Fiat AS.2

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

For the aircraft of the same name, see Fiat AS.2 (aircraft)

Fiat AS-2 882hp.png
Type Piston V-12 aero engine
Manufacturer Fiat Aviazione
First run c.1925
Major applications Macchi M.39
Developed from Fiat A.22
Developed into Fiat AS.3

The Fiat AS.2 was an Italian 12-cylinder, liquid-cooled V engine designed and built in the mid-1920s by Fiat Aviazione especially for the 1926 Schneider Trophy air race.[1]

Design and development[edit]

Designed for the 1926 Schneider Trophy contest held at Hampton Roads, Virginia, the AS.2 was inspired by the American Curtiss D-12 engine. Unlike the D-12 the engine featured separate steel cylinders and cast aluminium alloy cylinder heads.[2] The starting point for the Italian engine was the earlier Fiat A.22.[3] The 'S' in AS stood for 'Spinto' (thrust). A weakness of the engine was its magnesium alloy pistons, a new engineering material at the time. Many pistons were holed. Despite the engine's technical problems it was successful at the Schneider Trophy event, winning on 13 November 1926, with a second AS.2 powered aircraft placing third.[4]


Specifications (AS.2)[edit]

Data from Eves[5]

General characteristics

  • Type: 12-cylinder V-engine
  • Bore: 140 mm (5.5 in)
  • Stroke: 170 mm (6.7 in)
  • Displacement: 30.955 litres (1,889 cu in)
  • Width: 720 mm
  • Height: 850 mm
  • Dry weight: 408 kg (900 lb)


  • Valvetrain: Two intake and two exhaust valves per cylinder
  • Fuel system: Carburettor
  • Cooling system: Liquid-cooled


See also[edit]

Comparable engines

Related lists



  1. ^ Eves 2001, p. 214.
  2. ^ Eves 2001, p. 243.
  3. ^ Jane's All the World's Aircraft 1938
  4. ^ Eves 2001, p. 243.
  5. ^ Eves 2001, p. 215.


  • Grey, C.G. (1972). Jane's All the World's Aircraft 1938. London: David & Charles. pp. 68–9d. ISBN 0715 35734 4.
  • Eves, Edward The Schneider Trophy Story. Shrewsbury. Airlife Publishing Ltd., 2001. ISBN 1-84037-257-5.
  • Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9