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.