Alfa Romeo built/designed a range of aircraft engines based on the

Bristol Jupiter The Bristol Jupiter was a British nine-cylinder single-row piston radial engine built by the Bristol Aeroplane Company. Originally designed late in World War I and known as the Cosmos Jupiter, a lengthy series of upgrades and developments turn ...

and

Bristol Pegasus The Bristol Pegasus is a British nine-cylinder, single-row, air-cooled radial aero engine. Designed by Roy Fedden of the Bristol Aeroplane Company, it was used to power both civil and military aircraft of the 1930s and 1940s. Developed from t ...

designs, designated Alfa 125, Alfa 126, Alfa 127, Alfa 128, Alfa 129 and Alfa 131. All these essentially similar engines were mainly fitted to Italian bombers in World War II, Alfa Romeo building around 11,000 units between 1934 and 1944

Design and development

Alfa Romeo adapted the Jupiter / Pegasus (which are very closely related) to metric measurements, local materials and indigenous equipment.

Variants

Motore aeronautico - Museo scienza tecnologia Milano 12499

(The Italian engine designation system includes a suffix indicating major components or attributes. The most common were R for ''Riduttore'' - reduction gear and C for ''Compressore'' - compressor/supercharger, followed by a number indicating the rated altitude in hundreds of metres, two speed superchargers were indicated by a double figure such as 10/34). ;Alfa Romeo Jupiter: :The standard Jupiter engine built under licence from the

Bristol Aeroplane Company The Bristol Aeroplane Company, originally the British and Colonial Aeroplane Company, was both one of the first and one of the most important British aviation companies, designing and manufacturing both airframes and aircraft engines. Notable a ...

. ;Alfa 125 R.C.10: rated at ;Alfa 125 R.C.35: 1934 rated at ;Alfa 126 R.C.10: 1935 Civilian version of 126 R.C.34 rated at ;Alfa 126 R.C.32: rated at ;Alfa 126 R.C.34: 1935 rated at ;Alfa 127 R.C.50: rated at ;Alfa 127 R.C.55: 1937 rated at ;Alfa 128 R.C.18: rated at ;Alfa 128 R.C.21: 1938 rated at ;Alfa 129 R.C.32: rated at ;Alfa 131 R.C.14/50 :1943 Two speed supercharger, rated at in low gear and in high gear.

Applications

Breda Ba.64 The Breda Ba.64 was an Italian single-engine ground-attack aircraft used by the ''Regia Aeronautica'' during the 1930s. Designed by Antonio Parano and Giuseppe Panzeri, it saw limited service in two units from 1936, together with the contempora ...

(Alfa125 R.C.35) *

CANT Z.506A Airone The CANT Z.506 ''Airone'' (Italian: Heron) was a trimotor floatplane produced by CANT from 1935. It served as a transport and postal aircraft with the Italian airline "Ala Littoria". It established 10 world records in 1936 and another 10 in 19 ...

(Alfa 126 R.C.10) *

CANT Z.506B Airone The CANT Z.506 ''Airone'' ( Italian: Heron) was a trimotor floatplane produced by CANT from 1935. It served as a transport and postal aircraft with the Italian airline "Ala Littoria". It established 10 world records in 1936 and another 10 in 1 ...

(Alfa 126 R.C.34 / Alfa 127 R.C.50 / Alfa 127 R.C.55) * CANT Z.506C Airone (Alfa 126 R.C.10) *

Caproni Bergamaschi AP.1 The Caproni Bergamaschi AP.1 was an Italian monoplane attack aircraft designed by Cesare Pallavicino, coming from the Breda firm. Design and development Developed from the Ca.301, a single-seat fighter version of a similar design that was not p ...

(Alfa126 R.C.34) *

Caproni Ca.97 The Caproni Ca.97 was a civil utility aircraft produced in Italy in the late 1920s and early 1930s. As originally designed, it was a high-wing braced trimotor monoplane of conventional configuration with one engine mounted on the nose and the oth ...

(AlfaJupiter) *

DAR-10A The DAR 10 (ДАР 10) was a Bulgarian light bomber and reconnaissance aircraft. DAR-10 was designed for horizontal and dive bombing, reconnaissance, and ground attack. Design and development The DAR 10 was designed by Zvetan Lazarov in 1938 in t ...

(prototype) (Alfa126 R.C.34) *

Fiat G.12 The Fiat G.12 was an Italian transport aircraft of World War II. Design and development The G.12 was an all-metal low-wing Cantilever#Aircraft, cantilever personnel transport aircraft. It had three radial engines, one mounted on the nose and the ...

(Alfa 128 R.C.18) *

Junkers Ju 52 The Junkers Ju 52/3m (nicknamed ''Tante Ju'' ("Aunt Ju") and ''Iron Annie'') is a transport aircraft that was designed and manufactured by German aviation company Junkers. Development of the Ju 52 commenced during 1930, headed by German Aeros ...

(Alfa126 R.C.34) * Macchi M.C.94 (Alfa 126 R.C.10) *

Macchi M.C.100 The Macchi M.C.100 was an Italian commercial flying boat designed and built by Macchi. Design and development The M.C.100 was a shoulder-wing cantilever monoplane flying boat, with a family resemblance to the military twin-engine M.C.99 and ear ...

(Alfa 126 R.C.10) *

Savoia-Marchetti S.73 The Savoia-Marchetti S.73 was an Italian three-engine airliner that flew in the 1930s and early 1940s. The aircraft entered service in March 1935 with a production run of 48 aircraft. Four were exported to Belgium for SABENA, while seven others ...

(Alfa 126 R.C.10 / Alfa 126 R.C.34) *

Savoia-Marchetti S.74 The Savoia-Marchetti S.74 was a four-engine airliner developed by Savoia-Marchetti for ''Ala Littoria''. Design and development The prototype first flew on 16 November 1934. Only three were ever built. Operational history The aircraft were used ...

(Alfa126 R.C.34) *

Savoia-Marchetti SM.75 Marsupiale The Savoia-Marchetti SM.75 ''Marsupiale'' ( Italian: marsupial) was an Italian passenger and military transport aircraft of the 1930s and 1940s. It was a low-wing, trimotor monoplane of mixed metal and wood construction with a retractable tail ...

(Alfa 128 R.C.18 / Alfa 128 R.C.21) * Savoia-Marchetti S.77 (Alfa 126 R.C.10) *

Savoia-Marchetti S.M.79 Sparviero The Savoia-Marchetti SM.79 ''Sparviero'' (Italian for sparrowhawk) was a three-engined Italian medium bomber developed and manufactured by aviation company Savoia-Marchetti. It may be the best-known Italian aeroplane of the Second World War. ...

(Alfa 128 R.C.18 / Alfa 125 R.C.35 / Alfa126 R.C.34) *

Savoia-Marchetti S.M.79-II Sparviero The Savoia-Marchetti SM.79 ''Sparviero'' (Italian for sparrowhawk) was a three-engined Italian medium bomber developed and manufactured by aviation company Savoia-Marchetti. It may be the best-known Italian aeroplane of the Second World War. Th ...

(Alfa 126 R.C.34) * Savoia-Marchetti S.M.79B Sparviero (Alfa 128 R.C.18) *

Savoia-Marchetti S.M.81 Pipistrello The Savoia-Marchetti SM.81 ''Pipistrello'' ( Italian: bat) was the first three-engine bomber/transport aircraft serving in the Italian ''Regia Aeronautica''.Angelucci and Matricardi 1978, p. 188. When it appeared in 1935, it represented a real ...

(Alfa 125 R.C.35 / Alfa 126 R.C.34) *

Savoia-Marchetti S.M.82 Canguru The Savoia-Marchetti SM.82 ''Marsupiale'' was an Italian bomber and transport aircraft of World War II. It was a cantilever, mid-wing monoplane trimotor with a retractable, tailwheel undercarriage. There were 875Pini 1994, p.1. (plus one prototyp ...

(Alfa 128 R.C.18 / Alfa 128 R.C.21 / Alfa 129 R.C.32) *

Savoia-Marchetti S.M.83 The Savoia-Marchetti SM.83 was an Italian civil airliner of the 1930s. It was a civilian version of the Savoia-Marchetti SM.79 bomber. Design and development It was a monoplane, with retractable undercarriage, and a slim fuselage. Though the ca ...

(Alfa126 R.C.34) * Savoia-Marchetti S.M.84 (Alfa 128 R.C.21) * Savoia-Marchetti S.M.95 (Alfa 128 R.C.18 / Alfa 131 R.C.14/50)

Specifications (Alfa 128 R.C.21)

References

Notes Bibliography * *Archivio Storico Alfa Romeo - Volume II. Torino, November 1998 {{Alfa Romeo aeroengines 1930s aircraft piston engines Aircraft air-cooled radial piston engines

125 125 may refer to: * 125 (number), a natural number *AD 125, a year in the 2nd century AD * 125 BC, a year in the 2nd century BC *125 (dinghy) * 125 (New Jersey bus) See also * 12/5 (disambiguation) * Unbipentium An extended periodic table the ...