Fiat A.20

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

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.

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)

References

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

External links

"The Fiat A.20". Flight, 6 May 1926. p. 275.
"The Fiat Engines". Flight, 9 December 1926, p. 807.

[Gunston-1] Gunston, Bill (2006). World Encyclopaedia of Aero Engines (5th ed.). Stroud: Sutton Publishing. pp. 72–74. ISBN 978-0-7509-4479-3.

[JAWA1928-2] Grey, C.G., ed. (1928). Jane's all the World's Aircraft 1928. London: Sampson Low, Marston & company, ltd. p. 45d-46d.

[Taylor-3] Taylor, Michael J.H. (1981). Warplanes : of the world 1918–1939. London: Ian Allan. p. 54. ISBN 0-7110-1078-1.

[Angel_p124-4] Angelucci, Enzo, ed. (1981). World encyclopedia of military aircraft. London: Jane's. p. 124. ISBN 0-7106-0148-4.

[Flight_26_p275-5] Flight 6 May 1926, p.275.

[Flight_26_p807-6] Flight 9 December 1926, p.807.

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