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Fiat A.54




The Fiat A.54 was a seven-cylinder, air-cooled radial engine developed in Italy in the 1930s as a powerplant for aircraft. Amongst others, it powered the Ambrosini SAI.1 and SAI.2 racing aircraft.


Ambrosini SAI.1
Ambrosini SAI.2
Caproni Ca.100
Fiat G2.4
Jona J-6


Type: 7-cylinder air-cooled radial
Bore: 105 mm (4.13 in)
Stroke: 120 mm (4.72 in)
Displacement: 7.27 L (443.9 cu in)
Length: 1,770 mm (69.69 in)
Width: 734 mm (28.93 in)
Height: 1,065 mm (41.93 in)
Dry weight: 150 kg (330.7 lb)
Valvetrain: One intake and one sodium-cooled exhaust valve per cylinder
Fuel system: 1 Stromberg carburettor
Fuel type: 74 octane
Cooling system: Air-cooled
Power output: 140 hp (104 kW) at 2,100 rpm
Compression ratio: 5.5:1
Power-to-weight ratio: 0.42 hp/lb (0.7 kW/kg)



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