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Wing Fence
Wing fences, also known as boundary layer fences and potential fences are fixed aerodynamic devices attached to aircraft wings. Often seen on swept-wing aircraft, wing fences are flat plates fixed to the upper surfaces parallel to the wing chord and in line with the free stream airflow, typically wrapping around the leading edge. By obstructing span-wise airflow along the wing, they prevent the entire wing from stalling at once, as opposed to wingtip devices, which increase aerodynamic efficiency by seeking to recover wing vortex energy. As a swept-wing aircraft slows toward the stall speed of the wing, the angle of the leading edge forces some of the airflow sidewise, toward the wing tip. This process is progressive: airflow near the middle of the wing is affected not only by the leading edge angle, but also the spanwise airflow from the wing root. At the wing tip the airflow can end up being almost all spanwise, as opposed to front-to-back over the wing, meaning that the ef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wolfgang Liebe
Wolfgang Liebe (22 June 1911 in Bad Gandersheim, Germany – 21 October 2005 in Berlin, Germany) was a German aerospace engineer and pioneer in aerodynamics, specialising in research to avoid stall in airfoils. He introduced the concept of wing fences. They obstruct span-wise airflow along the wing, and are widely used specifically in early swept-wing designs. Raised in Cottbus, Germany, Liebe attended the University of Danzig, receiving his degree in aircraft engineering in 1936. Very early on he had decided to become an aircraft engineer, having been an intern at the Junkers aircraft factory in Dessau. After university he joined the Deutsche Versuchsanstalt für Luftfahrt (DVL, German Research Institute for Aviation) and concentrated on the problem of preventing stall. DVL was one of the foremost aircraft research facilities in Germany at the time. To this end he tried out various devices to increase safety on a Me 109. These trials led to a patent being granted in 1938: “Dev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tupolev Tu-22M
The Tupolev Tu-22M (russian: Туполев Ту-22М; NATO reporting name: Backfire) is a supersonic, variable-sweep wing, long-range strategic and maritime strike bomber developed by the Tupolev, Tupolev Design Bureau in the 1960s. According to some sources, the bomber was believed to be designated Tu-26 at one time. During the Cold War, the Tu-22M was operated by the Soviet Air Forces (VVS) in a missile carrier strategic bombing role, and by the Soviet Naval Aviation (''Aviatsiya Voyenno-Morskogo Flota'', AVMF) in a long-range maritime anti-shipping role. As of 2021, before the 2022 Russian invasion of Ukraine, there were 66 of the aircraft in service. Development In 1962, after the introduction of the Tupolev Tu-22, it became increasingly clear that the aircraft was inadequate in its role as a bomber. In addition to widespread unserviceability and maintenance problems, the Tu-22's handling characteristics proved to be dangerous. Its landing speed was greater than previ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tupolev Tu-160
The Tupolev Tu-160 (russian: Туполев Ту-160 Белый лебедь, translit=Belyj Lebeď, translation= White Swan; NATO reporting name: Blackjack) is a supersonic, variable-sweep wing heavy strategic bomber designed by the Tupolev Design Bureau in the Soviet Union in the 1970s. It is the largest and heaviest Mach 2+ supersonic military aircraft ever built and second to the experimental XB-70 Valkyrie in overall length. As of 2022, it is the largest and heaviest combat aircraft, the fastest bomber in use and the largest and heaviest variable-sweep wing airplane ever flown. Entering service in 1987, the Tu-160 was the last strategic bomber designed for the Soviet Union. As of 2016, the Russian Air Force's Long Range Aviation branch had 16 aircraft in service. The Tu-160 active fleet has been undergoing upgrades to electronics systems since the early 2000s. The Tu-160M modernization program of existing models has begun with the first updated aircraft delivered in Decemb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
