Isotta Fraschini Gamma

The Isotta Fraschini Gamma was an air cooled aircraft engine developed by the Italian engineering company Isotta Fraschini in the 1930s. It was an inverted V12 rated at over . Produced in small numbers for one-off aircraft, including the Ambrosini SAI.107 and Caproni Vizzola F.5 Gamma fighter trainer prototypes, it was developed into the more powerful and more numerous Delta. The Gamma was an air cooled inverted V engine with 12 cylinders arranged in two banks, each cylinder of bore and stroke . Isotta Fraschini produced the Gamma in small numbers during World War II at a rating of about . The engine formed the basis for a number of other aircraft engines produced by the company. The more powerful Delta was developed as a larger complement to the Gamma. While the Beta straight-six engine was essentially one half of the engine, the Zeta mated two Gamma engines to a common crankshaft to create an X24 engine. The larger engines shared with the Gamma a problem cooling the rearmost cylinders which impeded development. In 1942, there was speculation in the UK about a powerful Italian engine called the Isotta Fraschini Gamma that produced at 2200 rpm for take-off and had a displacement of with a bore of and stroke of . Gamma R.C.15 at Gamma R.C.35 at Ambrosini SAI.107 Caproni Vizzola F.5 Gamma Savoia-Marchetti SM.