Bristol Lucifer
# Bristol Lucifer

The Bristol Lucifer was a British three-cylinder, air-cooled, radial engine for aircraft. 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.1D
* Bristol Primary Trainer
* Bryant 1927 monoplane (Dole Race entrant, christened Angel of Los Angeles)
* Handley Page Hamlet
* LFG V 44
* NVI F.K.29
* Parnall Peto
* Tupolev ANT-2
* Udet U 8

## Specifications (Lucifer 1)

Data from Lumsden

### General characteristics

* 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 (1,219 mm)
* Dry weight: 324 lb (147 kg)

### Components

* Valvetrain: Four valves per cylinder, poppet valve
* Fuel type: Petrol
* Cooling system: Air-cooled

### Performance

* Power output: 100 hp (75 kW)
* Compression ratio: 4.8:1
* Power-to-weight ratio: 0.3 hp/lb (0.5 kW/kg)
