The Fiat AS.5 was an Italian 12-cylinder, liquid-cooled V engine designed and built in the late-1920s by Fiat especially for the 1929 Schneider Trophy air race.[1]
For the 1929 Schneider Trophy contest Fiat planned a new seaplane to counter the British challengers from Gloster and Supermarine. To minimise frontal area they chose a compact V-12 engine design that set new size standards for a 1,000-horsepower (750 kW) class engine. This unsupercharged engine had a high power-to-weight ratio due to the use of a high compression ratio and a special fuel blend containing a 50/50 mix of petrol and benzole.[2]
A problem encountered with the AS.5 was that it developed maximum power at high crankshaft speeds (3,000 rpm) but lacked output gearing, so that great care had to be taken with the choice of propellers. The production version did feature a reduction gear.[3] The AS.5 was developed into the AS.6, essentially a tandem-coupled combination of two AS.5 units.
Eves, Edward The Schneider Trophy Story. Shrewsbury. Airlife Publishing Ltd., 2001. ISBN1-84037-257-5.
Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN1-85260-163-9
This aircraft engine article is missing some (or all) of its specifications. If you have a source, you can help Wikipedia by adding them.
January 01, 1970
fiat, italian, cylinder, liquid, cooled, engine, designed, built, late, 1920s, fiat, especially, 1929, schneider, trophy, race, type, piston, aero, engine, manufacturer, fiat, first, 1929, major, applications, fiat, developed, into, fiat, contents, design, dev. The Fiat AS 5 was an Italian 12 cylinder liquid cooled V engine designed and built in the late 1920s by Fiat especially for the 1929 Schneider Trophy air race 1 AS 5 Type Piston V 12 aero engine Manufacturer Fiat First run c 1929 Major applications Fiat C 29 Developed into Fiat AS 6 Contents 1 Design and development 2 Applications 3 Specifications AS 5 3 1 General characteristics 3 2 Components 3 3 Performance 4 See also 5 References 5 1 Notes 5 2 BibliographyDesign and development editFor the 1929 Schneider Trophy contest Fiat planned a new seaplane to counter the British challengers from Gloster and Supermarine To minimise frontal area they chose a compact V 12 engine design that set new size standards for a 1 000 horsepower 750 kW class engine This unsupercharged engine had a high power to weight ratio due to the use of a high compression ratio and a special fuel blend containing a 50 50 mix of petrol and benzole 2 A problem encountered with the AS 5 was that it developed maximum power at high crankshaft speeds 3 000 rpm but lacked output gearing so that great care had to be taken with the choice of propellers The production version did feature a reduction gear 3 The AS 5 was developed into the AS 6 essentially a tandem coupled combination of two AS 5 units Applications editFiat C 29Specifications AS 5 editData from Gunston 1 General characteristics Type 12 cylinder V engine Bore 138 mm 5 4 in Stroke 140 mm 5 5 in Displacement 25 13 L 1534 cu in Dry weight 348 kg 767 lb Components Valvetrain Two intake and two exhaust valves per cylinder Fuel system Carburettor Cooling system Liquid cooled Performance Power output 1 000 hp 750 kW at 3 200 rpm Compression ratio 8 1 Power to weight ratio 2 15 kW kg 1 3 hp lb See also editRelated development Fiat AS 6 Comparable engines Curtiss D 12 Fairey Prince V 12 Packard 1A 1500 Rolls Royce Kestrel Related lists List of aircraft enginesReferences editNotes edit a b Gunston 1989 p 57 Eves 2001 p 216 Eves 2001 p 217 Bibliography edit 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 nbsp This aircraft engine article is missing some or all of its specifications If you have a source you can help Wikipedia by adding them Retrieved from https en wikipedia org w index php title Fiat AS 5 amp oldid 1160056465, wikipedia, wiki, book, books, library,
