The Isotta Fraschini Gamma was an

air cooled Air-cooled engines rely on the circulation of air directly over heat dissipation fins or hot areas of the engine to cool them in order to keep the engine within operating temperatures. In all combustion engines, a great percentage of the heat ge ...

aircraft engine developed by the Italian engineering company

Isotta Fraschini Isotta Fraschini () was an Italian luxury car manufacturer, also producing trucks, as well as engines for marine and aviation use. Founded in Milan, Italy, in 1900 by Cesare Isotta and the brothers Vincenzo, Antonio, and Oreste Fraschini, in 19 ...

in the 1930s. It was an inverted V12 rated at over . Produced in small numbers for one-off aircraft, including the

Ambrosini SAI.107 The Ambrosini SAI.207 was a light fighter interceptor and developed in Italy during World War II. Developed from the pre-war SAI.7 racing aircraft it was built entirely from wood, Powered by a single 750 hp Isotta Fraschini Delta, the SA ...

and Caproni Vizzola F.5 Gamma fighter trainer prototypes, it was developed into the more powerful and more numerous

Delta Delta commonly refers to: * Delta (letter) (Δ or δ), a letter of the Greek alphabet * River delta, at a river mouth * D (NATO phonetic alphabet: "Delta") * Delta Air Lines, US * Delta variant of SARS-CoV-2 that causes COVID-19 Delta may also r ...

Design and development

The Gamma was an

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 World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...

at a rating of about . The engine formed the basis for a number of other aircraft engines produced by the company. The more powerful

was developed as a larger complement to the Gamma. While the

Beta Beta (, ; uppercase , lowercase , or cursive ; grc, βῆτα, bē̂ta or ell, βήτα, víta) is the second letter of the Greek alphabet. In the system of Greek numerals, it has a value of 2. In Modern Greek, it represents the voiced labi ...

straight-six engine The straight-six engine (also referred to as an inline-six engine; abbreviated I6 or L6) is a piston engine with six cylinders arranged in a straight line along the crankshaft. A straight-six engine has perfect primary and secondary engine bal ...

was essentially one half of the engine, the

Zeta Zeta (, ; uppercase Ζ, lowercase ζ; grc, ζῆτα, el, ζήτα, label=Demotic Greek, classical or ''zē̂ta''; ''zíta'') is the sixth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 7. It was derived fr ...

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 .

Variants

;Gamma R.C.15: at ;Gamma R.C.35: at

Applications

* Caproni Vizzola F.5 Gamma *

Savoia-Marchetti SM.86 The Savoia-Marchetti SM.85 was an Italian monoplane dive bomber and ground-attack aircraft that served in small numbers in the ''Regia Aeronautica'' at the beginning of World War II. They were soon replaced in service by the Junkers Ju 87. De ...

Specifications

References

Notes

Bibliography

* * * * * * * {{Isotta Fraschini aeroengines Air-cooled aircraft piston engines 1930s aircraft piston engines Inverted V12 aircraft engines Gamma