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The first delta-wing prototype (named Ye-4, written also E-4) flew in 14 June 1956, and the production Mig-21 entered service in early 1959. The MiG-21 saw frequent action in the Vietnam War and was one of the most advanced aircraft at the time. However, many North Vietnamese aces preferred flying the MiG-19, due to the wingload on the MiG-21's wings. Employing a delta wing configuration, it was the first successful Soviet aircraft combining fighter and interceptor in a single aircraft. It was a lightweight fighter, achieving Mach 2 speed using a relatively low-powered afterburning turbojet, and is thus comparable to the American F-104 Starfighter and French Dassault Mirage III. It was also used extensively in Middle East conflicts of the 1960s and 1970s, by the air forces of Egypt, Syria and Iraq against Israel. It was used also in early stages of the wars in Afghanistan but soon outclassed by the newer MiG-23 and MiG-27. Versions
Foreign versionsThe production of MiG-21s (bis variant) under license by HAL of India lasted till 1984. Despite a series of crashes over the last decade, and acquiring the nickname "flying coffin", the Indian Air Force has decided to upgrade about 125+50 of the Mig-21bis in its inventory to the Mig-21 Bison standards which will serve the Indian Air Force till the year 2015. Unlicensed Chinese copies of the MiG-21 are designated Chengdu J-7 and F-7 (for export). Israeli Aircraft Industries manufactures an upgraded model called the MiG-21-2000.
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