Fiat AS.3
{{short description|1920s Italian piston aircraft engine}}
| {{Infobox Aircraft Begin
|name= AS.3 |image = FIAT A.S.3.jpg |caption = }} {{Infobox Aircraft Engine |type= Piston V-12 aero engine |national origin = |manufacturer= Fiat Aviazione |first run=c.1927 |major applications= Macchi M.52 |number built = |program cost = |unit cost = |developed from =Fiat AS.2 |developed into = |variants with their own articles = }} |
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.Eves 2001, p. 216.
Two AS.3 powered aircraft placed joint second at the 1927 contest, the winning aircraft was a Napier Lion- powered Supermarine S.5.Eves 2001, p. 244. The AS.3 engine was also used at the 1929 competition, again taking second place.Eves 2001, p. 245.
Applications
Specifications (AS.3)
File:Macchi M.52 (16761403979).jpg with engine cowlings removed]]
{{pistonspecs
|
|ref=Jane's.Grey 1928, p. 47d.
|type=12-cylinder V-engine
|bore={{convert|145|mm|in|1|abbr=on}}
|stroke={{convert|175|mm|in|1|abbr=on}}
|displacement={{convert|34.6|L|cuin|1|abbr=on}}
|length=
|diameter=
|width={{convert|720|mm|in|1|abbr=on}}
|height={{convert|850|mm|in|1|abbr=on}}
|weight={{convert|423|kg|lb|abbr=on}}
|valvetrain=Two intake and two exhaust valves per cylinder
|supercharger=
|turbocharger=
|fuelsystem=Carburettor
|fueltype=Straight aviation petrol
|oilsystem=
|coolingsystem=Liquid-cooled
|power={{convert|746|kW|hp|abbr=on}} at 2,400 rpm
|specpower=
|compression=6.7:1
|fuelcon=
|specfuelcon=
|oilcon=
|power/weight=1.76 kW/kg (1 hp/lb)
}}
See also
{{aircontent
|see also=
|related=
|similar aircraft=
|lists=
|similar engines=
}}
References
{{Commons category}}
=Notes=
{{reflist}}
=Bibliography=
{{refbegin}}
- 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
{{refend}}
{{Fiat aeroengines}}