Posts Tagged ‘Cooper Mk5 Jap’

(Davey-Milne)

Albert Park, March 1955- ‘Albert Park Trophy’ with #10 Patterson, #9 Davison and #81 Jones on pole…

Rather a sign of the times, Cooper were on the march to world domination, their mid-engine, air-cooled  designs perfected over the early forties into the fifties.

Between these three fellows were six AGP victories, or perhaps five given Davo and Patto shared one of them- and three Gold Stars, one apiece. They were front-running Victorians for well over a decade and shared a passion for cars and business- all three Holden dealers at one point in time.

Bill Patterson’s green machine is a Mk5 JAP, Lex Davison’s a Mk4 Vincent and Stan Jones a Mk4 JAP. Patto took the Albert Park win in a race of attrition from Gib Barrett’s BWA and Otto Stone’s MG K3- Jones pitted with a misfire and Lex also retired.

Stan behind, and Reg Robbins leaning on the Cooper Mk4 at Rob Roy (L Sims)

Jones aboard the Cooper Mk4 at Rob Roy, date folks? (L Sims)

Jones chassis ’10/53/50′ was imported by Melbourne Cooper distributor Keith Martin in early 1951 and was claimed to be an intermediate version having a Mk5 chassis and Mk4 bodywork. Fitted with a 1098cc JAP race motor, the 95bhp machine sat in Martin’s showroom for a year before acquisition by Stanley who first raced it at Rob Roy in March 1952.

‘The car became one of the top under 1500cc cars for both circuits and hillclimbs- the battle for hillclimb records between Jones, Davison and Patterson was a highlight of motorsport in the early fifties’ John Blanden wrote.

Holder of many outright records the car was offered for sale in AMS in December 1953 and finally acquired by Earl Davey-Milne in December 1955, he raced it first at Albert Park in 1956 and still retains the car which is said to be the lowest mileage air-cooled Cooper of them all.

Davey-Milne resplendent in collar and tie racing the Cooper at Albert Park during the Australian Tourist Trophy meeting in November 1956- DNF in his ‘rapid little Cooper-JAP’ in the Argus Cup (Davey-Milne)

Credits…

‘Historic Racing Cars in Australia’ John Blanden, Davey-Milne Family Collection, Leon Sims, Graham Noonan, ‘Glory Days’ Barry Green

Tailpiece: Jones aboard the Cooper Mk4, circa 1954…

(L Sims)

Finito…

 

 

 

 

image

Jock Walkem and his mate ponder changes to their Cooper and it’s moody Jap ‘V-twin’ engine before the next run…another of those ‘just so period’ shots…

Lots of interesting details to grab the eye…the gear lever for the ‘positive stop’ motor cyle ‘box, mirror mounted on the transverse leaf, equipe logo on the cars side, i wonder whose it is? Relaxed look and feel of the event and the formal clothing of the kids on a Tasmanian Sunday compared with today…

Penguin is a tiny village on the North-West Coast of Tasmania, the Hillclimb still holds race meetings.

Cooper MkV/41/51 is significant in the pantheon of the many air-cooled Coopers which came to Australia in the 1950’s. Perhaps the most successful, it was owned and raced by Tom Hawkes and ‘Gold Star’ (Australias’ national drivers championship) winners Stan Jones and Bill Patterson earlier in their careers.

An interesting article about this particular car is in the magazine ‘Loose Fillings’, which specialises in these air-cooled racers.

http://www.hsrca.com/wp-content/uploads/2013/06/LooseFillings-44Print.pdf

F3 racing in the UK provided both the training ground for some of Britains Champions of the 1950’s…Stirling Moss, Peter Collins, Stuart Lewis-Evans being good examples, and also for engineers. The class also accelerated the growth of the infrastructure of subcontractors which formed one of the bases of Britains global dominance as a manufacturer of racing cars which continues today.

500cc Clubs

Those with an interest in these cars should check out the ‘500 Owners Association’

http://www.500race.org/index.htm

Technical details…

Cooper Mk5 cutaway

Chassis is box-sections, with transverse leaf springs and wishbones front and rear. Burman steering, Lockheed hydraulic drums front and rear provide the stopping power. Chain drive. Circa 520Lb in weight. Cast alloy wheels 4 or 5 X 15 inch diameter wheels. (Vic Berris)

Cooper Mk5 sales ad

JAP 8 80 drawing

The Walkem MkV was fitted with a ‘JAP’ 8/80 V Twin, 996cc, pushrod OHV, engine. Circa 76.5 bhp@6300rpm. The 500cc ‘ JAP’ single produced around 40bhp, both engines used compression ratios of 14:1 and used alcohol fuel provided by Amal carb(s)

Etcetera…

Cooper Mk5 Motorsport article

Photo Credits…

Check out the archive of oldracephotos

http://www.oldracephotos.com/content/home/

Vic Berris cutaway drawing, MotorSport Magazine

Finito…