Siddeley Puma

Siddeley-Deasy Puma at Canada Aviation Museum

The Siddeley Puma was a British aero engine developed towards the end of World War I and produced by Siddeley-Deasy. The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located World War I (abbreviated WWI; also known as the First World War, the Great War, and the War to End All Siddeley-Deasy ( Deasy Motor Company from 1906 to 1912 was a British automobile company based in Coventry in the early 20th century The first engines left the production lines of Siddeley-Deasy in Coventry in August 1917 and the production continued until December 1918. Coventry ( is a city and Metropolitan borough in the County of West Midlands in England. At least 4,288 of the 11,500 ordered engines were delivered, then the orders were cancelled following the Armistice. The armistice treaty between the Allies and Germany was signed in a railway carriage in Compiègne Forest on November 11, 1918 Production was continued under the name Armstrong Siddeley Puma when the manufacturer was bought by Armstrong Whitworth and became Armstrong Siddeley. Sir W G Armstrong Whitworth & Co Ltd was a major British manufacturing company of the early years of the 20th century Armstrong Siddeley was a British engineering group that operated during the first half of the 20th century

Specific Uses

• The Puma engine was used in the British World War I bomber aircraft, the Airco D.H.9. World War I (abbreviated WWI; also known as the First World War, the Great War, and the War to End All The Airco DH9 (from de Havilland 9 also known after 1920 as the de Havilland DH At the time, the unit was unproven and in use proved to be highly troublesome making the aircraft significantly inferior to the type it replaced. The engine was also installed untidily, with the cylinder heads protruding. The D. H. 9, as a type, was improved by replacing the Puma engine with the Liberty 12 to make the D.H.9A. See also Liberty L-8 for the eight-cylinder prototype & Lincoln Liberty engine WikipediaWikiProject Aircraft The Airco DH9A was a British light bomber designed and first used shortly before the end of the First World War. ^[1]

• The unit was used in the first prototype of the Airco DH.10 in a twin-engined pusher configuration but as performance was unsatisfactory, alternative engines were used in a subsequent prototype of the type and production models. WikipediaWikiProject Aircraft. Please see WikipediaWikiProject Aircraft/page content for recommended layout

Specifications

General characteristics

• Type: 6-cylinder water-cooled inline aircraft piston engine
• Bore: 5. Usually found in 4- and 6- cylinder configurations the straight engine (often designated Inline engines is an Internal-combustion engine with all cylinders 7 in (145 mm)
• Stroke: 7. 5 in (190 mm)
• Displacement: 1,147 in³ (18. 8 L)
• Dry weight: 530 lb (240 kg)

Components

• Fuel system: Carburettor
• Cooling system: Water-cooled

Performance

• Power output:
  
  • 187 hp (140 kW) at 1,300 rpm for cruise
  • 243 hp (181 kW) at 1,450 rpm for short-term maximum power
• Specific power: 0. A carburetor (North American spelling or carburettor ( Commonwealth spelling) is a device that blends air and Fuel for an Internal In Engineering, the term specific power can refer to power either per unit of Mass, Volume or Area, although power per unit of 21 hp/in³ (9. 6 kW/L)
• Fuel consumption:
  
  • 14 US gal/h (54 L/h) at cruise
  • 67 US gal/h (258 L/h) at short-term maximum power
• Power-to-weight ratio: 0. Power-to-weight ratio (specific power is a calculation commonly applied to Engines and other mobile power sources to enable the comparison of one unit or design to another 46 hp/lb (0. 75 kW/kg)

References

• The Virtual Aviation Museum

1. ^ Munson, Kenneth "Aircraft of World War I". Ian Allan 1967. ISBN 0-7110-0356-4

See also

• List of aircraft engines