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The Fiat G.55 ''Centauro'' (
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: "
Centaur A centaur ( ; ; ), occasionally hippocentaur, also called Ixionidae (), is a creature from Greek mythology with the upper body of a human and the lower body and legs of a horse that was said to live in the mountains of Thessaly. In one version o ...
") is a single-engine single-seat
monoplane A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple wings. A monoplane has inherently the highest efficiency and lowest drag of any wing con ...
fighter aircraft Fighter aircraft (early on also ''pursuit aircraft'') are military aircraft designed primarily for air-to-air combat. In military conflict, the role of fighter aircraft is to establish air supremacy, air superiority of the battlespace. Domina ...
designed and produced by the Italian aircraft manufacturer
Fiat Aviazione Fiat Aviazione was an Italian aircraft manufacturer, at one time part of the Fiat S.p.A., Fiat group, focused mainly on military aviation. After World War I, Fiat consolidated several Italian small aircraft manufacturers, like Fabbrica Aeroplani I ...
. It was operated by both the ''
Regia Aeronautica The Royal Italian Air Force (''Regia Aeronautica Italiana'') (RAI) was the air force of the Kingdom of Italy. It was established as a service independent of the Regio Esercito, Royal Italian Army from 1923 until 1946. In 1946, the monarchy was ...
'' and the ''
Aeronautica Nazionale Repubblicana The National Republican Air Force (, ANR) was the air force of the Italian Social Republic, a World War II German puppet state in Italy. Description This air force was tasked with defending the industrial areas of the region, intercepting All ...
'' during the latter half of the
Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
. The G.55 was developed and produced at Fiat's
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facility. A key feature was its use of a inline engine (a
license-built Licensed production is the production under license of technology developed elsewhere. The licensee provides the licensor of a specific product with legal production rights, technical information, process technology, and any other proprietary compo ...
copy of the German
Daimler-Benz DB 605 The Daimler-Benz DB 605 is a German aircraft engine built during World War II. Developed from the DB 601, the DB 605 was used from 1942 to 1945 in the Messerschmitt Bf 109 fighter, and the Bf 110 and Me 210C heavy fighters. The DB 610, a pa ...
engine) instead of the traditionally favoured
radial engine The radial engine is a reciprocating engine, reciprocating type internal combustion engine, internal combustion engine configuration in which the cylinder (engine), cylinders "radiate" outward from a central crankcase like the spokes of a wheel. ...
. It was armed with varying combinations of 20 mm MG 151/20 cannon and 12.7 mm (.5 in) Breda-SAFAT machine guns. The resulting fighter was relatively powerful, quick, and robust. The prototype G.55 made its
maiden flight The maiden flight, also known as first flight, of an aircraft is the first occasion on which it leaves the ground under its own power. The same term is also used for the first launch of rockets. In the early days of aviation it could be dange ...
on 30 April 1942; after proving itself during competitive trials, the fighter entered quantity production and squadron service during the following year.Jackson 2003, pp. 76–77. Being only active during the latter portion of the conflict, the majority of its operational service came after the
Armistice An armistice is a formal agreement of warring parties to stop fighting. It is not necessarily the end of a war, as it may constitute only a cessation of hostilities while an attempt is made to negotiate a lasting peace. It is derived from t ...
of 8 September 1943 and thus was principally operated by the '' Repubblica Sociale Italiana''. Wartime efforts to further develop the G.55 included the ''G.56'', which was powered by the larger and more powerful German
Daimler-Benz DB 603 The Daimler-Benz DB 603 was a German aircraft engine used during World War II. It was a liquid-cooled 12-cylinder inverted V12 enlargement of the 33.9 Liter DB 601, which was in itself a development of the DB 600. Production of the DB 603 ...
engine; however, the ''G.56'' variant is not believed to have ever been produced in quantity. Following the end of the conflict, Fiat opted to reestablish production of the G.55; in addition to its domestic use, postwar export sales were made to the
Argentine Air Force The Argentine Air Force (, or simply ''FAA'') is the air force of Argentina and one of three branches of the Armed Forces of the Argentine Republic. In 2018, it had 13,837 military and 6,900 civilian personnel. FAA commander in chief is Brigadie ...
and the
Royal Egyptian Air Force The Egyptian Air Force (EAF) () is the Air force, aviation branch of the Egyptian Armed Forces that is responsible for all airborne defence missions and operates all military aircraft, including those used in support of the Egyptian Army, Egypti ...
. In this manner, examples were still being flown into the 1950s. Additionally, a dedicated trainer version, the ''G.59'', was developed, powered by imported
Rolls-Royce Merlin The Rolls-Royce Merlin is a British Coolant#Liquids, liquid-cooled V12 engine, V-12 Reciprocating engine, piston aero engine of 27-litre (1,650 cu in) Engine displacement, capacity. Rolls-Royce Limited, Rolls-Royce designed the engine an ...
engines. While Italian fighter pilots typically appreciated the ''Centauro'', by the end of the conflict fewer than 300 aircraft had been completed. By comparison, the Germans produced 35,000 Bf 109s.U.S. Strategic Bombing Survey, Aircraft Division Industry Report, Exhibit I – German Airplane Programs vs Actual Production. Despite only being available in limited numbers, the G.55 proved itself to be an excellent high altitude interceptor over Northern Italy. During 1944, the ''Centauro'' routinely clashed with British
Supermarine Spitfire The Supermarine Spitfire is a British single-seat fighter aircraft that was used by the Royal Air Force and other Allies of World War II, Allied countries before, during, and after World War II. It was the only British fighter produced conti ...
,
P-51 Mustang The North American Aviation P-51 Mustang is an American long-range, single-seat fighter aircraft, fighter and fighter-bomber used during World War II and the Korean War, among other conflicts. The Mustang was designed in 1940 by a team headed ...
,
P-47 Thunderbolt The Republic P-47 Thunderbolt is a World War II-era fighter aircraft produced by the American company Republic Aviation from 1941 through 1945. It was a successful high-altitude fighter, and it also served as the foremost American fighter-bombe ...
and
P-38 Lightning The Lockheed P-38 Lightning is an American single-seat, twin piston-engined fighter aircraft that was used during World War II. Developed for the United States Army Air Corps (USAAC) by the Lockheed Corporation, the P-38 incorporated a distinc ...
, proving to be no easy adversary.Angelucci and Matricardi 1978, p. 234. The G.55 has been claimed to be the best aircraft produced in Italy during the Second World War Ethell 1995, p. 65. (a subjective claim also frequently made for the Macchi C.205 ''Veltro'' as well as for the Reggiane Re.2005 ''Sagittario''). During 1943, after comparative tests against the Messerschmitt Bf 109G and the
Focke-Wulf Fw 190 The Focke-Wulf Fw 190, nicknamed ''Würger'' (Shrike) is a German single-seat, single-engine fighter aircraft designed by Kurt Tank at Focke-Wulf in the late 1930s and widely used during World War II. Along with its well-known counterpart, the ...
, ''
Luftwaffe The Luftwaffe () was the aerial warfare, aerial-warfare branch of the before and during World War II. German Empire, Germany's military air arms during World War I, the of the Imperial German Army, Imperial Army and the of the Imperial Ge ...
'' officials declared that the Fiat G.55 was "the best Axis fighter" available at that time.Arena 1994, p. 23.


Design and development


Background

Throughout the 1930s, the Italian military authorities chose to use only
radial engine The radial engine is a reciprocating engine, reciprocating type internal combustion engine, internal combustion engine configuration in which the cylinder (engine), cylinders "radiate" outward from a central crankcase like the spokes of a wheel. ...
s to power their aircraft. Consequently, during the second half of the 1930s, the Italian aeronautical industry had been sufficiently de-incentivised to the point of completely avoiding the development of more powerful engines based on streamlined liquid-cooled designs, which would become popular abroad.Cattaneo 1966, p. 3. However, by 1939, all the main Italian aircraft factories had begun designing a new series of
monoplane A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple wings. A monoplane has inherently the highest efficiency and lowest drag of any wing con ...
fighter aircraft, using inline engines as opposed to the
radial engine The radial engine is a reciprocating engine, reciprocating type internal combustion engine, internal combustion engine configuration in which the cylinder (engine), cylinders "radiate" outward from a central crankcase like the spokes of a wheel. ...
s that powered the first generation Italian monoplane fighters used in the early years of the Second World War (fighters such as the Fiat G.50 Freccia and the Macchi C.200 Saetta). This process saw the first-generation radial-engined fighters re-equipped with the Italian-built copy of the
Daimler-Benz DB 601 The Daimler-Benz DB 601 was a German aircraft engine that was built during World War II. It was a liquid-cooled inverted V12, and powered the Messerschmitt Bf 109, Messerschmitt Bf 110, and many others. Approximately 19,000 601s were produ ...
engine, the so-called ''Serie'' 1/2, whose most prominent representative was the Macchi C.202 Folgore. This was an aerodynamically revised Macchi C.200- also known as Macchi C.201 with a V-12 instead of a radial engine. Aircraft in this series were given alphanumeric designations ending in the number "2". This re-engining initiative had quickly proved to be beneficial, and so various Italian figures were keen to continue exploring this direction. Accordingly, during 1941, designers shifted their attention on the new, larger and more powerful ''Fiat RA.1050'', a
license-built Licensed production is the production under license of technology developed elsewhere. The licensee provides the licensor of a specific product with legal production rights, technical information, process technology, and any other proprietary compo ...
copy of Germany's
Daimler-Benz DB 605 The Daimler-Benz DB 605 is a German aircraft engine built during World War II. Developed from the DB 601, the DB 605 was used from 1942 to 1945 in the Messerschmitt Bf 109 fighter, and the Bf 110 and Me 210C heavy fighters. The DB 610, a pa ...
engine. Aircraft powered by this new engine became the "Serie 5", and all had alphanumeric designations ending in the number "5" ( Macchi C.205, Reggiane Re.2005, Fiat G.55). Fiat designer Giuseppe Gabrielli, while experimenting a new version of his
Fiat G.50 The Fiat G.50 ''Freccia'' (“Arrow”) was a World War II Italian fighter aircraft that was developed and manufactured by the aviation company Fiat. Upon entering service, the type became Italy's first single-seat, all-metal monoplane that had ...
fighter, equipped with the DB 601, started a new design that was to be powered by the DB 605.


Into flight

The first G.55
prototype A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and Software prototyping, software programming. A prototype ...
flew on 30 April 1942,Green 1961, p. 167. piloted by commander Valentino Cus, immediately showing its good performance and flight characteristics. It was armed with one 20 mm MG 151/20 cannon with 200 rounds of ammunition, installed between the cylinder banks and firing through the
propeller A propeller (often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon a working flu ...
hub. In "''Sottoserie'' 0" airframes, there were also four 12.7 mm (.5 in) Breda-SAFAT machine guns; two in the upper engine cowling, and two in the lower cowling, firing through the propeller arc, with 300 rpg. This layout soon proved to be troublesome, both for rearming and for the servicing of the lower cowling mounted machine guns. For this reason, the two lower machine guns were removed, and replaced with a 20 mm MG 151/20 in each wing, in the later production series, the ''Serie'' 1 (for a total of three cannon and two 12.7mm machine guns, although this varied; some had machine guns in the wings instead of cannon). The prototype was flown to Guidonia, where it was put into trials against the other fighters of the so-called ''Serie'' 5: Macchi C.205V ''Veltro'' and the formidable Reggiane Re.2005 ''Sagittario'', all of them using the powerful, license-built
Daimler-Benz DB 605 The Daimler-Benz DB 605 is a German aircraft engine built during World War II. Developed from the DB 601, the DB 605 was used from 1942 to 1945 in the Messerschmitt Bf 109 fighter, and the Bf 110 and Me 210C heavy fighters. The DB 610, a pa ...
engine. The trials showed that the ''Centauro'' was the second best performer overall, and it won the tender set by the ''Regia Aeronautica''. The C.205V was good at low and medium altitudes, fast and with good diving characteristics but its performance dropped considerably over 8,000 m (26,250 ft), particularly in handling. The Re.2005 was the fastest at high altitudes and best in dogfights, but suffered from vibration which turned out to be a balance problem. This was corrected, but the 2005 was still the most technically advanced, intricate, and therefore time-consuming of the three to produce, which made it unattractive at that stage of the war. The G.55 was chosen for mass production, along with the C.205. The G.55 prototype reached 620 km/h (390 mph), fully loaded, and without using WEP ( war emergency power), at 7,000 m (22,970 ft). This was a little less than expected, but it had a strong airframe and was the best aircraft regarding handling and stability at every altitude. The only negative assessment noted by G.55 pilots was pronounced left-hand yawing at takeoff due to the powerful engine torque. This was partially remedied by a slight offset positioning of the
vertical stabilizer A vertical stabilizer or tail fin is the static part of the vertical tail of an aircraft. The term is commonly applied to the assembly of both this fixed surface and one or more movable rudders hinged to it. Their role is to provide control, sta ...
to counteract the torque. By early 1943, increased Allied bombing raids over Italy had shown that there was no suitable high-altitude fighter to deal with them effectively. The Macchi C.202's performance decreased above 8,000 m (26,250 ft), the typical altitude of the
bomber A bomber is a military combat aircraft that utilizes air-to-ground weaponry to drop bombs, launch aerial torpedo, torpedoes, or deploy air-launched cruise missiles. There are two major classifications of bomber: strategic and tactical. Strateg ...
s, and its light armament of two 12.7 mm (.5 in) and two 7.7mm (.31 in) machine guns was hardly adequate to bring down
heavy bomber Heavy bombers are bomber Fixed-wing aircraft, aircraft capable of delivering the largest payload of air-to-ground weaponry (usually Aerial bomb, bombs) and longest range (aeronautics), range (takeoff to landing) of their era. Archetypal heavy ...
s. Of the ''Serie'' 5 fighters, the ''Centauro'' showed the best high-altitude performance, due to its large wing surface area. Also its powerful armament, along with the generous ammunition supply (the G.55 had 250 rounds of 20 mm ammunition in the centerline cannon as opposed to 120 rounds in the Re.2005) standardized in the production ''Serie'' I, was sufficient to bring down US heavy bombers.


Production

The ''Regia Aeronautica'' commissioned the production of 1,800 G.55s, later raising that number to 2,400.Green and Swanborough 1974, p. 238. A pre-production series of 34 examples was ordered: these aircraft were mostly based on the prototype, with minor changes to improve its flying characteristics. They had a different weapon layout, as stated above, with the two lower cowling machine guns moved into the wings. Only 19 of the 34 commissioned aircraft were built, and six of them were converted to the ''Serie'' I standard at the factory. The production version, named ''Serie'' I, had the standard armament of three 20 mm MG 151/20s and two 12.7 mm (.5 in) Breda-SAFAT machine guns, plus two underwing
hardpoint A hardpoint is an attachment location on a structural frame designed to transfer force and carry an external or internal structural load, load. The term is usually used to refer to the mounting points (more formally known as a weapon station o ...
s, allowing it to carry either two bombs (up to 160 kg/350 lb), or two
drop tank In aviation, a drop tank (external tank, wing tank or belly tank) is used to describe auxiliary fuel tanks externally carried by aircraft. A drop tank is expendable and often capable of being jettisoned. External tanks are commonplace on modern ...
s (100 L/26 US Gal). At the date of the
Armistice An armistice is a formal agreement of warring parties to stop fighting. It is not necessarily the end of a war, as it may constitute only a cessation of hostilities while an attempt is made to negotiate a lasting peace. It is derived from t ...
, 8 September 1943, 35 G.55s of all ''Series'' had been delivered, including three prototypes. Of these, only one was flown to South Italy to join the Italian Co-Belligerent Air Force (a second G.55, ''MM.91150'', was obtained by the Allies in summer 1944, when test pilot, Serafino Agostini, defected with an escaped British
POW POW is "prisoner of war", a person, whether civilian or combatant, who is held in custody by an enemy power during or immediately after an armed conflict. POW or pow may also refer to: Music * P.O.W (Bullet for My Valentine song), "P.O.W" (Bull ...
, an RAF officer, sitting on his knees. The aircraft was then taken on charge by the RAF and transferred to the
Central Fighter Establishment The Central Fighter Establishment was a Royal Air Force formation that dealt with the development of fighter aircraft tactics which was formed on 4 September 1944 as a nucleus at RAF Tangmere. It also tested new fighter aircraft and equipment, a ...
of
Tangmere Tangmere is a village, civil parish, and electoral ward in the Chichester District of West Sussex, England. Located three miles (5 km) north east of Chichester, it is twinned with Hermanville-sur-Mer in Lower Normandy, France. The pari ...
,
Great Britain Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...
, on 17 March 1945, with the identification number VF204 applied, was put in the depot at Ford; its final fate is unrecorded.Sgarlato 2009, p. 44.Green and Swanborough 1974, p. 239.) From that date on, the ''Centauro'' served with the ''
Aeronautica Nazionale Repubblicana The National Republican Air Force (, ANR) was the air force of the Italian Social Republic, a World War II German puppet state in Italy. Description This air force was tasked with defending the industrial areas of the region, intercepting All ...
'' (ANR), the air force of the new fascist state created in North Italy by
Mussolini Benito Amilcare Andrea Mussolini (29 July 188328 April 1945) was an Italian politician and journalist who, upon assuming office as Prime Minister, became the dictator of Fascist Italy from the March on Rome in 1922 until his overthrow in 194 ...
, with the assistance of the Germans. It still not exactly known how many "Centauros" were eventually requisitioned by the ''Luftwaffe'' or those acquired by ANR. About 18 aircraft were expropriated by the ANR while 12–20 (possibly as many as 42, according to some official reports) were requisitioned by the Germans. The Fiat factory, in
Turin Turin ( , ; ; , then ) is a city and an important business and cultural centre in northern Italy. It is the capital city of Piedmont and of the Metropolitan City of Turin, and was the first Italian capital from 1861 to 1865. The city is main ...
under German control, continued production for about six months. On 25 April 1944, Fiat factories were heavily bombed: 15 G.55s were destroyed, as well as some
trimotor A trimotor is a propeller-driven aircraft powered by three internal combustion engines, characteristically one on the nose and one on each wing. A compromise between complexity and safety, such a configuration was typically a result of the limit ...
Fiat G.12 transports, BR.20 bombers, and CR.42LW biplane fighters ordered by the Luftwaffe. 164 "Centauros" had been completed, 97 of them being produced after the Armistice and delivered to the ANR. Following the advice of Rüstungs und Kriegsproduktion Stab (RuK), the German Control Commission, production was dispersed in small cities of Monferrato and production of parts were assigned to CANSA of
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and AVIA in
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. The parts were then assembled in
Turin Turin ( , ; ; , then ) is a city and an important business and cultural centre in northern Italy. It is the capital city of Piedmont and of the Metropolitan City of Turin, and was the first Italian capital from 1861 to 1865. The city is main ...
where the aircraft were to be flown by test pilots Valentino Cus, Rolandi, Agostini and Catella.Sgarlato 2009, p. 44-46. Production slowed markedly, and was stopped by the German authorities in September 1944.Green and Swanborough 1974, p. 261. A total of 148 G.55s were delivered to the ANR and, when the factory was captured, 37 more examples were ready, while 73 were still on the production line, in various degrees of completion.


Operational history

The first Centauro to see operational use was the third prototype. On 21 March 1943, it was assigned to 20° ''Gruppo'' ( squadron), 51° ''Stormo'' (
wing A wing is a type of fin that produces both Lift (force), lift and drag while moving through air. Wings are defined by two shape characteristics, an airfoil section and a planform (aeronautics), planform. Wing efficiency is expressed as lift-to-d ...
) CT, based at Roma-Ciampino, for operational evaluation. In May, the unit transferred to Capoterra, near
Cagliari Cagliari (, , ; ; ; Latin: ''Caralis'') is an Comune, Italian municipality and the capital and largest city of the island of Sardinia, an Regions of Italy#Autonomous regions with special statute, autonomous region of Italy. It has about 146,62 ...
having its baptism of fire on 5 June 1943 against Allied aircraft attacking
Sardinia Sardinia ( ; ; ) is the Mediterranean islands#By area, second-largest island in the Mediterranean Sea, after Sicily, and one of the Regions of Italy, twenty regions of Italy. It is located west of the Italian Peninsula, north of Tunisia an ...
. The two first pre-production series flew, respectively, on 10 April and in May 1943. In early June they were assigned to ''353a Squadriglia ''(
flight Flight or flying is the motion (physics), motion of an Physical object, object through an atmosphere, or through the vacuum of Outer space, space, without contacting any planetary surface. This can be achieved by generating aerodynamic lift ass ...
) ''CT'' based in
Foligno Foligno (; Central Italian, Southern Umbrian: ''Fuligno'') is an ancient town of Italy in the province of Perugia in east central Umbria, on the Topino river where it leaves the Apennine Mountains, Apennines and enters the wide plain of the Clit ...
,
Umbria Umbria ( ; ) is a Regions of Italy, region of central Italy. It includes Lake Trasimeno and Cascata delle Marmore, Marmore Falls, and is crossed by the Tiber. It is the only landlocked region on the Italian Peninsula, Apennine Peninsula. The re ...
, were, until August, were transferred nine more aircraft.Sgarlato 2009, pp. 42–43. Pilots were delighted when they began to receive the new fighter in summer 1943.Gunston 1988, p. 253. In June, the first Serie I were assigned to ''Gruppo Complementare'' of 51° ''Stormo'' in Foligno, near
Perugia Perugia ( , ; ; ) is the capital city of Umbria in central Italy, crossed by the River Tiber. The city is located about north of Rome and southeast of Florence. It covers a high hilltop and part of the valleys around the area. It has 162,467 ...
, but in July the 11 G.55 of ''Gruppo Complementare'' were transferred to 353a ''Squadriglia'', that already had in charge the "pre-series" machines, to operate from Roma-Ciampino Sud airfield. The 353a ''Squadriglia'', commanded by ''Capitano'' Egeo Pittoni, flew many missions against the American bomber formations, but the flights were stopped when
Rome Rome (Italian language, Italian and , ) is the capital city and most populated (municipality) of Italy. It is also the administrative centre of the Lazio Regions of Italy, region and of the Metropolitan City of Rome. A special named with 2, ...
was declared "Città aperta" (
open city In war, an open city is a settlement which has announced it has abandoned all defensive efforts, generally in the event of the imminent capture of the city to avoid destruction. Once a city has declared itself open, the opposing military will ...
). On 27 August, the ''Squadriglie'' 351a and 352a left Sardinia and arrived in Foligno to be re-equipped with G.55. But at the date of the 8 September the G.55 had not been delivered yet. During the first week of September, 12 ''Centauros'' had been assigned to 372a ''Squadriglia'' of 153° ''Gruppo'' in Torino-Mirafiori.Sgarlato 2009, pp. 42–44. On 8 September 1943, the date of Armistice, the ''Regia Aeronautica'' had received 35 G.55s. Only one of them flew to southern Italy, accepting the invitation of ''Maresciallo d'Italia''
Pietro Badoglio Pietro Badoglio, 1st Duke of Addis Abeba, 1st Marquess of Sabotino ( , ; 28 September 1871 – 1 November 1956), was an Italian general during both World Wars and the first viceroy of Italian East Africa. With the fall of the Fascist regim ...
to surrender to Allied forces.


Service with the Aeronautica Nazionale Repubblicana

There is no exact information about the G.55's captured by the ''Luftwaffe'' or acquired by ''
Aeronautica Nazionale Repubblicana The National Republican Air Force (, ANR) was the air force of the Italian Social Republic, a World War II German puppet state in Italy. Description This air force was tasked with defending the industrial areas of the region, intercepting All ...
''. About 18 G.55s were acquired by ANR while 12–20, or even 42, according to some reports, were requisitioned by the ''Luftwaffe''. The ''Centauro'' entered in service with the ANR; a decision was made to produce 500 G.55s, of which 300 were G.55/I and 200 G.55/II ''Serie'' II, armed with five 20 mm MG 151/20s and no machine guns (one in the centerline, two in the upper cowling, two in the wings). Only 148 were delivered to the ANR units that, as the number of available G.55s dwindled, were progressively re-equipped with the Bf 109G, of various sub-versions, even though Italian pilots preferred the G.55, with cancellation of production being extremely unpopular. The ANR had two ''Gruppi Caccia terrestre'' (fighter squadrons), the first was initially equipped with the Macchi C.205, from November 1943 to May 1944, then, re-equipped with the G.55/I in June 1944 until it switched to the Bf 109G starting from November 1944. The 2nd ''Gruppo'' was the main unit equipped with the G.55, of which it had 70 examples from December 1943 – August 1944, before being progressively re-equipped with the Bf 109G. The first unit in ANR to be equipped with G.55 was the ', in November 1943, operating from
Piemonte Piedmont ( ; ; ) is one of the 20 regions of Italy, located in the Northwest of the country. It borders the Liguria region to the south, the Lombardy and Emilia-Romagna regions to the east, and the Aosta Valley region to the northwest. Pied ...
until 29 March 1944, when it was absorbed by the 1st ''Gruppo'' and transferred in Veneto. The 2nd ''Gruppo'' was formed at Bresso. It was initially commanded by Lt Col Antonio Vizzoto, and later by Lt Col Aldo Alessandrini.Neulen 2000, p. 81. It had three ''Squadriglie'' (the 4th, ''Gigi Tre Osei'', the 5th, ''Diavoli Rossi'', and the 6th, ''Gamba di Ferro''). The unit operated near
Milan Milan ( , , ; ) is a city in northern Italy, regional capital of Lombardy, the largest city in Italy by urban area and the List of cities in Italy, second-most-populous city proper in Italy after Rome. The city proper has a population of nea ...
and
Varese Varese ( , ; or ; ; ; archaic ) is a city and ''comune'' in north-western Lombardy, northern Italy, north-west of Milan. The population of Varese in 2018 was 80,559. It is the capital of the Province of Varese. The hinterland or exurban part ...
until April 1944, then it was transferred near
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and
Pavia Pavia ( , ; ; ; ; ) is a town and comune of south-western Lombardy, in Northern Italy, south of Milan on the lower Ticino (river), Ticino near its confluence with the Po (river), Po. It has a population of c. 73,086. The city was a major polit ...
, then again near the
Lake Garda Lake Garda (, , or , ; ; ) is the largest lake in Italy. It is a popular holiday location in northern Italy, between Brescia and Milan to the west, and Verona and Venice to the east. The lake cuts into the edge of the Eastern Alps, Italian Alp ...
(
Brescia Brescia (, ; ; or ; ) is a city and (municipality) in the region of Lombardy, in Italy. It is situated at the foot of the Alps, a few kilometers from the lakes Lake Garda, Garda and Lake Iseo, Iseo. With a population of 199,949, it is the se ...
and
Verona Verona ( ; ; or ) is a city on the Adige, River Adige in Veneto, Italy, with 255,131 inhabitants. It is one of the seven provincial capitals of the region, and is the largest city Comune, municipality in the region and in Northeast Italy, nor ...
). At the end of May, the 2° ''Gruppo'' gave its G.55s to 1° ''Gruppo'' and re-equipped with 46 ex I./JG 53 and II./JG 77 Bf 109G-6/R6Neulen 2000, p. 81. With the ANR, the G.55s gave a good account of themselves against Allied fighters, including the Spitfire and Mustang.Jackson 2003, p. 77.Cleaver 2024, p. 86.


German interest

In December 1942, a technical commission of the ''Regia Aeronautica'' was invited by the ''Luftwaffe'' to test some German aircraft in Rechlin. The visit was part of a joint plan for the standardization of
Axis An axis (: axes) may refer to: Mathematics *A specific line (often a directed line) that plays an important role in some contexts. In particular: ** Coordinate axis of a coordinate system *** ''x''-axis, ''y''-axis, ''z''-axis, common names ...
aircraft production.Vajda and Dancey 1998, pp. 252-253. In the same time, some ''Luftwaffe'' officers visited Guidonia, where they were particularly interested in the performance promised by the ''Serie'' 5 fighters. On 9 December, these impressions were discussed in a ''Luftwaffe'' staff meeting and raised the interest of
Hermann Göring Hermann Wilhelm Göring (or Goering; ; 12 January 1893 – 15 October 1946) was a German Nazism, Nazi politician, aviator, military leader, and convicted war criminal. He was one of the most powerful figures in the Nazi Party, which gov ...
himself. In February 1943, a German test commission was sent to Italy to evaluate the new Italian fighters. The commission was led by ''Oberst'' Petersen; it was formed by ''Luftwaffe'' officers, pilots and by technical personnel, among them ''Flugbaumeister'' Malz. The Germans also brought with them several aircraft, including a Fw 190 A-5 and a Bf 109 G-4 for direct comparison tests in simulated dogfights. The tests began on 20 February 1943. The German commission very impressed by the Italian aircraft, the G.55 in particular. In general, all the ''Serie'' 5 fighters were very good at low altitudes, but the G.55 was also competitive with its German opponents in term of speed and climb rate at high altitudes, while still maintaining superior handling characteristics. The definitive evaluation by the German commission was "excellent" for the G.55, "excellent" for the Re.2005 although very complicated to produce, and merely "average" for the C.205. ''Oberst'' Petersen defined the G.55 "the best fighter in the
Axis An axis (: axes) may refer to: Mathematics *A specific line (often a directed line) that plays an important role in some contexts. In particular: ** Coordinate axis of a coordinate system *** ''x''-axis, ''y''-axis, ''z''-axis, common names ...
" and immediately telegraphed his impressions to Göring. After listening to the recommendations of Petersen, Milch and Galland, a meeting held by Göring on 22 February 1943 voted to produce the G.55 in Germany. German interest, apart from the good test results, derived also from the development possibilities they were able to see both in the G.55 and the Re.2005. Particularly, the G.55 was bigger and heavier and was considered a very good candidate for the new, significantly larger and more powerful DB 603 engine, which was considered too large to fit in the Bf 109's airframe. Other visits were organized in Germany during March and May 1943 in Rechlin and Berlin. The G.55 was again tested at Rechlin at the presence of Milch. Gabrielli and other FIAT personnel were invited to visit German factories and to discuss the evolution of the aircraft. The specifications of the German G55/II included the DB 603 engine, five 20 mm guns and a pressurized cockpit. The suggestion of weapons in the wings, limited to one 20 mm gun for each wing, originated the final configuration of the ''Serie'' I, while the DB 603 engine was successfully installed in what became the G.56 prototype. As a concrete expression of the German interest in the G.55, the ''Luftwaffe'' acquired three complete G.55/0 airframes (MM 91064-65-66) for evaluations and experiments providing three DB 603 engines and original machinery for the setup of other production line of the Italian copy of DB 605. Two of the ''Luftwaffe'' G.55's remained in Turin, at the ''Aeritalia'' plants, where they were used by German and Italian engineers to study the planned modifications and the possible optimizations to the production process. Later these two were converted to Serie I and delivered to the ANR. The third one was transferred to Rechlin for tests and experiments in Germany. The DB 603 engines were used to build the G.56 prototypes. The interest in the G.55 program was still high after the Armistice. In October 1943,
Kurt Tank Kurt Waldemar Tank (24 February 1898 – 5 June 1983) was a German aeronautical engineer and test pilot who led the design department at Focke-Wulf from 1931 to 1945. He was responsible for the creation of several important Luftwaffe aircraft of ...
, who previously personally tested a G.55 in Rechlin, and who had had nothing but praise for the aircraft, was in Turin to discuss G.55 production. However, events in the war (including intention efforts by the Allies to bomb Italian aircraft factories) and the not yet optimized production process were the reasons for which the G.55 program was eventually abandoned by the ''Luftwaffe''. Early production of G.55 required about 15,000
man-hour A man-hour or human-hour is the amount of work performed by the average worker in one hour. It is used for estimation of the total amount of uninterrupted labor required to perform a task. For example, researching and writing a college paper ...
s; while there were estimates to reduce the effort to about 9,000 man-hours, the well-practiced German factories were able to assemble a Bf 109 in only 5,000 man-hours. The DB 603 were instead to be used in Tank's own Focke-Wulf Ta 152C.


Torpedo fighter

The ''Regia Aeronautica'' frequently used
torpedo bomber A torpedo bomber is a military aircraft designed primarily to attack ships with aerial torpedoes. Torpedo bombers came into existence just before the World War I, First World War almost as soon as aircraft were built that were capable of carryin ...
s to air-launch torpedoes, such as the
trimotor A trimotor is a propeller-driven aircraft powered by three internal combustion engines, characteristically one on the nose and one on each wing. A compromise between complexity and safety, such a configuration was typically a result of the limit ...
SIAI-Marchetti SM.79 ''Sparviero''
medium bomber A medium bomber is a military bomber Fixed-wing aircraft, aircraft designed to operate with medium-sized Aerial bomb, bombloads over medium Range (aeronautics), range distances; the name serves to distinguish this type from larger heavy bombe ...
. These had some success in the early war years, inflicting considerable losses on Allied shipping in the Mediterranean. By late 1942 the ageing ''Sparviero'' was facing continually improving Allied fighters and anti aircraft defences, leading to the Italian general staff exploring the idea of using well-powered, single-engined
heavy fighter A heavy fighter is an historic category of fighter aircraft produced in the 1930s and 1940s, designed to carry heavier weapons or operate at longer ranges than light fighter aircraft. To achieve performance, most heavy fighters were twin-engine ...
s to deliver torpedoes – a concept known later as the " torpedo fighter". Such aircraft, based near the Italian coast, could potentially have an operational range of 300–400 km (190–250 mi), would be capable of carrying a 680 kg (1,500 lb) torpedo (a shorter and more compact version of a weapon carried by the SM.79) at relatively high speed, and would also be better able to evade enemy fighters and/or combat them on equal terms. While some consideration was given to adapting the G.55, Fiat began designing the G.57, a separate design powered by the 930 kW (1,250 hp) Fiat A.83 R.C.24/52 radial engine that was more capable of carrying a torpedo. Later, after the G.57 project was dropped, and given the ANR's continuing need for an aircraft that could replace the SM.79, the ANR engineers undertook the task of converting the ''Centauro'' for the torpedo attack role. A production G.55 (military serial number ''MM. 91086'') was modified to carry a 920 kg (2,030 lb), 5.46 m (17.91 ft) long torpedo. The engine coolant
radiator A radiator is a heat exchanger used to transfer thermal energy from one medium to another for the purpose of cooling and heating. The majority of radiators are constructed to function in cars, buildings, and electronics. A radiator is always a ...
, normally a single unit positioned on the belly of the fuselage under the cockpit area, was divided into two units mounted under the wing roots (similar to the layout used on the Bf 109), gaining a 90 cm (35 in) space where two racks were mounted to carry the torpedo. The tailwheel strut was lengthened and equipped with a strengthened shock absorber to keep the tailfins of the torpedo from striking the ground, and a drag-reducing cowling was added in front of the tailwheel to minimize drag from the lengthened strut. The G.55/S shared the same gun layout as the G.55/I, with the three MG 151/20s and the two Breda-SAFAT machine guns. The aircraft, designated G.55/S, first flew in August 1944 and was successfully tested in January 1945, piloted by Adriano Mantelli. Despite the cumbersome external load, performance was good and the handling acceptable. The ANR ordered a pre-series of 10 examples and a production series of 100 aircraft, but the conclusion of the war put an end to the project. The G.55/S prototype survived the war and, after being converted back to the ''Serie'' I standard, it became the first G.55 to be delivered to the newly formed '' Aeronautica Militare Italiana'' (AMI).


Fiat G.56

The Fiat G.56 was essentially a Fiat G.55 with a larger German
Daimler-Benz DB 603 The Daimler-Benz DB 603 was a German aircraft engine used during World War II. It was a liquid-cooled 12-cylinder inverted V12 enlargement of the 33.9 Liter DB 601, which was in itself a development of the DB 600. Production of the DB 603 ...
engine. A pair of prototypes were built and flight testing commenced in March 1944. On 30 March of that year, Commander Valentino Cus reached speeds of 690/700 km/h (430/440 mph). The aircraft's official maximum speed was 685 km/h (426 mph). It was armed with three 20 mm MG 151/20 cannon, one firing through the propeller hub while the other two were installed in the wings.Green and Swanborough 1994, p. 210. It reportedly possessed excellent performance and proved to be superior to both the Bf 109K and Bf 109G and Fw 190A, being capable of outmaneuvering all types during testing.Ethell 1995, p. 65. Production of the G.56, however, was not allowed by the German authorities.Vajda and Dancey 1998, p. 253.


Postwar service

During 1946, Fiat restarted production of the G.55, making use of the large stock of partly complete airframes and components remaining in its factories. It was available in two versions, the G.55A, a single-seat fighter/advanced trainer, and the G.55B, a two-seat advanced trainer, whose prototypes flew on 5 September 1946 and 12 February 1946 respectively. The AMI acquired 19 G.55As and 10 G.55Bs, while the
Argentine Air Force The Argentine Air Force (, or simply ''FAA'') is the air force of Argentina and one of three branches of the Armed Forces of the Argentine Republic. In 2018, it had 13,837 military and 6,900 civilian personnel. FAA commander in chief is Brigadie ...
purchased 30 G.55As, and 15 G.55Bs. In September 1951, units of the
Argentine Navy The Argentine Navy (ARA; ). This forms the basis for the navy's ship prefix "ARA". is the navy of Argentina. It is one of the three branches of the Armed Forces of the Argentine Republic, together with the Argentine Army, Army and the Argentine ...
and
Army An army, ground force or land force is an armed force that fights primarily on land. In the broadest sense, it is the land-based military branch, service branch or armed service of a nation or country. It may also include aviation assets by ...
attempted a
military coup A military, also known collectively as armed forces, is a heavily armed, highly organized force primarily intended for warfare. Militaries are typically authorized and maintained by a sovereign state, with their members identifiable by a d ...
against the government of
Juan Perón Juan Domingo Perón (, , ; 8 October 1895 – 1 July 1974) was an Argentine military officer and Statesman (politician), statesman who served as the History of Argentina (1946-1955), 29th president of Argentina from 1946 to Revolución Libertad ...
. The G.55s and the sole Argentine G.59 of ''Grupo 2 de Caza'' of the Argentine Air Force attempted to defect to the rebel forces, flying to the
Punta Indio Naval Air Base Punta Indio Naval Air Base (, ) is a military airport operated by the Argentine Naval Aviation, located in the countryside northeast of Verónica, Buenos Aires, Verónica, a town in the Buenos Aires Province of Argentina. The Punta Indio VOR-D ...
. The pilots were arrested on arrival and the aircraft immobilised, however, and took no further part in the revolt, which was defeated by Loyalist forces.Hagedorn 2006, pp. 131–132.


G.59

The production of these orders for G.55s for Italy and Argentina caused the available stocks of the Italian licence-built version of the DB 605 engine to run short. As there was still a demand for the aircraft, it was decided to convert the type to use the more readily available
Rolls-Royce Merlin The Rolls-Royce Merlin is a British Coolant#Liquids, liquid-cooled V12 engine, V-12 Reciprocating engine, piston aero engine of 27-litre (1,650 cu in) Engine displacement, capacity. Rolls-Royce Limited, Rolls-Royce designed the engine an ...
engine, with the first conversion flying in early 1948.Green and Swanborough 1994, p. 211. The conversion was successful, and the AMI decided to convert its G.55s to Merlin power, these re-entering service at the
Lecce Lecce (; ) is a city in southern Italy and capital of the province of Lecce. It is on the Salentine Peninsula, at the heel of the Italian Peninsula, and is over two thousand years old. Because of its rich Baroque architecture, Lecce is n ...
flying school in 1950 as the G.59-1A and G.59-1B (single- and two-seat versions).Green and Swanborough 1974, p. 262. The AMI continued operating the G.59 until 1964.Genchi 2024, p. 144.
Syria Syria, officially the Syrian Arab Republic, is a country in West Asia located in the Eastern Mediterranean and the Levant. It borders the Mediterranean Sea to the west, Turkey to Syria–Turkey border, the north, Iraq to Iraq–Syria border, t ...
placed an order for 30 similar aircraft, which by this time, were completely from new production as the stocks of G.55 components had been exhausted. Of these, 26 were single-seaters (designated G.59-2A) and the remaining 4 two-seaters (G.59-2B). A single G.59-2A was acquired by Argentina for evaluation, but no further orders followed from the South American republic. The final versions were the G.59-4A single-seater and G.59-4B two-seater, which were fitted with bubble canopies for improved visibility. 20 G.59-4As and ten G.59-4Bs were produced by Italy.


Variants

;G.55: 3 prototypes. ;G.55/0: 16 pre-production aircraft. ;G.55/1: Initial production aircraft. ;G.55/2: Bomber
interceptor Interceptor may refer to: Arts and entertainment Film and television * ''The Interceptor'', a British drama series on BBC One * Interceptor (game show), ''Interceptor'' (game show), a British television game show that ran during 1989 * Interc ...
version. ;G.55/S: Torpedo attack aircraft variant. S for silurante meaning torpedo. ;G.55/A,B: Single-seat/twin-seat trainer versions, developed after the conflict. ;G.56: 2 prototypes with Daimler-Benz DB 603A engines. ;G.57: Version planned with A Fiat A.83 R.C.24/52 radial engine. ;G.59-1A:
Rolls-Royce Merlin The Rolls-Royce Merlin is a British Coolant#Liquids, liquid-cooled V12 engine, V-12 Reciprocating engine, piston aero engine of 27-litre (1,650 cu in) Engine displacement, capacity. Rolls-Royce Limited, Rolls-Royce designed the engine an ...
powered single-seat advanced trainers converted from G.55s ;G.59-1B :Rolls-Royce Merlin powered two-seat trainers converted from G.55s ;G.59-2A: 26, new production, Rolls-Royce Merlin powered single-seaters for
Syria Syria, officially the Syrian Arab Republic, is a country in West Asia located in the Eastern Mediterranean and the Levant. It borders the Mediterranean Sea to the west, Turkey to Syria–Turkey border, the north, Iraq to Iraq–Syria border, t ...
;G.59-2B: 4, new production, Rolls-Royce Merlin powered two-seat trainers for
Syria Syria, officially the Syrian Arab Republic, is a country in West Asia located in the Eastern Mediterranean and the Levant. It borders the Mediterranean Sea to the west, Turkey to Syria–Turkey border, the north, Iraq to Iraq–Syria border, t ...
;G.59-4A: 20, new production, Rolls-Royce Merlin powered single-seaters for the Aeronautica Militare Italiana, fitted with bubble canopies. ;G.59-4B: 10, new production, Rolls-Royce Merlin powered two-seaters for the Aeronautica Militare Italiana, fitted with bubble canopies.


Operators

; *
Argentine Air Force The Argentine Air Force (, or simply ''FAA'') is the air force of Argentina and one of three branches of the Armed Forces of the Argentine Republic. In 2018, it had 13,837 military and 6,900 civilian personnel. FAA commander in chief is Brigadie ...
; *
Royal Egyptian Air Force The Egyptian Air Force (EAF) () is the Air force, aviation branch of the Egyptian Armed Forces that is responsible for all airborne defence missions and operates all military aircraft, including those used in support of the Egyptian Army, Egypti ...
; * ''
Regia Aeronautica The Royal Italian Air Force (''Regia Aeronautica Italiana'') (RAI) was the air force of the Kingdom of Italy. It was established as a service independent of the Regio Esercito, Royal Italian Army from 1923 until 1946. In 1946, the monarchy was ...
'' ; * ''
Aeronautica Nazionale Repubblicana The National Republican Air Force (, ANR) was the air force of the Italian Social Republic, a World War II German puppet state in Italy. Description This air force was tasked with defending the industrial areas of the region, intercepting All ...
'' ; *
Italian Air Force The Italian Air Force (; AM, ) is the air force of the Italy, Italian Republic. The Italian Air Force was founded as an independent service arm on 28 March 1923 by Victor Emmanuel III of Italy, King Victor Emmanuel III as the ("Royal Air Force ...
operated 74 Fiat G.59 retired in 1965 ; *
Syrian Air Force The Syrian Air Force () is the air force branch of the Syrian Armed Forces. It was established in 1948, and first saw action in the 1948 Arab–Israeli War. Under Ba'athist Syria until December 8, 2024, it was known as the Syrian Arab Air Forc ...


Surviving aircraft

No G.55s survive, but a G.59-2A, MM53265, was converted to resemble one and is on display at the Italian Air Force Museum in Vigna di Valle, Lazio. Several other G.59s have survived in their postwar configuration, including: * MM53136 – G.59-2B on static display at the Lonate Pozzolo War Memorial in Varese, Lombardy. It is displayed in wrecked condition. * MM53276 – G.59-4B on static display at the Italian Air Force Museum in Vigna di Valle, Lazio. * MM53278 – G.59-4B airworthy with private owner in Hartheim am Rhein, Baden-Württemberg. * MM53525 – G.59-A in storage at the Italian Air Force Museum in Vigna di Valle, Lazio. * MM53526 – G.59-4B in storage at the Italian Air Force Museum in Vigna di Valle, Lazio. * MM53530 – G.59-4B on static display at the Museum of Engines and Mechanisms in
Palermo Palermo ( ; ; , locally also or ) is a city in southern Italy, the capital (political), capital of both the autonomous area, autonomous region of Sicily and the Metropolitan City of Palermo, the city's surrounding metropolitan province. The ...
. * MM53774 – G.59-4B airworthy with Nucleo Aereo Acrobatico Parmense in Parma, Emilia-Romagna. * MM53778 – G.59-4B under restoration for the
Military Aviation Museum The Military Aviation Museum is located in Virginia Beach, Virginia, and houses one of the world's largest private collections of warbirds in flying condition. It includes examples from Germany, France, Italy, Russia, the United Kingdom, and the ...
in
Virginia Beach, Virginia Virginia Beach (colloquially VB) is the most populous city in the U.S. commonwealth of Virginia. The city is located on the Atlantic Ocean at the mouth of the Chesapeake Bay in southeastern Virginia. It is the sixth-most populous city in the ...
.


Specifications (G.55/I)

G.56 : * 3 × MG 151/20s, one engine-mounted (300 rounds) and two wing-mounted (250 rpg)


See also


References


Citations


Bibliography

* * * * * * * * * * * * * * * * *


Further reading

* * * * * * * * * * *


External links


Virtual G55 project

Fiat G.55 Centauro
{{Portal bar, Italy, Companies, Aviation G.055 1940s Italian fighter aircraft Single-engined tractor aircraft Low-wing aircraft Aircraft first flown in 1942 Aircraft with retractable conventional landing gear Single-engined piston aircraft