The Rolls Royce Kestrel Aircraft Engine
The Rolls Royce Kestrel was a successful V12 aero engine which first ran in 1926, the British Air Ministry had wanted more powerful and lighter engines utilising cast aluminium blocks, as no British company was developing such an engine they ordered both Rolls-Royce and Napier & Son to design one, the Rolls Royce Kestrel was designed to meet the Ministry's requirements.
The Rolls Royce Kestrel proved to be a state of the art engine, it not only had a cast aluminium block but also featured a pressurised cooling system, existing water cooled engines were limited in they altitude they could run at as as the air pressure decreased with altitude the water boiled in to steam at lower temperatures, the pressurised system allowed the engine to run up to 150 °C at any altitude before the coolant boiled.
The prototype Rolls Royce Kestrel first ran in 1926 and powered an aircraft the following year. The engines power output was initially 450 hp (340 kW) and eventually reached 720 hp (537 kW) by 1940. The high power output, weight and reliability lead to the Rolls Royce Kestrel being the first choice for many military aircraft, it was even chosen to power the infamous German WW2 prototypes of the Messerschmitt Bf 109 fighter and the Junkers Ju 87 "Stuka" dive bomber.
Aircraft that were powered by the Rolls Royce Kestrel
|Airco DH.9||Avro Antelope||Blackburn Nautilus|
|Blackburn Sydney||Fairey Fleetwing||Fairey Hendon|
|Fairey S.9/30||Fokker C.V||Fokker C.X|
|Fokker D.XVII||Gloster Gnatsnapper||Gloster TC.33|
|Gloster TSR.38||Handley Page Hamilton||Handley Page Heyford|
|Handley Page H.P.30||Hawker Audax||Hawker Demon|
|Hawker Fury||Hawker Hardy||Hawker Hart|
|Hawker Hind||Hawker Hornet||Hawker Nimrod|
|Miles MasterHawker Osprey||Heinkel He 70 G-1||Heinkel He 112|
|Henschel Hs 122||Junkers Ju 86 prototype||Junkers Ju 87 prototype|
|Messerschmitt Bf 109 prototype||Miles Master||Miles Kestrel|
|Parnall Pipit||Praga E-45||Renard R.31|
|Saro A.10||Short Gurnard||Short Singapore|
|Supermarine Scapa||Supermarine Southampton||Vickers F.21/26|
|Vickers Type 150||Vickers Type 163||Westland Wizard|
Rolls Royce Kestrel V Specifications:
|Type: Supercharged liquid-cooled 60-degree V12 engine with 2 valves per cylinderBore: 5 in (127 mm) Stroke: 5.5 in (140 mm)Displacement: 1,295.88 in³ (21.25 L)Length: 74.61 in (1,895 mm) Width: 24.41 in (620 mm) Height: 35.63 in (905 mm)Dry weight: 957 lb (434 kg)Supercharger: Gear-driven centrifugal superchargerFuel system: Rolls-Royce carburettorFuel type: 87 octane petrolCooling system: Liquid-cooled, pressurised to 300°F (150°C)Reduction gear: Spur, 0.553:1Specific power: 0.53 hp/in³ (24.05 kW/L)Compression ratio: 6.0:1Oil consumption: 0.18-0.35 oz/(hp/hr) (7-13 g/(kW/hr)) || |
Rolls Royce Kestrel VI
|Rolls Royce Kestrel V Power output: |
- 685 hp (511 kW) at 2,240 rpm for takeoff
- 631 hp (471 kW) at 2,900 rpm at 14,400 ft (4,400 m)
- Power-to-weight ratio: 0.72 hp/lb (1.18 kW/kg)
Rolls Royce Kestrel Ib
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Rolls Royce Kestrel Aircraft Engine picture and Specifications