Clerget 16X

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The Clerget 16X was an experimental French 16-cylinder X engine built in about 1918.

Design

Clerget are best known for their well engineered rotary engines produced from 1911 to the end of World War I in 1918, the first of their type to deliver fuel-air mixture to the cylinder heads by external induction tubes via externally push rod operated inlet valves. They later made a series of static radial aircraft diesel engines.^[1]^[2]^[3] The experimental 16X was a departure from all of these; despite contemporary descriptions as a radial engine, it was in more modern terms an X-type, four stroke water-cooled petrol engine, essentially two 90° V-8 cylinder engines, one inverted, coupled to a common output shaft.^[1]

Specifications

Data from Jane's Fighting Aircraft of World War I^[1]^[4]

General characteristics

Type: 16-cylinder X-type piston engine, with four 4-cylinder banks separated by 90°. Single sparking plug on the upper side of each cylinder.
Bore: 130 mm (5.1 in)
Stroke: 130 mm (5.1 in)
Displacement: 27.6 l (1,684.26 cu in)
Length: 1,306 mm (51.42 in)
Diameter: 512 mm (20.16 in)
Dry weight: 340.2 kg (750 lb)

Components

Valvetrain: Two overhead valves per cylinder, each operated via a long push-rod worked by one camshaft per cylinder bank. Side inlet and exhaust ports.
Fuel system: Separate carburettors mounted between upper and between lower cylinder bank, each feeding their pairs of banks. Single sparking plug in upper side of each cylinder.
Fuel type: Petrol
Cooling system: Water, centrifugally pumped.

Performance

Power output: 313 kW (419.74 hp) at 1,600 rpm
Compression ratio: 5:1
Fuel consumption: 0.48 l/kW/h (0.079 imp gal/hp/h; 0.095 US gal/hp/h)
Oil consumption: 0.038 l/kW/h (0.0063 imp gal/hp/h; 0.0076 US gal/hp/h))

References

↑ 1.0 1.1 1.2 Taylor, 2001, p.279
↑ Gunston, 1989, p.41
↑ Lumsden, 1994, p.133
↑ Grey, 1969, pp.1b-145b

Bibliography

Gunston, Bill (1989). World Encyclopaedia of Aero Engines (2 ed.). Wellingborough: Patrick Stephens Ltd. p. 41. ISBN 1-85260-163-9.

Lumsden, Alec (1994). British Piston Aero-engines and their Aircraft. Shrewsbury: Airlife. p. 133. ISBN 978-1-85310-294-3.

Taylor, Michael (2001). Jane's fighting aircraft of World War 1. London: Jane's Publishing Company. p. 279. ISBN 978-1-85170-347-0.

Grey, C.G. (1969). Jane's All the World's Aircraft 1919 (Facsimile ed.). David & Charles (Publishing) Limited. pp. 1b to 145b. ISBN 978-0-7153-4647-1.

v t e Clerget aircraft engines

Rotary engines	7Z 9B 9Bf 9Z 11Eb

Radial diesel engines	9A 14F

'H' engines	Type Transatlantique

'X' engines	16X

See also: Clerget aircraft engines

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