Alfa Romeo 115 Explained

The Alfa Romeo 115 is 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]

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:

See main article: Alfa Romeo 110.

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 120abbr=onNaNabbr=on developing 220abbr=onNaNabbr=on at 2,360 rpm, otherwise similar.^{[1] [2]}

Applications

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

References

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

Notes and References

1. Book: Thompson, Jonathan W. . Italian Civil and Military aircraft 1930–1945 . Aero Publishers Inc. . USA . 1963 . 0-8168-6500-0 . 63-17621. 295.
2. Book: Jane's All The World's Aircraft 1938 . Bridgman. Leonard . 1938. Sampson Low and Marston Co. Ltd.. London. 67d - 68d .
3. Web site: Fiat G.46 4B. 2007-08-28. pilotfriend.com. https://web.archive.org/web/20070927004149/http://www.pilotfriend.com/photo_albums/timeline/ww2/Fiat%20G.46%204B.htm. 27 September 2007 . live.