CNA C-7

C-7
Type	Nine-cylinder radial engine
National origin	Italy
Manufacturer	Compagnia Nazionale Aeronautica (CNA)

The CNA C-7 was a small nine-cylinder supercharged, geared, single row radial engine designed in Italy in the early 1930s.^[1] Three light aircraft class world altitude records were set by the CNA C-7 powered Fiat AS.1 and CNA Eta.^[2]

Applications

CNA Beta^[3]
CNA Eta
Fiat AS.1

Specifications

Data from Jane's All the World's Aircraft 1938^[1]

General characteristics

Bore: 80 mm (3.15 in)
Stroke: 85 mm (3.35 in)
Displacement: 3.85 L (235 cu in)
Dry weight: dry 125 kg (276 lb)
Construction: Aluminium cylinder heads and steel barrels. Cast "Elektron" metal crankcase.

Components

Valvetrain: Two valves per cylinder. An overhead camshaft, driven by a bevel shaft running between each pair of cylinders operated the exhaust valve of one and the inlet valve of the next.
Supercharger: Centrifugal blower running at crankshaft speed.
Fuel system: 1× Memini carburetter
Cooling system: Air
Reduction gear: 3:1
Ignition: Dual ignition: 2× Marelli plugs per cylinder, driven by a different Marelli magneto

Performance

Power output: Normal 134 kW (180 hp) at 4,800 rpm
Compression ratio: 7:1

References

1 2 Grey, C.G. (1972). Jane's All the World's Aircraft 1938. London: David & Charles. p. 68d. ISBN 0715 35734 4.
↑ "FAI records: Niclot - 1932". Retrieved 20 March 2012.
↑ Thompson, Jonathan (1963). Italian Civil and Military Aircraft 1930-1945. Fallbrook, California: Aero Publishers, Inc. pp. 131–2.

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