Armstrong Siddeley Jaguar

Armstrong Siddeley Jaguar IV

The Armstrong Siddeley Jaguar is an aircraft engine that the British manufacturer Armstrong Siddeley built from 1922. The air-cooled two-row 14-cylinder radial engine has displacements from 22,532 to 24,785 cm³. The Jaguar III came in 1923, the Jaguar IV in 1925 and the Jaguar VI in 1927.

construction and development

The Jaguar was developed from a design proposal from the Royal Aircraft Factory (RAF.8) and was designed for the use of a compressor with a reduction gear. In the test run on June 21, 1922, the power output was worse than expected, so the cylinder bore was enlarged to 139.7 mm. All variants made after the Jaguar I have this enlarged cylinder bore. Due to the lack of a central crankshaft bearing, the Jaguar suffered from vibrations throughout its construction period.

The most powerful variant Jaguar VIC developed a take-off power of 490 bhp (365 kW) at 1950 rpm and weighed 413 kg. The later built Lynx had only one star with Jaguar cylinders.

variants

Jaguar I: 1922, 300 bhp (223 kW)
Jaguar II: 1923, 385 bhp (287 kW), larger cylinder bore, displacement 24,785 cm³.
Jaguar III: 1923, 385 bhp (287 kW).
Jaguar IIIA: 1923, 380 bhp (283 kW).
Jaguar IV: 1925, 385 bhp (287 kW), double carburetor.
Jaguar IVA: 420 bhp (313 kW), reduction gear for the propeller.
Jaguar IVC: 1928, 400 bhp (298 kW), redesigned connecting rods , encapsulated valve train.
Jaguar IV (S): 1925, 365 bhp (272 kW), with compressor.
Jaguar V: 1928.
Jaguar VI: 1927.
Jaguar VI (S): 1928, supercharged version of the Jaguar VI.
Jaguar VIC: 1927, 470 bhp (350 kW), Jaguar VI with reduction gear for the propeller.
Jaguar VID: 1928.
Jaguar VIIA: 1929, 400 bhp (298 kW), with compressor.
Jaguar VIII: 1928, 405 bhp (302 kW), with compressor and reduction gear for the propeller.

Aircraft with Armstrong Siddeley Jaguar

Airco DH4 Airco DH9 Armstrong Whitworth Ajax Armstrong Whitworth Aries Armstrong Whitworth Argosy Armstrong Whitworth Atlas Armstrong Whitworth Siskin Armstrong Whitworth Starling Armstrong Whitworth Wolf Avro 642 Blackburn Airedale Blackburn CA15C Blackburn Turcock Boulton Paul P. 71 De Havilland DH.42 Dormouse	De Havilland DH.50 De Havilland DH.61 Giant Moth De Havilland D.56 Hyena Fairey Ferret Fairey Flycatcher Fokker CV Fokker D.XVI Gloster Gnatsnapper Gloster Grebe Handley Page Hampstead Hawker Danecock Hawker Hawfinch Hawker hoopoe Hawker Woodcock	Larkin Lascowl Martinsyde ADC 1 Nieuport Nighthawk Parnall Plover RAAF Experimental Section Warrigal II Supermarine Air Yacht Supermarine Nanok Supermarine Southampton Vickers Vellore Vickers Vespa Vickers Viastra Vickers Vimy trainer Westland Wapiti Westland Weasel

Motors on display

A surviving Armstrong Siddeley Jaguar can be seen in the Science Museum in London .

Data (Jaguar I)

Sectioned Jaguar engine in the Science Museum

General

Two-row 14-cylinder radial engine, air-cooled, with compressor
Bore: 127 mm
Stroke: 127 mm
Displacement: 22,532 cm³
Length: 1041 mm
Diameter: 1092 mm
Weight: 322 kg

Components

Compressor: with reduction gear
Mixture preparation: carburettor
Cooling: air
Reduction gear: no

power

Power: 680 bhp (507 kW)
Output per liter: 22.50 kW / l
Compression: 5: 1
Petrol consumption: 71 l / h
Power-to-weight ratio : 0.635 kg / kW

Individual evidence

^ ^A ^b Alec Lumsden: British Piston Engines and their Aircraft. Airlife Publishing, Marlborough, Wiltshire 2003, ISBN 1-85310-294-6 , pp. 63-66.
^ Alec Lumsden: British Piston Engines and their Aircraft. Airlife Publishing, Marlborough, Wiltshire 2003, ISBN 1-85310-294-6 , Appendix 4: Engine Performance Figures
^ Bill Gunston: World Encyclopedia of Aero Engines. Patrick Stephens, Cambridge 1989, ISBN 1-85260-163-9 , p. 18.

literature

Alec Lumsden: British Piston Engines and their Aircraft. Airlife Publishing, Marlborough, Wiltshire 2003, ISBN 1-85310-294-6 .

Web links

Commons : Armstrong Siddeley Jaguar - Collection of images, videos and audio files

[Lumsden-1] A ^b Alec Lumsden: British Piston Engines and their Aircraft. Airlife Publishing, Marlborough, Wiltshire 2003, ISBN 1-85310-294-6 , pp. 63-66.

[Lumsden4-2] Alec Lumsden: British Piston Engines and their Aircraft. Airlife Publishing, Marlborough, Wiltshire 2003, ISBN 1-85310-294-6 , Appendix 4: Engine Performance Figures

[Gunston-3] Bill Gunston: World Encyclopedia of Aero Engines. Patrick Stephens, Cambridge 1989, ISBN 1-85260-163-9 , p. 18.