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Fiat AS.3

From Wikipedia, the free encyclopedia

AS.3
Type Piston V-12 aero engine
Manufacturer Fiat Aviazione
First run c.1927
Major applications Macchi M.52
Developed from Fiat AS.2

The Fiat AS.3 was an Italian 12-cylinder, liquid-cooled V engine designed and built in the mid-1920s by Fiat Aviazione especially for the 1927 Schneider Trophy air race.

Design and development

The AS.3 was an increased bore and stroke version of the Fiat AS.2 developed for the 1927 Scheider Trophy seaplane race held at Venice. Despite the increase in capacity the engine retained the same height and frontal area as the AS.2, this was achieved by shortening the connecting rods.[1]

Two AS.3 powered aircraft placed joint second at the 1927 contest, the winning aircraft was a Napier Lion- powered Supermarine S.5.[2] The AS.3 engine was also used at the 1929 competition, again taking second place.[3]

Applications

Specifications (AS.3)

Macchi M.52 with engine cowlings removed

Data from Jane's.[4]

General characteristics

  • Type: 12-cylinder V-engine
  • Bore: 145 mm (5.7 in)
  • Stroke: 175 mm (6.9 in)
  • Displacement: 34.6 L (2,111.4 cu in)
  • Width: 720 mm (28.3 in)
  • Height: 850 mm (33.5 in)
  • Dry weight: 423 kg (933 lb)

Components

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

Performance

See also

Related development

Comparable engines

Related lists

References

Wikimedia Commons has media related to Fiat AS.3.

Notes

  1. ^ Eves 2001, p. 216.
  2. ^ Eves 2001, p. 244.
  3. ^ Eves 2001, p. 245.
  4. ^ Grey 1928, p. 47d.

Bibliography

  • Eves, Edward The Schneider Trophy Story. Shrewsbury. Airlife Publishing Ltd., 2001. ISBN 1-84037-257-5.
  • Grey, C.G. Jane's all the World's Aircraft 1928. London. Sampson Low, Marston & company Ltd. 1928
This page was last edited on 14 June 2023, at 04:56
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