Blackburn Cirrus Bombardier

1950s British piston aircraft engine

Cirrus Bombardier

Blackburn Bombardier 702 on display at the Rolls-Royce Heritage Trust, Derby
Type	Air-cooled 4-cylinder inline piston engine
National origin	United Kingdom
Manufacturer	Blackburn Aircraft
First run	c.1954

The Blackburn Cirrus Bombardier is a British four-cylinder inline aircraft engine, developed and built by the Blackburn Aircraft company in the mid-1950s. The engine featured fuel injection.

Variants

Cirrus Bombardier 203: Military version, 203 hp (151 kW).
Cirrus Bombardier 702: Civil version, 180 hp (134 kW).
Cirrus Bombardier 704: Helicopter engine

Applications

Auster AOP.9
Cierva W.14 Skeeter IIIB
Miles Messenger

Specifications (Cirrus Bombardier 203)

Data from Lumsden.^[1]

General characteristics

Type: Air-cooled, inline inverted four-cylinder
Bore: 4.8 in (122 mm)
Stroke: 5.5 in (140 mm)
Displacement: 398 cu in (6.5 L)
Length: 45.3 in (1,151 mm)
Width: 19 in (483 mm)
Height: 30.95 in (786 mm)
Dry weight: 325 lb (147.4 kg)

Components

Valvetrain: 1 inlet and 1 exhaust valve per cylinder
Fuel system: Fuel injected
Fuel type: 100 octane petrol
Cooling system: Air-cooled

Performance

Power output: 203 hp (151 kW) at 2,100 rpm
Compression ratio: 7:1
Power-to-weight ratio: 0.62 hp/lb (1 kW/kg)

References

Notes

^ Lumsden 2003, p.91.

Bibliography

Oldengine.org Archived 14 March 2007 at the Wayback Machine
Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 40.
Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.