Alfa Romeo 122

Alfa Romeo 122
Type	Piston aircraft engine
Manufacturer	Alfa Romeo
First run	1941
Developed from	Walter Sagitta

The Alfa Romeo 122 was a 12-cylinder inverted-V aircraft engine produced in 1941 by Alfa Romeo Milano as a licence-built Czechoslovak Walter Sagitta, featuring a single-speed supercharger. The 122 R.C.38 major production variant had a reduction gearbox, single stage supercharger and rated altitude of 3,800 m (12,500 ft).

Specifications

General characteristics

• Type: 60° 12-cylinder inverted V-12 air-cooled engine
• Bore: 118 mm (4.6 in)
• Stroke: 140 mm (5.5 in)
• Displacement: 18.6 L (1,135.04 cu in)
• Length: 1,790 mm (70.5 in)
• Width: 725 mm (28.5 in)
• Height: 781 mm (30.7 in)

Components

• Supercharger: Centrifugal compressor, diameter 210 mm (8.3 in)
• Cooling system: Air cooling

Performance

• Power output: 368 kW (493 hp) at 3,800 m (12,500 ft)

See also

Related development

• Walter Sagitta

Comparable engines

• Argus As 410
• Argus As 411
• de Havilland Gipsy Twelve
• Isotta Fraschini Gamma
• Junkers Jumo 210
• Ranger V-770
• Renault 12R
• Walter Sagitta

Related lists

• List of aircraft engines

Bibliography

• Archivio Storico Alfa Romeo - Volume II. Torino, novembre 1998.