Isotta Fraschini Asso Caccia

Isotta Fraschini

Industry	Aerospace, Aircraft engines
Headquarters	Italy
Products	Aero engines

The Isotta Fraschini Asso Caccia, also identified as the Isotta Fraschini Asso-450 Caccia, was an air-cooled, supercharged V12 piston aero engine manufactured during the late 1920s and early 1930s by the Italian firm Isotta Fraschini.

Design

Featuring a V-type cylinder arrangement, the Asso Caccia utilized carbon steel cylinders, each individually finned for cooling and mounted separately. Each cylinder was capped by a single head. Positioned above these were two lightweight alloy casings—one per bank of cylinders—that served to link the cylinder heads with the intake manifolds and enclosed the tappets and valve train components beneath removable covers.

The crankshaft, forged from specialized steel, rested on eight bearings. Notably, at the rear end between the final two bearings, a combination of a double bearing and a thrust ball bearing was installed to withstand propeller loads in both tractor and pusher configurations.

Applications

• Fiat CR.1
• Fiat CR.20