Sunbeam Spartan
# 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 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.

## Specifications (Spartan)

Data from Sunbeam Aero-Engines

### 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)
