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

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

• Aeronautica Umbra Trojani AUT.18
• Breda Ba.65
• CANSA FC.20
• CANT Z.509
• Fiat BR.20 Cicogna
• Fiat G.18
• Savoia-Marchetti SM.79 Sparviero

Specifications (A.80 R.C.41)

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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