The Delta was a 12-cylinder inverted-V

aircraft engine An aircraft engine, often referred to as an aero engine, is the power component of an aircraft propulsion system. Most aircraft engines are either piston engines or gas turbines, although a few have been rocket powered and in recent years many ...

built by

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 ...

prior to and 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 vast majority of the world's countries—including all of the great powers—forming two opposin ...

.Gunston 1989, p.82.

Design and development

The Delta is a fairly rare example of a large air-cooled inline engine, which normally have cooling problems with the rearmost cylinders. It produced about 750 hp in common versions, although others were rated up to 900 hp. The Delta was not widely used, although it could be found on a number of production aircraft and some advanced prototypes. The engine included a number of otherwise advanced features. For instance, the valves were powered by dual overhead cams driven by power shafts at the rear of the engine. Exhaust ports were arranged to exit toward the middle of the engine, one cylinder bank being the mirror of the other, allowing the piping to be ganged below the engine nacelle.

Variants

; Delta R.C.20/55 ID-IS ; Delta R.C.21/60 ; Delta R.C.35 ; Delta R.C.35 I ; Delta R.C.35 IS ; Delta R.C.40 IS ; Delta R.C.40 ID-IS ; Delta R.C.48 ; Delta III R.C.40 ; Delta IV R.C.17/50

Applications

* Ambrosini SAI.107 * Ambrosini SAI.207 prototype * Ambrosini SAI.403 prototype * CANT Z.515 * Caproni Ca.313 *

Caproni Ca.314 The Caproni Ca.314 was an Italian Radial engine, twin-engine attack aircraft, attack/torpedo bomber aircraft, used in World War II. Derived from the similar Caproni Ca.310, Ca.310, the Ca.314 was used mainly for Ground attack aircraft, ground a ...

* Caproni Ca.331 *

Caudron C.714 The C.710 were a series of light fighter aircraft developed by Caudron-Renault for the French Air Force just prior to the start of World War II. One version, the C.714, saw limited production, and were assigned to Polish pilots flying in Franc ...

(C.760) prototype *

Henschel Hs 129 The Henschel Hs 129 was a World War II ground-attack aircraft fielded by the German ''Luftwaffe''. The aircraft saw combat in Tunisia and on the Eastern Front. A key requirement of the original specification was that the aircraft be powered b ...

prototype * Reggiane Re.2001 prototype * Savoia-Marchetti SM.86

Specifications (Delta RC35-IDS)

F11 Museum - Stockholm Skavsta - P1300085

References

Bibliography

*Gunston, Bill. ''World Encyclopedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989. *''Jane's Fighting Aircraft of World War II''. London. Studio Editions Ltd, 1989. * Wilkinson, Paul H. ''Aircraft engines of the World 1945''. New York, Paul H. Wilkinson, 1945. {{Isotta Fraschini aeroengines

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 ...