Siddeley Puma

The Siddeley Puma was a British aero engine developed towards the end of World War I and produced by Siddeley-Deasy. The first engines left the production lines of Siddeley-Deasy in Coventry in August 1917, production continued until December 1918. At least 4,288 of the 11,500 ordered engines were delivered, orders were cancelled following the Armistice. Production was continued under the name Armstrong Siddeley Puma when the manufacturer was bought by Armstrong Whitworth and became Armstrong Siddeley.

Puma
Siddeley Puma
Type Inline engine
National origin United Kingdom
Manufacturer Siddeley-Deasy
First run 1917
Major applications Airco D.H.9
Developed into ADC Nimbus

The engine was based on a previous B.H.P engine which was also developed as the Galloway "Adriatic."

Applications
  • The Puma engine was used in the British World War I bomber aircraft, the Airco D.H.9. In use it 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.[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.
  • Short Silver Streak (1920)
  • Vickers 6-Ton light tank

Specifications (Puma)
Siddley Puma in National Military Museum, Romania.

Data from Lumsden[2]

General characteristics

  • Type: 6-cylinder water-cooled inline aircraft piston engine
  • Bore: 5.71 in (145 mm)
  • Stroke: 7.48 in (190 mm)
  • Displacement: 1,149 in³ (18.832 L)
  • Length: 69.9 in (1,175 mm)
  • Width: 24 in (610 mm)
  • Height: 43.6 in (1,107 mm)
  • Dry weight: 645 lb (293 kg)

Components

Performance

  • Power output:
  • 250 hp (186 kW) at 1,400 rpm for takeoff
  • 265 hp (198 kW) at 1,500 rpm for short-term maximum power
  • Specific power: 0.23 hp/in³ (10.5 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: 0.41 hp/lb (0.67 kW/kg)
gollark: Wikipedia notes misuse of *non-*mass surveillance in past. Spying on everyone and everything they do online will make it worse.https://en.m.wikipedia.org/wiki/Mass_surveillance_in_the_United_States
gollark: Oh, this too:- ignoring relevant laws and gathering data anyway until new laws can retroactively allow it- getting around limits on spying on citizens by sharing data with other "Five Eyes" nations and spying on them as foreigners
gollark: Well, it's pretty known that they do go around intercepting lots of stuff. There are many problems with this:- having private data like your internet traffic stored somewhere is kind of bad in itself.- if it's not abused yet it's basically only a matter of time.- there's no transparency anywhere and even a system of secret courts to judge things- it may help slightly to stop terrorists (no transparency so we can't check really) but is just a massive breach of privacy
gollark: GNU+Windows?
gollark: We'll see who's a fool when I backtrace your IP with Visual Basic!

See also
Siddeley-Deasy Puma at the Canada Aviation Museum

Related development

Comparable engines

Related lists

References

Notes
  1. Munson, Kenneth "Aircraft of World War I". Ian Allan 1967. ISBN 0-7110-0356-4
  2. Lumsden 2003, p. 86

Bibliography
  • Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.