Alfa Romeo D2
The Alfa Romeo D2 was a nine-cylinder radial engine for aircraft use produced in Italy. It was typically rated between 240-270 hp. The engine was designed by Vittorio Jano and produced 600 units between 1931-1934.[1] This engine was also first purpose-built aircraft engine produced by Alfa Romeo, before it all Alfa engines used in airplanes were derived from engines used in cars. A supercharged derivative was produced as the D2 C.30.[2]
D2C supercharged derivative
| Alfa Romeo D2 | |
|---|---|
 | |
| Type | nine-cylinder radial engine |
| Manufacturer | Alfa Romeo |
| First run | 1930s |
| Number built | ~600 |
Applications
- Breda Ba.25
- Caproni Ca.101
- Caproni Ca.105
- J-6S variant of the Jona J-6
Specifications (D2 C.30)
Data from [2]
General characteristics
- Type: Nine-cylinder radial engine
- Bore: 120 mm (4.72 in)
- Stroke: 135 mm (5.31 in)
- Displacement: 13.74 l (838.47 cu in)
- Dry weight: 275 kg (606 lb)
Components
- Valvetrain: dual cam ring driving 2 overhead valves per cylinder via push-rods and rockers
- Supercharger: 2.5:1
- Fuel system: Memini carburettor with automatic servo-boost control
- Oil system: dual gear pumps
- 2x Marelli MF.9 magnetos
Performance
- Power output: normal 205 kW (275 hp) at 2,000 rpm at 2,500 m (8,200 ft); maximum 230 kW (310 hp) at 2,200 rpm at 2,250 m (7,380 ft)
- Compression ratio: 5:1
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References
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Wikimedia Commons has media related to Alfa Romeo D2. |
- "STORY OF THE ALFA ROMEO FACTORY AND PLANTS page 12" (PDF). enzociliberto.it. Archived from the original (PDF) on 2007-09-29. Retrieved 2007-08-25.
- Jane's All the World's Aircraft 1937. London: Sampson, Low & Martin company Limited. 1937. p. 67d.
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