Sunbeam Spartan

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Type V-12 air-cooled piston engine
National origin Britain
Manufacturer Sunbeam[1]
Designed by Louis Coatalen[1]
Major applications Saunders T.1[1]
Produced 1917[1]
Number built prototypes only

The Sunbeam Spartan was a British 12-cylinder aero-engine designed and built in 1916.[1]

Design and development[edit]

Louis Coatalen concentrated on water-cooled engines for the most part, but did design an air-cooled V-12 named Spartan. Little is known of this engine which had a bore of 105 mm (4 in) and stroke of 130 mm (5 in), capacity of 14.03 l (856 cu in) and output of 149 kW (200 hp) driving a propeller through a reduction gearbox. The single overhead camshaft operated two inlet and two exhaust valves per cylinder via rockers and ignition was supplied by two 6-cyl. Magnetos supplying spark to one spark-plug per cylinder.[1]

Specifications (Spartan)[edit]

Data from Sunbeam Aero-Engines[1]

General characteristics

  • Type: V-12 air-cooled piston engine
  • Bore: 105 mm (4 in)
  • Stroke: 130 mm (5 in)
  • Displacement: 14.03 l (856 cu in)
  • Designer: Louis Coatalen


  • Valvetrain: Single overhead camshaft, two exhaust and two inlet valves per cylinder
  • Fuel system: gravity fed
  • Fuel type: Gasoline
  • Oil system: Dry sump, pressure fed
  • Cooling system: Air-cooled
  • Reduction gear: ratio not known


  • Power output: 149 kW (200 hp)

See also[edit]

Comparable engines
Related lists


  1. ^ a b c d e f g Brew, Alec (1998). Sunbeam Aero-engines. Shrewsbury: Airlife Publishing. ISBN 1-84037-023-8. 


  • The Illustrated Encyclopedia of Aircraft. London: Aerospace Publishing. 
  • Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.
  • Brew, Alec (1998). Sunbeam Aero-engines. Shrewsbury: Airlife Publishing. ISBN 1-84037-023-8. 

External links[edit]