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The Alfa Romeo D2 was a nine-cylinder radial engine for aircraft use produced in Italy. It was typically rated between 240 and 270 hp. The engine was designed by Vittorio Jano, 600 units were produced between 1931 and 1934.[1] This engine was also the first purpose-built aircraft engine produced by Alfa Romeo, previous Alfa engines used in aircraft were derived from engines used in cars. A supercharged derivative was produced as the D2 C.30.[2]

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
• Jona J-6S

Specifications (D2 C.30)

Data from Jane's.[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

See also

Related lists

• List of aircraft engines

References

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На других языках

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- [en] Alfa Romeo D2

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[fr] Alfa Romeo D2

Le moteur Alfa Romeo D.2 « Dux » est un moteur d'avion en étoile, refroidi par air et produit par le constructeur italien Alfa Romeo Avio entre les années 1930 et 1934. C'est le premier moteur d'avion conçu et fabriqué intégralement par Alfa Romeo.

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[it] Alfa Romeo D2

L'Alfa Romeo D2 "Dux" era un motore radiale aeronautico a 9 cilindri a singola stella prodotto dall'azienda italiana Alfa Romeo Milano negli anni trenta.

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[ru] Alfa Romeo D2

Alfa Romeo D2 — итальянский поршневой 9-цилиндровый авиадвигатель воздушного охлаждения, разработанный конструктором компании Alfa Romeo Витторио Яно. Первый двигатель компании, разработанный как авиационный (предыдущие были модификациями автомобильных моторов). Существовала версия с нагнетателем — D2 C.30[1]. Всего в период 1931 — 1934 годов было выпущено около 600 D2[2].

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