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ADC Airdisco

ADC Airdisco installed in a DH.51

An air-cooled V-8 piston engine, the 'Airdisco' was developed from the French Renault 70 hp aero engine by Frank Halford of the Aircraft Disposal Company. First running in 1925, the main difference being the use of aluminium cylinder heads. Halford later used one bank of cylinders to create the Cirrus engine.

Valvetrain: 1 inlet and 1 exhaust valve per cylinder
Fuel system: Carburettor
Fuel type: 74 octane
Cooling system: Air-cooled
Reduction gear: 0.5:1, right hand tractor
Power output: 120 hp ( kW) at 1,800 rpm (takeoff power)
Compression ratio: 4.6:1

Avro 548A
Cierva Parnall Gyroplane
de Havilland DH.51
Royal Aircraft Factory S.E.5A

Type: Inline air-cooled, upright, V-8 piston engine
Bore: 4.13 in (105 mm)
Stroke: 5.12 in (130 mm)
Displacement: 548.94 cu in (9 L)
Length: 46 in (1,168 mm)
Width: 21.3 in (541 mm)
Height: 31.1 in (790 mm)


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