Fiat A.20

The Fiat A.20 was an Italian aero-engine of the 1920s. It was a water-cooled V12 engine that was used by early versions of the Fiat CR.20 fighter and the Macchi M.41 seaplane.

A.20
Type Water-cooled V12 engine
National origin Italy
Manufacturer FIAT
Major applications Fiat CR.20
Macchi M.41

In 1923, FIAT built the A.15, a 430 hp (320 kW) water-cooled V12 engine. While no production of the A.15 ensued, it formed the basis for the Fiat A.20, which differed in being a Monobloc engine, and delivered a similar power despite a reduction in capacity from 20.3 to 18.7 L (1,239 to 1,141 in3).[1]

Variants
A.20
Normal compression (5.7:1 compression)[2]
A.20 S.
High compression version (6:1 compression)[2]
A.20 AQ.
(AQ - Alta Quota - high altitude) High altitude version (8:1 compression)[2]

Applications

Specifications (A.20)

Data from The Fiat A.20,[5]Jane's all the World's Aircraft 1928.[2]

General characteristics
  • Type: Water-cooled 60° V-12
  • Bore: 115 mm (4.53 in)
  • Stroke: 150 mm (5.91 in)
  • Displacement: 18.7 L (1,141 in3)[6]
  • Length: 1,645 mm (64.76 in)
  • Width: 645 mm (25.39 in)
  • Height: 845 mm (33.27 in)
  • Dry weight: 340 kg (749.6 lb)

Components
  • Valvetrain: Overhead camshafts operating two inlet and two exhaust valves per cylinder via rockers
  • Fuel system: Two twin carburettors
  • Cooling system: water-cooled

Performance
  • Power output: **A.20 460 hp (343.0 kW) at 2,300 rpm
    • A.20S 510 hp (380.3 kW) at 2,400 rpm
    • A.20AQ 430 hp (320.7 kW) at 2,060 rpm maximum continuous; 540 hp (402.7 kW) at 2,400 rpm maximum momentary output
  • Compression ratio: **A.20 5.7:1
    • A.20S 6:1
    • A.20AQ 8:1
  • Specific fuel consumption: 0.528 lb/(hp⋅h) (0.321 kg/kWh)

See also

Related lists

References
  1. Gunston, Bill (2006). World Encyclopaedia of Aero Engines (5th ed.). Stroud: Sutton Publishing. pp. 72–74. ISBN 978-0-7509-4479-3.
  2. Grey, C.G., ed. (1928). Jane's all the World's Aircraft 1928. London: Sampson Low, Marston & company, ltd. p. 45d-46d.
  3. Taylor, Michael J.H. (1981). Warplanes : of the world 1918–1939. London: Ian Allan. p. 54. ISBN 0-7110-1078-1.
  4. Angelucci, Enzo, ed. (1981). World encyclopedia of military aircraft. London: Jane's. p. 124. ISBN 0-7106-0148-4.
  5. Flight 6 May 1926, p.275.
  6. Flight 9 December 1926, p.807.
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