Isotta Fraschini V.4

Isotta Fraschini V.4
Type	Piston engine
Manufacturer	Isotta Fraschini
First run	Template:Avyear

The Isotta Fraschini V.4 of 1916 was an Italian six-cylinder, water-cooled, in-line piston aero engine of World War I (the "V" denoted "Volo" or "flight").^[1] Its construction was fairly typical of aircraft engines of the period with six cast-iron cylinders mounted in pairs with common heads. This engine was also produced by Alfa Romeo.

Applications

Variants

V.4

V.4A
V.4B
V.4Bb

Engines on display

A V.4b is on display in the Gianni Caproni Museum of Aeronautics
The Caproni Ca.36 on display in the National Museum of the United States Air Force is fitted with a V.4b engine.

Specifications (V.4b)

Data from Jane's Fighting Aircraft of World War I (2001);^[2] Gianni Caproni Museum of Aeronautics placard description

General characteristics

Type: Six-cylinder, water-cooled, in-line piston engine^[2]
Bore: 130 mm (5.12 in)
Stroke: 180 mm (7.09 in)
Displacement: 14.3 L (874 cu in)
Length: 1,470 mm (58 in)
Width: 460 mm (18.11 in)
Height: 1,020 mm (40.15 in)
Dry weight: 264 kg (584 lb)

Components

Valvetrain: Overhead camshaft^[2]
Fuel system: Twin carburettors, two six spark magnetos^[2]
Oil system: Forced feed^[2]
Cooling system: Water; cylinders in pairs, each pair in a steel water jacket^[2]

Performance

Power output: 142 kW (190 hp) at 1,450 rpm^[2]
Compression ratio: 4.8

References

Notes

^ Gunston 1989, p. 82.
^ ^a ^b ^c ^d ^e ^f ^g Jane's (2001)

Bibliography

Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
Taylor, Michael (2001). Jane's Fighting Aircraft of World War I. London: Jane's Publishing Company. p. 290. ISBN 1-85170-347-0.

[1] Gunston 1989, p. 82.

[Janes-2] ^ ^a ^b ^c ^d ^e ^f ^g Jane's (2001)

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