Rolls-royce goshawk

Rolls-royce goshawk
Rolls-royce goshawk
Manufacturer	Rolls royce limited
Years of production	1933
Specifications
Volume	21.25 L
Power	600 h.p. (447 kW) at 2600 rpm
Power density	28.2 hp / l (21 kW / l)
Compression ratio	6: 1
Bore	127 mm
Piston stroke	140 mm
Number of cylinders	12
Valves	overhead valve ( SOHC )
Compressor	single-stage monitoring station
Fuel type	77 octane gasoline
Cooling system	evaporative
Dimensions
Length	1895 mm
Width	620 mm
Height	905 mm
Dry weight	442 kg

Rolls- Royce Goshawk ( English Rolls-Royce Goshawk ) - the British aircraft engine of the interwar period . According to the Rolls-Royce company ’s naming system for birds of prey, the new motor was named after the goshawk . Goshawk was a modification of the Kestrel engine , adapted to use an evaporative cooling system

The engine was first launched in 1933 and developed a capacity of 660 liters. with. Only a few copies were built, since the design of the aircraft on which it was planned to be installed did not meet the requirements of the Royal Air Force . Goshawk was installed on Short Knuckleduster , Supermarine Type 224 (the predecessor of Spitfire ) and other prototypes.

Content

Development History

Goshawk is based on the Kestrel IV prototype, converted to evaporative cooling . Instead of keeping the coolant temperature below the boiling point, it had to evaporate, taking away more heat from the engine during the process of vaporization. Accordingly, it was possible to do with less coolant and reduce the weight of the power plant. However, instead of a conventional radiator, such a system required a much larger capacitor , and its placement on an airplane was a problem.

12 engines were built, which were installed by some manufacturers on prototype aircraft on an initiative basis. The power of the samples ranged from 650 to 700 hp. Problems with leaks and coolant emissions, the placement of bulky condensers in the wing, which made them extremely vulnerable to combat damage, led to the project being closed, but it gave developers valuable experience that was fully taken into account when creating the Merlin engine ^{[ 1]} .

Options

Goshawk i: (1932) Created on the basis of the prototype Kestrel IV .
Goshawk ii: (1935) 600 h.p. Reduced gear ratio.
Goshawk iii: (1935) 600 h.p. Further reduction in gear ratio.
Goshawk vi: 660 h.p. High ratio gearbox.
Goshawk vii: 660 h.p. Increased gear ratio.
Goshawk viii: 660 h.p. Special experimental engine with a maximum power of 837 hp.

Application

Goshawk is approved as the power plant for the Short Knuckleduster twin-engine flying boat (Specification R24 / 31) and is presented as “Preferred” for fighter aircraft ( Department of Aviation Specification F7 / 30). It was used on three officially sponsored fighter prototypes: Supermarine Type 224 (number K2890 ), Westland F.7 / 30 ( K2891 ) and Blackburn F3 ( K2892 ), which carried out taxiing on the ground, but did not fly into the air, as well as those developed in initiative Bristol Type 123 and the Hawker PV3

Goshawk was also installed on privately-owned Hawker aircraft, the High Speed Fury Mk 2 ( K3586 ) and Intermediate Fury 2 ^[2] , Westland Pterodactyl V ; Gloster TSR.38 ( S1705 ) and the first prototype Gloster Gnatsnapper ( N227 ) were tested with it

Aircraft List

Blackburn f3
Bristol Type 123
Gloster gnatsnapper
Hawker fury
Hawker PV3
Supermarine Type 224
Westland pterodactyl v
Westland F.7 / 30 (sometimes referred to as Westland PV4)

Specification

Main characteristics

Type: four-stroke 12-cylinder V-shaped with the collapse of 60 ° liquid cooling units
Cylinder diameter: 127 mm
Piston stroke: 140 mm
Engine displacement: 21,25 l
Length: 1895 mm
Width: 620 mm
Height: 905 mm
Dry weight: 442 kg

Features of functioning

Valves: Overhead ( SOHC )
Compressor : single-stage monitoring station
Fuel Type: 77 Octane
Cooling System: Evaporative

Performance

Output power: 600 hp (447 kW) at 2600 rpm
Power density : 28.2 hp / l (21 kW / l)
Compression ratio : 6: 1
Specific power by weight: 1.36 hp / kg (1.01 kW / kg)

Notes

↑ Gunston 1989, p. 141.
↑ "Fighting Breed" Flight 1951 p692

Literature

Gunston, Bill. World Encyclopedia of Aero Engines . Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
Lumsden, Alec. British Piston Engines and their Aircraft . Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6 .
"The Two Rs" Flight 1954 from archive at Flightglobal.com

[1] Gunston 1989, p. 141.

[2] "Fighting Breed" Flight 1951 p692