Cosmos Lucifer

The Bristol Lucifer was a British three-cylinder, air-cooled, radial engine for aircraft, first run in 1919. Built in the UK in the 1920s by the Bristol Aeroplane Company, it produced 100 horsepower (75 kW).

The Lucifer was originally a Cosmos Engineering engine, Cosmos being taken over by Bristol in 1920.

Applications:
Albatros L 69
Avro 504
Boulton Paul P.10
Bristol M.1
Bristol Primary Trainer
Handley Page Hamlet
NVI F.K.29
Parnall Peto

Lucifer 1
Type: 3-cylinder air-cooled single-row radial engine
Bore: 5.75 in (146 mm)
Stroke: 6.25 in (159 mm)
Displacement: 487 in³ (8.0 L)
Diameter: 48 in (1219 mm)
Dry weight: 324 lb (147 kg)
Valvetrain: Four valves per cylinder, poppet valve
Fuel type: Petrol
Cooling system: Air-cooled
Power output: 100 hp (75 kW)
Compression ratio: 4.8:1
Power-to-weight ratio: 0.3 hp/lb