under the control of development engineer Jack Williams who had his office at the rear (under a mezzanine floor where the race shop spares were stored), and looked out onto an engine assembly area, comprising assembly benches on one side with a lathe, cam profiling machine and various small machine tools along the other wall.

In the centre of the building, arranged at an angle, were several fixed-height bike building benches where the highly-skilled, specialist personnel took meticulous care in their preparation of 7R and G50 racing machines, often under pressure before major events, such as the Isle of Man TT races.


Batch of 7Rs in race shop pic
Jack Williams with batch of racing bikes in preparation (from poster on the wall at the National Motorcycle Museum)

7R on test bench pic
Phil Irving and Jack Williams
with 7R engine on test bench (1961)

Outside, beyond the rear wall of the race shop, two water dynamometers were housed in separate underground caverns, accessed by steep steel ladders, where engines were tested for power output behind steel mesh guards.


Large diameter 2-speed fans, drawing in air from the roof, were positioned in front and behind the open-exhaust engine to provide air cooling at speeds up to 95 mph.

Readings were taken by the (well-earmuffed) testers of the brake output, speed, fuel consumption, barometric pressure, etc.

(Winter was not always the best time for testing as, if it was snowing outside, the fans would blow snow onto the test bed).


Fortunately, the exhaust noise from the test pits exited onto a railway line and not near to any housing, or the race shop would have received quite a few complaints from otherwise fairly tolerant neighbours.

7R engine on test bed sketch
7R engine on test bed
G50 preparation pic
Putting finishing touches to three Matchless
G50s machines outside Race Shop (c.1960)
(Hover cursor over faces to identify)
Jack Emmott Derek Dixon Tommy Mortimer
TT group pic
Jack Williams, Eric Goodfellow and Rod Coleman
at the Isle of Man races. Rod came 3rd in the
1952 TT and won in 1954, on an AJS 7R3
Heenan & Foude dynamometer sketch
Heenan & Froude water dynamometer

The water dynamometer works by forcing water, under pressure, through
the central vane (detail 1). By closing the brass cups over the central
vane, the complete outer casing is caused to tip.
To counteract this, balance weights are hung on the rear and the inch
scale adjusted to align the pointers (details 2 & 3)
Readings of weight, distance and RPM allow calculation of the output of
the engine on test.

Click for more information

Keith Jackson recalls that, during his apprenticeship placement in the race shop, in mid-1963, he was chosen to help out with a special engine test on the dynamometer.

It appears that the company had allowed Paul Dunstall (who had close contacts with AMC) a day's grace on the main test bed to try to improve the power output of one of his Domiracer engines.


Keith says that 'I had to install his engine onto the test bed, couple it up and then work with Jack Williams and Paul Dunstall to run the power curves on the dyno.

The work that day was mostly assisting when running the dyno, then having to extend the engine inlet tract with spacers, shorten the exhaust pipes and then run another power curve.

This was done many times over that day and the engine power output was improved'.


Sadly, Keith can't remember just what the power output was after all the changes, but refers to his contribution in obtaining it as 'such a privilege to have been involved in that day'.





(see also names highlighted in the personnel list for their Cover Page stories)

 

 


Race Shop Personnel
Jim Barratt
Stan Bassettlater tool room extension
Jim Boughen1932 - 1969
Jack Brett
Arthur Childsengine builder
Freddie Clarke1946 - 48Manager ex Triumph/Ariel
Joe Craig1941 - 46Manager ex Norton
Jack (JH) Colverexperimental/engine repair
Jack Emmott
Eric Goodfellowformerly tool room
Wilf Grahamlater tool room extension
Ike Hatchc. 19517R3 develoment engineer (d. 1954)
Des Henry1953 - ?ex. HWM
Ted Iffland7R3
Phil IrvingDevelopment engineer
Arthur Keelerengine builder
Bill Lovett1919 - 48Porcupine engines
Reg Masonengine builder
Charlie (Ginger) Matthews1928 - ?later drawing office clerk
Norman Maurice
John McClaren1950-69competition shop
Tommy Mortimermachinist/engine builder (formerly tool room)
Peter Murphy
George Rowleyex-AJS
Monty Sayerc.1953?Manager
Bert Shade
Brian Spalding
Jack (C J) Williams1954 - ?Manager/Dev. Eng. ex. Vincent
Matt WrightManager/Development Engineer