Mercedes-Benz 300SLR '1955
The Mercedes-Benz 300SLR is a legendary car that put an end to the racing history of Mercedes-Benz. Despite the general 300SL index and external resemblance to the Mercedes-Benz 300SL Gullwing (W198), it had nothing to do with the production model: the 300SLR (Sport Leicht Rennen) roadster was developed on the basis of the Mercedes-Benz W196 Formula 1 car equipped with an in-line injection 8-cylinder 250 hp engine.
Design Mercedes-Benz 300SLR
The heir to the Silver Arrows of the 1930s, this single-seater became the undisputed Grand Prix champion in 1954 and 1955, winning a total of 12 races. In 1955, under the leadership of Rudolf Uhlenhout, a completely different machine was created for the Sports Car Championship - the Mercedes-Benz 300SLR (W196S) on the light and durable W196 chassis with a space frame made of steel tubes.
Design Mercedes-Benz 300SLR
Upgraded to 2982cc, the Mercedes-Benz 300SLR inline 8-cylinder engine had a unique DOHC design: two spark plugs per cylinder, proven on the production 300SL Bosch direct mechanical fuel injection, and a desmodromic valve system that used levers to control valves instead of springs. On a special high-octane mixture of gasoline, benzene and ethyl alcohol, the engine produced 310 hp.
Design Mercedes-Benz 300SLR
It was installed longitudinally behind the front axle at a 33 ° angle, creating an asymmetrical bulge on the right side of the bonnet. The car was equipped with a 5-speed manual transmission in a block with a rear axle, side-mounted hydraulic drum brakes, an independent torsion bar suspension (at the rear on swinging axle shafts), 16-inch wheels, a 167-liter gas tank. and an oil tank of 35 liters.
Design Mercedes-Benz 300SLR
The Mercedes-Benz 300SLR weighed 900 kg, of which only 50 kg were for the space frame and 234 kg for the engine. The body of the car was made of an Elektron magnesium alloy and had a very low drag coefficient. Aerodynamics were improved by plastic caps on the headlights, a long fairing behind the driver's seat and a metal panel that covered the passenger seat. The hydraulically operated boot lid opened back to act as an air brake (developed by Alfred Neubauer) and also create downforce when cornering. The maximum speed of the 300SLR was 300 km / h.
Design Mercedes-Benz 300SLR
After extensive endurance testing, the Mercedes-Benz 300SLR was ready for the 1955 racing season. Four 300SLR crews, driven by Juan Manuel Fangio, Stirling Moss, Karl Kling and Hans Hermann, debuted at the Mille Miglia.
Design Mercedes-Benz 300SLR
The 1,000-mile ride from Brescia to Rome and back was won by Stirling Moss and Denis Jenkinson in car number 722 in a record time of 10 hours 7 minutes 48 seconds at an average speed of 157.65 km / h. Fangio finished second, the rest of the crews dropped out of the race. This was only the beginning of success: further victories at Targa Florio in Sicily, British Tourist Trophy, Eifelrennen at Nurburgring and Swedish Kristianstad followed.
Interior Mercedes-Benz 300SLR
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Mercedes-Benz 300SLR '1955
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