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Clerget 16X


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. The experimental 16X was a departure from all of these, first run in 1918. 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.


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)
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.
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)



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