Girish Mahajan (Editor)

Armstrong Siddeley Serval

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The Armstrong Siddeley Serval was a British ten-cylinder aero engine developed by Armstrong Siddeley in the late 1920s. Following the company tradition the engine was named after the Serval wild cat.

Contents

Design and development

The Serval was a ten-cylinder, double-row, air-cooled radial piston engine. It was developed from the Armstrong Siddeley Mongoose and was, more or less, two Mongooses built around a single crankcase. In fact, it first appeared as the Double Mongoose in May 1928.

Built in several variants, power output was about 340 hp (254 kW).

Variants

Serval I initially Double Mongoose

(1931) 340 hp.
Serval III
(1932)
Serval IIIB
(1932) 310 hp.
Serval IV
310 hp.
Serval V
(1933) 340 hp.

Applications

  • Airco DH.9
  • Armstrong Whitworth Atalanta
  • BFW M.36
  • Canadian Vickers Vancouver
  • Fairey Fox
  • ICAR Comercial
  • Saro Cloud

    • Specifications (Serval I)

    Data from Lumsden.

    General characteristics

  • Type: 10-cylinder double-row radial
  • Bore: 5 in (127 mm)
  • Stroke: 5.5 in (139.7 mm)
  • Displacement: 1,080 cu in (17.7 L)
  • Length: 54.25 in (1,378 mm)
  • Diameter: 45.6 in (1,158 mm)
  • Dry weight: 714 lb (324 kg)

    • Components

  • Valvetrain: Overhead poppet valves
  • Fuel type: 77 Octane petrol
  • Cooling system: Air-cooled
  • Reduction gear: Direct drive, Left hand tractor

    • Performance

  • Power output: 340 hp at 2,000 rpm at sea level
  • Compression ratio: 5:1
  • Power-to-weight ratio: 0.47 hp/lb

    • References

    Armstrong Siddeley Serval Wikipedia
    (Text) CC BY-SA