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Compagnia Nazionale Aeronautica / CNA C.II


The CNA C.II was a small, air-cooled, two cylinder horizontally opposed aircraft engine designed and built in Italy from 1937-41.

The low power, unsupercharged C.II had offset cylinders with special steel barrels and light alloy cylinder heads. The pistons were light alloy castings; the connecting rods were heat treated chrome-nickel steel, with split big ends. The CN.II had a one piece chrome-nickel steel crankshaft ruuning in two roller bearings, with a ball thrust bearing. The crankcase was a one piece light alloy casting.

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Bore: 90 mm (3.54 in)
Stroke: 110 mm (4.33 in)
Displacement: 1.4 L (85.4 cu in)
Length: 478 mm (18.81 in)
Width: 856 mm (33.70 in)
Height: 526 mm (20.71 in)
Dry weight: dry 42 kg (92.6 lb)
Valvetrain: Large diameter overhead valves, one inlet and one exhaust per cylinder. Enclosed rocker gear operated by push-rods driven off upper crankcase camshaft.
Oil system: Wet sump; crankshaft fed pressurised oil by pump.
Cooling system: Air
Power output: rated 28 kW (38 hp) at 2,700 rpm at sea level



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