Sunbeam Spartan
The Sunbeam Spartan was a British 12-cylinder aero-engine designed and built in 1916. 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   and stroke of , capacity of  and output of  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. Specifications (Spartan)

See also

References

Bibliography
 
 Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. . External links
 

Spartan
1910s aircraft piston engines
V12 aircraft engines