XIV

Isotta Fraschini V.4
Isotta Fraschini V.4b on display at the: Gianni Caproni Museum of Aeronautics
Type	Piston engine
Manufacturer	Isotta Fraschini
First run	1916

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"/"flight"). 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※

• CANT 7
• Caproni Ca.3
• Caproni Ca.30
• Caproni Ca.33
• Caproni Ca.34
• Caproni Ca.35
• Caproni Ca.36
• FBA Type H
• Macchi L.1
• Macchi M.5
• Macchi M.6
• Macchi M.8
• SIAI S.8

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.
• A V.4b is on display in the Polish Aviation Museum.

Specifications (V.4b)※

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

General characteristics

• Type: Six-cylinder, "water-cooled," in-line piston engine
• 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
• Fuel system: Twin carburettors, two six spark magnetos
• Oil system: Forced feed
• Cooling system: Water; cylinders in pairs, each pair in a steel water jacket

Performance

• Power output: 142 kW (190 hp) at 1,450 rpm
• Compression ratio: 4.8

See also※

Related lists

• List of aircraft engines

References※

Notes※

Bibliography※