Fiat A.80

A.80
Type	Radial engine
National origin	Italy
Manufacturer	Fiat
Major applications	Breda Ba.65; Fiat BR.20 Cicogna; Fiat G.18; Savoia-Marchetti SM.79 Sparviero; ;
Developed from	Fiat A.74
Developed into	Fiat A.82

The Fiat A.80 was an 18-cylinder, twin-row, air-cooled, radial aircraft engine produced during World War II. Rated at 750 kW (1,000 hp), it was a more powerful development of the 14-cylinder Fiat A.74.

Variants

Fiat A.80 R.C.20: With reduction gear and supercharger, rated altitude 2,000 m (6,600 ft).
Fiat A.80 R.C.40: With reduction gear and supercharger, rated altitude 4,000 m (13,000 ft).
Fiat A.80 R.C.41: With reduction gear and supercharger, rated altitude 4,100 m (13,500 ft).

Applications

Specifications (A.80 R.C.41)

Data from ^{[citation needed]}

General characteristics

Type: 18-cylinder air-cooled radial
Bore: 140 mm (5.51 in)
Stroke: 165 mm (6.50 in)
Displacement: 45.72 L (2789.9 cu in)
Length: 1,155 mm (45.47 in)
Width: 653 mm (25.71 in)
Height: 1,335 mm (52.56 in)
Dry weight: 725 kg (1598.4 lb)

Components

Valvetrain: One intake and one sodium-cooled exhaust valve per cylinder
Supercharger: Single Speed, Single Stage. 4,100 m rated altitude
Fuel system: 1 Fiat carburettor
Fuel type: 87 octane
Cooling system: air-cooled

Performance

Power output: 750 kW (1,000 hp) at 2,100 rpm at 4,100 m (13,500 ft)
820 kW (1,100 hp) at 2,100rpm at Sea Level
Compression ratio: 6.7:1
Power-to-weight ratio: 1.0 kW/kg (0.6 hp/lb) at cruise speed

References

Gunston, Bill. (1986). World Encyclopaedia of Aero Engines. Patrick Stephens: Wellingborough. p. 56
Ragazzi, Paolo (1938). The Power of Aircraft Engines at Altitude. p. 3