Isotta Fraschini V.5

The Isotta Fraschini V.5 of 1916 was an Italian eight-cylinder, water-cooled, in-line piston aero engine of World War I. The "V" denoted "Volo" or "flight" rather than piston arrangement.

Design

The V.5's construction was fairly typical of aircraft engines of the period with cast-iron cylinders mounted in pairs with common heads and water jackets. It had much in common with the six-cylinder Isotta Fraschini V.4 and was built at a similar time. Though powerful, it was very heavy and thus, like some other Isotta Fraschini engines, better suited to airships than aircraft.

Applications

• Forlanini airship

Specifications

Data from Jane's Fighting Aircraft of World War I (2001)

General characteristics

• Type: 8-cylinder inline
• Bore: 130 mm (5.12 in)
• Stroke: 180 mm (7.09 in)
• Displacement: 19 L (1,165 cu in)
• Length: 1,990 mm (78.3 in)
• Width: 600 mm (23.6 in)
• Height: 1,010 mm (39.8 in)
• Dry weight: 351 kg (774 lb)

Components

• Valvetrain: Overhead camshaft
• Fuel system: Twin carburettors, twin eight spark magnetos
• Oil system: Forced feed
• Cooling system: water; cast-iron cylinders in pairs, each pair in a steel water jacket
• Reduction gear: direct

Performance

• Power output: 183 kW (245 hp) at 1,400 rpm

References