Aircraft Type Index

Aircraft Engine index



The Armstrong Siddeley Cheetah Aircraft Engine

The Armstrong Siddeley Cheetah was an air-cooled seven cylinder radial engine which went in to production during 1935 and remained in production until 1948 at which time 37,200 engines with fifteen versions had been produced, later engines were available with Superchargers and output reduction gear. The Armstrong Siddeley Cheetah proved to be very reliable in service and was the first engine of it's type to be officially certified for 1,200 hours operation between overhauls.

Armstrong Siddeley Cheetah IX Aircraft Engine


Aircraft that were powered by the Armstrong Siddeley Cheetah

Airspeed ConsulAirspeed CourierAirspeed Envoy
Airspeed OxfordAirspeed Queen WaspAirspeed Viceroy
Avro 626Avro 652Avro Anson
Blackburn LincockAvro 626 PrefectCASA C-201
AlcotánVEF JDA-10MMarinens Flyvebaatfabrikk M.F.8
de Havilland Hawk MothEdgar Percival ProspectorHandley Page H.P.R.2
Hispano HS-42IAe.22 DLKingsford Smith PL.7
Koolhoven F.K.51  

Power output:

  • 338 hp (252 kW) at 2,100 rpm for takeoff
  • 345 hp (257 kW) at 2,425 rpm at 7,875 ft (2,400 m)
  • Specific power: 0.41 hp/cu in (18.83 kW/L)

    Cheetah IX Specifications:

    • Type: Seven-cylinder single-row supercharged air-cooled radial engine
    • Bore: 5.25 in (133 mm)
    • Stroke: 5.5 in (140 mm)
    • Displacement: 834 cu in (13.65 L)
    • Length: 52.8 in (1,342 mm)           Diameter: 47.6 in (1,210 mm)
    • Dry weight: 637 lb (289 kg)
    • Valve-train: Two pushrod-actuated valves per cylinder
    • Supercharger: Centrifugal, 5.4:1 reduction
    • Carburettor: Claudel-Hobson carburettor
    • Fuel type: 87 octane petrol
    • Reduction gear: No

    Armstrong Siddeley Cheetah IX

    Armstrong Siddeley Cheetah ix

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