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12-499: The Yakovlev design bureau began work on an advanced trainer based on the Yak-3 fighter in mid-1944, although the trainer was of low priority owing to the ongoing Second World War . The first prototype of the new trainer, designated Yak-UTI or Yak-3UTI flew in late 1945. It was based on the radial -powered Yak-3U, but with the new Shvetsov ASh-21 seven-cylinder radial replacing the ASh-82 of

24-668: A bureau's activity is R&D or " research and development ." For security, each bureau was only officially identified by a number, but were often semi-officially referenced by the name of its lead designer. For example, OKB-51 was led by Pavel Sukhoi , and it eventually became known as the OKB of Sukhoi . Successful and famous bureaus often retained these names after the death or replacement of their founding designers. These relatively small state-run organisations were not intended for mass production of aircraft, rockets, or other vehicles or equipment which they designed. However, they usually had

36-513: A modified engine installation with the engine mounted on shock absorbing mounts. This aircraft passed state testing in October 1946, with production beginning at factories in Saratov and Leningrad in 1947. Production Yak-11s were heavier than the prototypes, with later batches fitted with non-retractable tailwheels and revised propellers. A 7.62 mm ShKAS machine gun was sometimes fitted instead of

48-496: A new company named United Aircraft Building Corporation in February 2006. The firm designed the Pchela ( Russian : Пчела , "bee") drone reconnaissance aircraft (first flown in 1990), but is perhaps best known for its highly successful line of World War II-era piston-engined fighter-aircraft. In August 2023, Irkut Corporation rebranded itself as Yakovlev. The Sukhoi Superjet 100

60-481: Is a Russian aircraft designer and manufacturer (design office prefix Yak ). Its head office is in Aeroport District , Northern Administrative Okrug , Moscow . It is a subsidiary of Yakovlev Corporation . The bureau formed in 1934 under aircraft designer Alexander Sergeyevich Yakovlev as OKB -115 (the design bureau has its own production base at the facility No.115), but dates its birth from 12 May 1927,

72-764: The UBS, while some were fitted with rear-view periscopes above the windscreen. Soviet production totalled 3,859 aircraft between 1947 and 1955, with a further 707 licence-built by Let in Czechoslovakia as the C-11. In 1951, Yakovlev revised the design of the Yak-11, adding a retractable tricycle landing gear , with two variants proposed, the Yak-11U basic trainer and Yak-11T proficiency trainer, which carried equipment similar to contemporary jet fighters. The new aircraft had reduced fuel capacity and

84-561: The Yak-11 to intercept American reconnaissance balloons . Due to its Yak-3 lineage, the Yak-11 has recently seen widespread popularity among warbird enthusiasts. Highly modified versions of the Yak-11 are often seen at air races . About 120 Yak-11s remain airworthy. General characteristics Performance Armament Related development Aircraft of comparable role, configuration, and era Yakovlev The JSC A.S. Yakovlev Design Bureau ( Russian : ОАО Опытно-конструкторское бюро им. А.С. Яковлева )

96-458: The Yak-3U. It used the same all-metal wings as the Yak-3U, with a fuselage of mixed metal and wood construction. The pilot and observer sat in tandem under a long canopy with separate sliding hoods. A single synchronised UBS 12.7 mm machine gun and wing racks for two 100 kg (220 lb) bombs comprised the aircraft's armament. An improved prototype flew in 1946, with revised cockpits and

108-637: The aircraft extensively during their intervention in the Yemeni Civil war. Egyptian aircraft were modified with Sakr 78mm unguided rockets and two .303in guns in the wings. and were used in the ground attack role. North Korean Yak-11s were used in combat in the Korean War , with one Yak-11 being the first North Korean aircraft shot down by US forces when it was destroyed by a North American F-82 Twin Mustang over Kimpo Airfield on 27 June 1950. East Germany used

120-576: The day of maiden flight of the AIR-1 aircraft developed within the Department of Light Aircraft of GUAP (Head Agency of Aviation Industry) under the supervision of A.S. Yakovlev. During World War II Yakovlev designed and produced a famed line of fighter aircraft . Irkut acquired Yakovlev in April 2004. The Russian government merged the holding company with Mikoyan , Ilyushin , Irkut, Sukhoi and Tupolev as

132-865: Was redesignated as the SJ-100, and the Irkut MC-21 also adopted the Yakovlev name. The company was sanctioned by the Canadian government on 22 August 2023. OKB OKB ( Russian : ОКБ ) is a transliteration of the Russian initials of " опытно-конструкторское бюро " – opytno konstruktorskoye byuro , meaning 'experiment and design bureau'. During the Soviet era , OKBs were closed institutions working on design and prototyping of advanced technology , usually for military applications . The corresponding English language term for such

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144-637: Was unsuitable for operations on rough or snow-covered runways, and so was rejected for Soviet service, although a few units were built in Czechoslovakia as the C-11U. The Yak-11 entered service in 1947, serving as a standard advanced trainer with the Soviet Air Forces and DOSAAF . Both the Yak-11 and C-11 were used in all Warsaw Pact countries and were exported to eighteen countries, including many African, Middle Eastern and Asian countries. Egyptians used

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