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The Alfa Romeo 115 was an Italian six-cylinder air-cooled inverted inline engine for aircraft use, mainly for training and light planes, based on the de Havilland Gipsy Six engine. Production totalled approximately 1,600 units. Derivatives of the 115 include the -1, bis, ter and Alfa Romeo 116.[1]

Alfa Romeo 115
Alfa Romeo 115
Type	Piston aircraft engine
Manufacturer	Alfa Romeo
First run	1930s
Number built	115 ~1,600

Description

The Alfa Romeo 115 series of engines closely follows the original de Havilland Gipsy Six engines in having one-piece Elektron casting crankcases with cover plates, steel cylinders, finned for cooling, and detachable aluminium alloy cylinder heads. The six-throw one-piece counterbalanced crankshaft is carried in seven plain journal bearings and the propeller is driven directly by the crankshaft.

Variants

110ter

4-cylinder version of the 115ter

115-1 (115-I)

115bis (115-2 / 115-II)

115ter (115-3 / 115-III)

116-1 (116-I)

The 115 bored out to 120 mm (4.72 in) developing 164.05 kW (220 hp) at 2,360 rpm, otherwise similar.[1][2]

Applications

• Ambrosini SAI.3
• Bestetti BN.1 (one prototype)
• Breda Ba.75 (prototypes)
• Breda Ba.79S
• CANT Z.1012 (or 110)
• Caproni Ca.164
• Nardi FN.305
• Nardi FN.315
• Saiman 200
• Ambrosini SAI.2S (115-1)
• Caproni Ca.309 Ghibli (115bis)
• Fiat G.46-1B (115bis)[3]
• Fiat G.46-3B (115bis)
• Fiat G.46-4B (115bis)
• Ambrosini S.7 (115ter)
• Fiat G.46-A (115ter)
• Fiat G.46-3A (115ter)
• Fiat G.46-4A (115ter)

Specifications (115-1)

Data from Jane's All The World's Aircraft 1938,[2] Italian Civil and Military aircraft 1930–1945,[1] and Aircraft Engines of the World 1945 [4]

General characteristics

• Type: Six-cylinder inverted air-cooled inline engine
• Bore: 118 mm (4.65 in)
• Stroke: 140 mm (5.51 in)
• Displacement: 9.187 L (560.6 cu in)
• Length: 1,642 mm (64.65 in)
• Width: 498 mm (19.6 in)
• Height: 825 mm (32.5 in)
• Dry weight: 210 kg (463.0 lb)
• Frontal Area: 0.35 m² (3.8 sq ft)

Components

• Valvetrain: Two valves per cylinder, sodium-cooled exhaust valves
• Fuel system: Two Mona-Hobson AI48D downdraught carburettors with mixture control
• Fuel type: 73 octane
• Oil system: 2.8–3.1 bar (40–45 psi), dry sump with one pressure and three scavenge pumps.
• Oil consumption: 0.01095 kg/(kW h) (0.018 lb/(hp h))
• Cooling system: Air-cooled
• Reduction gear: Direct drive
• Starter: Hand starter
• Ignition: 2 x Marelli magnetos, 2 x spark plugs per cylinder.

Performance

• Power output:
  

• Maximum power: 153 kW (205 hp) at 2,350 rpm
• Normal: 145 kW (195 hp) at 2,200 rpm
• Cruising: 100 kW (140 hp) at 1,500 rpm

• Compression ratio: 6.5:1
• Specific fuel consumption: 0.322 kg/(kW h) (0.53 lb/(hp h)) (take-off)
• Oil consumption: 0.011 kg/(kW h) (0.018 lb/(hp h))
• Power-to-weight ratio: 0.727 kW/kg (0.4425 hp/lb)

See also

Comparable engines

• de Havilland Gipsy Six
• Hirth HM 506
• Menasco Buccaneer
• Ranger 6-440
• Walter Minor 6

Related lists

• List of aircraft engines

Notes

References

• Bridgman, Leonard, ed. (1953). Jane's All The World's Aircraft 1953-54. London: Jane's.
• Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 9.
• Bridgman, Leonard, ed. (1938). Jane's All The World's Aircraft 1938. London: Sampson Low and Marston Co. Ltd. pp. 67d–68d.

На других языках

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- [en] Alfa Romeo 115

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[it] Alfa Romeo 115

L'Alfa Romeo 115 era un motore aeronautico a 6 cilindri in linea invertito prodotto dall'azienda Italiana Alfa Romeo Milano tra il 1936 ed il 1956. Derivato dal britannico de Havilland Gipsy Queen, venne prodotto in 1 600 esemplari e destinato a velivoli di piccole dimensioni, come aerei da turismo, da addestramento basico e da ricognizione, di produzione italiana del periodo pre, bellico e post-bellico.

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[ru] Alfa Romeo 115

Alfa Romeo 115 — серия итальянских рядных перевёрнутых 6-цилиндровых авиадвигателей воздушного охлаждения, разработанная компанией Alfa Romeo на основе конструкции британского de Havilland Gipsy Six и выпускавшаяся с 1936 по 1956 годы. Включала модели -1, bis, ter и Alfa Romeo 116.[1]

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