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McLaren Formula 5000

We would be very keen to hear from anyone who has information or photographs that we may publish.

M3 - 1965-66

Picture yet to be retieved from archive

The 1965 sports car experiences with the big V8s, with lightweight chassis led to the design and production of the low cost and reliable space frame single-seater for the 1966 Formula Libre, hillclimb/sprint car. It was competitive and only a handful were built.

The M3 was also known as the "whoosh bonk" car and was the MGM camera car for the film Grand Prix.

Chassis: Large diameter tubular spaceframe with steel bulkheads and an aluminium dash panel doubling as a bulkhead in the cockpit area. Chassis tubes carried coolant and an aluminium undertray was bonded and riveted in place to add strength.

Suspension: Independent by unequal length wide based wishbones, anti-roll bar and adjustable coil spring/shock units in the front. Trailing radius arms with single top links, reversed lower wishbones, anti roll bar and adjustable coil spring/shock units at the rear. Supplied with optional 15 inch diameter rear wheels.

Brakes: Girling 107/16th inch disc all round with AR calipers. Special inch thick discs for GP versions.

Body: Polyester resin panelling to customers preference.

Engine: To customer preference although engine bay was capable of accepting Oldsmobile, Ford-Cobra, Ford-Indianapolis V-8s or 3 Litres Repco V-8, Maserati V-12 and 2.5 or 2.7 litre Coventry Climax 4 cylinder F1 units. Rear bulkhead designed to accept Hewland LG or ZF DS25 transaxles.

Dimensions: Wheelbase 96 inches (required for possible Indy use), front track 51 inches, rear track 52 inches, overall length 142 inches, height to top of windscreen 29 inches, weight (with 5 litre Oldsmobile) 1100 lbs.

M10A 1969

McLaren were one of the few successful manufacturers to produce Formula A/5000 cars. This Formula was introduced in 1969. The M10A designed by Gordon Coppuck was extremely successful and dominated the first season of the European Formula 5000. Trojan built 17 cars that season.

Chassis: Full up and over monocoque with aluminium.

Photos from the Hunter family collection

M10B  1970/71

The 1970 development of the M10A differed in several aspects derived around weight saving initiatives. Peter Gethin won his second consecutive Guards F5000 championship with one of the twenty-one cars built.

M18 1971

Photo from Hunter family collection

Trojan built this Formula A/5000 and this production model for 1971 used a 5-litre Chevrolet V8 with a Hewland DG transaxle. The M18 is a much revised Formula A/5000 car with a much lower, flatter nose.

Chassis: It has a full aluminium monocoque chassis.

Suspension: Front suspension is by a lower wishbone with a top link and radius arm, while the rear suspension is by a reversed lower wishbone with a top link and radius rods.

Brakes:

Body:

Engine: 5-litre Chevrolet V8 engine with a Hewland DG transaxle.

Dimensions: Wheelbase of 100 inches, a front track of 59.5 inches and a rear track of 60 inches. It has 13-inch front wheels with 11-inch rims, and 15-inch rear wheels with 16-inch rims.

M22  1972

Picture yet to be retrieved from archive

Trojan production Formula 5000 car for customer sale.

M25  1975

Picture yet to be retrieved from archive

This was John Barnard's still-born 1975 Formula 5000 car based on the successful M23 experience.

 

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