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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 Amiens 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)

Specifications (Puma)

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

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

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)

See also

Related development

• ADC Nimbus

Comparable engines

• Austro-Daimler 6
• Benz Bz.III
• Hiero 6
• Mercedes D.IVa

Related lists

• List of aircraft engines

References

Notes

Bibliography

External links

• "The Siddeley Aero Engines: The "Puma"". Flight. XI (14): 429–431. 3 April 1919. No. 536. Retrieved 12 January 2011. Contemporary technical description of the engine with photographs.
• The Virtual Aviation Museum

На других языках

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[de] Siddeley Puma

Der Siddeley Puma war ein Flugmotor des britischen Herstellers Siddeley-Deasy. Der wassergekühlte Sechszylinder-Reihenmotor kam in einer Reihe verschiedener Flugzeuge zum Einbau.

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- [en] Siddeley Puma

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[fr] Siddeley Puma

Le Siddeley Puma était un moteur d'avion britannique développé à la fin de la Première Guerre mondiale et produit par Siddeley-Deasy. Les premiers moteurs ont quitté les lignes de production de Siddeley Deasy, à Coventry en août 1917, la production a continué jusqu'en décembre 1918. Au moins 4 288 des 11 500 moteurs commandés ont été livrés, les commandes ont été annulées à la suite de l'armistice. La production a continué sous le nom Armstrong Siddeley Puma lorsque le fabricant a été acheté par Armstrong Whitworth et est devenu Armstrong Siddeley.

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[it] Siddeley Puma

Il Siddeley Puma era un motore aeronautico a sei cilindri in linea, raffreddati a liquido, sviluppato e prodotto nella seconda metà degli anni dieci del XX secolo dall'azienda britannica Siddeley-Deasy.

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[ru] Siddeley Puma

Siddeley Puma — британский поршневой 6-цилиндровый авиадвигатель жидкостного охлаждения, разработанный в конце Первой мировой войны компанией Siddeley-Deasy.

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