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 Model 275 F1
Formula 1 racing car.
Years of activity 1950
First race Belgian Grand prix of 18.6.1950.
Engine Type 275. 12 cylinders in 60° V. Front-mounted. Light alloy cylinder head and block, head in block with upper part of cylinders, screw-fitted cylinder liners, water cooled.
Bore and stroke 72 x 68 mm.
Unitary and total capacity 276.86 / 3,322.3 cc.
Compression ratio 10:1.
Max. power output 300 bhp at 7,300 rpm.
Timing gear 2 valves per cylinder, 1 overhead camshaft per bank of cylinders, chain drive.
Fuel feed 3 Weber 42 DCF twin-choke carburettors.
Ignition Single, 2 Marelli magnetos.
Lubrication Forced. Dry sump.
Transmission Rear. Multi-plate clutch. Gearbox with 4 speeds + reverse in block with self-locking differential.
Gear ratios Variable depending on racing circuit.
Frame Tubular with elliptic section longitudinals.
Front suspension Double wishbones, double triangles, transverse lower leaf springs, Houdaille lever dampers.
Rear suspension De Dion axle, transverse lower leaf spring, 2 longitudinal struts, Houdaille lever dampers.
Steering Worm and sector.
Brakes Bimetallic drums on all four wheels, hydraulic control.
Tyres Front 5.50x16î, rear 7.00x16î. Pirelli.
Rims Spoked.
Wheelbase 2,420 mm.
Front/rear track 1,278 / 1,250 mm.
Length 3,937 mm.
Width 1,428 mm.
Height 960 mm.
Weight with water and oil 850 kg.
Fuel tank 195 litres of mixture. Rear-mounted.
Bodywork Aluminium single-seater body.
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