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

Design and development

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)

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

Components

• 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

Performance

• Power output: 149 kW (200 hp)

See also

Comparable engines

• RAF 4

Related lists

• List of aircraft engines

References

Bibliography

• 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