JBS MKI, 1951 MKI | Conceptcarz.com - Pictures, Pricing, Information, Wallpaper, History

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F3
Chassis Num: RAC/002/51/AC
Engine Num: CNR-MKI

Richard Utley acquired the car in 1987 and restored it first using a Triumph Twin engine. In 1991 a C&R Reproduction Long Stroke Manx (FISA Approved) was fitted. Since 1988 the car has been raced successfully both in the UK and on the US Continent.

In 1951 Alf Bottoms built a batch of 13 cars which were extremely successful. Unfortunately, Alf was killed in practice for the Luxemburg Grand Prix in early 1951 and the car's development was curtailed. They were extremely well built, and of an advanced design. They were powered by Manx Norton, JAP and Triumph engines. The original Works Cars had anodized aluminum bodies and wire wheels; later Dunlop cast magnesium wheels were fitted which were more reliable. Drivers included, Peter Collins, Curly Dryden, Wing Commander Aitkin's, Don Parker, John Coombs, and Les Leston.

The vehicle is constructed from tubular steel twin tube chassis. It has double wishbones in the front and rear, using coils and springs, and Alf Bottoms designed telescopic dampers. The car has a light-alloy rack-and-pinion steering. There are twin leading shoe brakes, Alfin drum brakes, and a rear mounted engine. The Norton gearbox is chain driven to the rear axle (no differential). There is a mechanical fuel pump, light alloy 15-inch wheels, and a light alloy fuel tank and body.

Richard Utley was a regular competitor at Goodwood from 1955 to 1960 first in a LeMans Replica Frazer-Nash, followed by a Tajeiro 1100 and Lotus XI. In 1958 he worked with John Tojeiro building the 1100 sports car. He was also the designer of Caravelle Formula Junior, which he built with Bob Hicks in 1960/61. He gave up racing in 1962, only returning to Historic Racing in 1987, first with a Marlyn F3-500 and then with his JBS F-3 500. In the early nineties as well as the JBS he campaigned a Lotus Eleven, and more recently the MK1 Caravelle FJ. In 1990 he founded C&R Engines with Charlie Banyard Smith re-manufacture the long stroke Manx engine.

Formula 3

Formula 3 was created in post-war Britain as a venue for inexpensive racing. The 500-pound, 500cc F3 cars were noisy, tiny, and sometimes home built. They were often ridiculed but very fast. With an all-independent suspension, tubular chassis and motorcycle engine placed directly behind the driver, the Formula 3 cars are said to have led directly to the Formula 1 'rear engine revolution' of the early 1960s. Although Formula 3 was not created as a training class, Stirling Moss, Peter Collins, Eric Brandon, Don Parker, Jim Russell, and Ivor Bueb were just a few of the many top ranked British drivers of the 1950's who began their careers in the seat of one of these motorcycle engine powered 500cc cars. In 1959, the 500cc formula was discontinued in favor of the Formula Junior specification.

1951 JBS MKI
Year	1951
Make	JBS
Model	MKI
Body Style	F3
Engine Location	Mid
Drive Type	Rear Wheel
Body / Chassis	Tubular
Combined MPG	0.00

Chassis / Engine Numbers Shown
Chassis Number	RAC/002/51/AC
Engine Number	CNR-MKI

Engine
Engine Configuration	I
Cylinders	1
Aspiration/Induction	Normal
Displacement	498.00 cc \| 30.4 cu in. \| 0.5 L.
Horsepower	50.00 HP (36.8 KW) @ 6500.00 RPM
HP / Liter	100.0 BHP / Liter
Fuel Type	Gasoline - Petrol

Standard Transmission
Gears	4
Transmission	Manual
	Norton

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1951 JBS MKI