Isotta Fraschini Asso 750 Explained
The Isotta Fraschini Asso 750 was an Italian W 18 water-cooled aircraft engine of the 1930s. Produced by Isotta Fraschini the engine displaced just under and produced up to . Together with the Asso 200 and the Asso 500 the Asso 750 was part of a family of modular engines, that used common and interchangeable components to lower production costs.
Technical description
The W-18 Asso 750 had three six-cylinder in-line banks made of chrome-manganese steel, each joined by a single cast aluminum head for each bank of cylinders.
Operational history
A version with an effective power of was optimized for the Savoia-Marchetti S.55X used for the trans-Atlantic flight of Italo Balbo.
Variants
- Asso 750: Direct-drive, unsupercharged.
Asso 750 R.: Development with modified crankcase and crankshaft, fitted with a 0.658:1 reduction gear. Maximum power output .
Asso 750 R.C.:
Asso 750 R.C.35: The 750 R. fitted with a supercharger, rated altitude of .
Asso 750 M: A racing development with bore and stroke, for the Macchi M.67, re-designated Asso 1000 Ri.
Applications
Engines on display
At the Italian Air Force Museum two Isotta Fraschini Asso 750 are exhibited: A direct-drive Asso 750 and an Asso 750 R.C.35 with reduction gear and supercharger.
Further reading
- Book: Cei . Leoniero . Fiore . Amedeo . Il motorista d'aviazione . 1934 . Ulrico Hoepli . Milan . it.
- Jotti da Badia Polesine . Annuario dell'Aeronautica Italiana . 1934 . 222 . Libreria Aeronautica . Milan..
- Foreign Aero Engines at Olympia . Flight . 25 July 1929 . XXI No. 30 . 1074 . 761–778 . 8 November 2018.
- Vicenzi . Ugo . Aces High: Isotta Franchini's "Asso" Powerplant Series. The Aviation Historian . October 2021 . 37 . 42–51 . 2051-1930.
