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SAAB Tunnan
The Saab 29 ''Tunnan'', colloquially ''Flygande tunnan'' or just ''Tunnan'' ( en, "The flying barrel", "The barrel"),. is a Sweden, Swedish fighter aircraft, fighter that was designed and manufactured by Saab Group, Saab in the late 1940s. It was the second turbojet-powered combat aircraft to be developed in Sweden, the first being the Saab 21R, and it was the first Western European fighter to be produced with a swept wing post World War II, only being preceded in Western Europe as a whole by the Me 262 built during the war.Boyne 2002, p. 547."1940s." ''Saab'', Retrieved: 27 March 2016. Despite its rotund appearance, from which its name is derived, the J 29 was fast and agile and served effectively in both fighter and fighter-bomber roles into the 1970s. Development Sweden had fallen behind the rapid technical p ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft
A WikiProject, or Wikiproject, is a Wikimedia movement affinity group for contributors with shared goals. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within sister projects such as Wiktionary, Wikiquote, Wikidata, and Wikisource. They also exist in different languages, and translation of articles is a form of their collaboration. During the COVID-19 pandemic, CBS News noted the role of Wikipedia's WikiProject Medicine in maintaining the accuracy of articles related to the disease. Another WikiProject that has drawn attention is WikiProject Women Scientists, which was profiled by '' Smithsonian'' for its efforts to improve coverage of women scientists which the profile noted had "helped increase the number of female scientists on Wikipedia from around 1,600 to over 5,000". On Wikipedia Some Wikipedia WikiProjects are substantial enough to engage in cooperative activities with outside organizations relevant to the field at issue. For e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lars Brising
Lars Harald Brising (1915-1995) was a Swedish engineer and aircraft designer. He is best known for having been chief designer for Saab 29 Tunnan which flew for the first time in 1948. He became major general (the head) of the Royal Swedish Air Force Materiel Administration. Lars Brising was the son of art historiann Harald Brising. He underwent flight training in the Swedish Air Force in 1936 and graduated from the Royal Institute of Technology (KTH) in 1938. He worked at the Royal Swedish Air Force Materiel Administration 1938–1939 and then became designer at Götaverken's aviation department in 1939 and was active at Valtion lentokonetehdas in Finland 1940. Brising was then flight test manager at Saab 1940–1941, section manager at the Royal Swedish Air Force Materiel Administration design office 1941–1943. He became technical manager of Saab's flight test department in 1943, became project engineer in 1945, construction manager for jet aircraft in 1946, chief engineer for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saab Safir
The Saab 91 Safir (Swedish for sapphire) is a three (91A, B, B-2) or four (91C, D) seater, single engine trainer aircraft. The Safir was built by Saab AB in Linköping, Sweden (203 aircraft) and by '' De Schelde'' in Dordrecht, Netherlands (120 aircraft). Design and development Development of the Safir began in 1944 as part of a plan to compensate for reductions in orders for military aircraft when the Second World War finally ended. Three major civil programmes were planned, the Type 90 Scandia airliner, the Type 91 Safir light aircraft and the Saab 92 motor car. The Safir was designed by Anders J. Andersson, who had previously worked for Bücker, where he had designed the all-wood Bücker Bü 181 "Bestmann". The Safir thus shared many conceptual design features with the Bestmann. It was primarily of metal construction, although it did have fabric-covered control surfaces. Development was slowed by the need to concentrate on more urgent military work, and by industrial act ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flap (aeronautics)
A flap is a high-lift device used to reduce the stall (flight), stalling speed of an aircraft wing at a given weight. Flaps are usually mounted on the wing trailing edges of a fixed-wing aircraft. Flaps are used to reduce the take-off distance and the landing distance. Flaps also cause an increase in Drag (physics), drag so they are retracted when not needed. The flaps installed on most aircraft are partial-span flaps; spanwise from near the wing root to the inboard end of the ailerons. When partial-span flaps are extended they alter the spanwise lift distribution on the wing by causing the inboard half of the wing to supply an increased proportion of the lift, and the outboard half to supply a reduced proportion of the lift. Reducing the proportion of the lift supplied by the outboard half of the wing is accompanied by a reduction in the angle of attack on the outboard half. This is beneficial because it increases the margin above the Stall (fluid dynamics), stall of the outboa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leading Edge Slot
A leading-edge slot is a fixed aerodynamic feature of the wing of some aircraft to reduce the stall speed and promote good low-speed handling qualities. A leading-edge slot is a spanwise gap in each wing, allowing air to flow from below the wing to its upper surface. In this manner they allow flight at higher angles of attack and thus reduce the stall speed. Purpose and development At an angle of attack above about 15° many airfoils enter the stall. Modification of such an airfoil with a fixed leading-edge slot can increase the stalling angle to between 22° and 25°.Clancy, L.J., ''Aerodynamics'', Section 6.9 Slots were first developed by Handley Page in 1919 and the first aircraft to fly with them was the experimental H.P.17, a modified Airco DH.9A. Their invention is credited jointly to Sir Frederick Handley Page and Gustav Lachmann. The first aircraft fitted with controllable slots was the Handley Page H.P.20. Licensing the design became one of Handley Page's major sou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mach Number
Mach number (M or Ma) (; ) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. It is named after the Moravian physicist and philosopher Ernst Mach. : \mathrm = \frac, where: : is the local Mach number, : is the local flow velocity with respect to the boundaries (either internal, such as an object immersed in the flow, or external, like a channel), and : is the speed of sound in the medium, which in air varies with the square root of the thermodynamic temperature. By definition, at Mach1, the local flow velocity is equal to the speed of sound. At Mach0.65, is 65% of the speed of sound (subsonic), and, at Mach1.35, is 35% faster than the speed of sound (supersonic). Pilots of high-altitude aerospace vehicles use flight Mach number to express a vehicle's true airspeed, but the flow field around a vehicle varies in three dimensions, with corresponding variations in local Mach number. The local spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Aeronautical Research Institute
National Aeronautical Research Institute ( sv, Flygtekniska försöksanstalten, abbreviated FFA), was a former Swedish state governmental authority under the Ministry of Defence with the aim to conduct research, development and experimentation in the aeronautical field. The FFA was located in Ulvsunda industrial park in Bromma, Stockholm. History The large facility at Ranhammarsvägen was designed by architect Erik and Lars-Erik Lallerstedt (father and son). The FFA was established in 1940 and its first director was Professor Ivar Malmer. Its task was, in accordance with its instruction, to promote the development of aviation technology in Sweden and remunerated conduct aeronautical research and experimentation. Operations were focused on aerodynamic research and testing activities related to the design of the lifting and controlling elements in aircraft and missiles, and partly to the strength of materials research and testing activities mainly relating to so called high-strength ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Institute Of Technology
The KTH Royal Institute of Technology ( sv, Kungliga Tekniska högskolan, lit=Royal Institute of Technology), abbreviated KTH, is a public research university in Stockholm, Sweden. KTH conducts research and education in engineering and technology and is Sweden's largest technical university. Currently, KTH consists of five schools with four campuses in and around Stockholm. KTH was established in 1827 as the ''Teknologiska institutet (Institute of Technology)'' and had its roots in the ''Mekaniska skolan (School of Mechanics)'' that was established in 1798 in Stockholm. But the origin of KTH dates back to the predecessor of the ''Mekaniska skolan'', the ''Laboratorium mechanicum'', which was established in 1697 by the Swedish scientist and innovator Christopher Polhem. The Laboratorium mechanicum combined education technology, a laboratory, and an exhibition space for innovations. In 1877 KTH received its current name, Kungliga Tekniska högskolan (KTH Royal Institute of Technol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wind Tunnel
Wind tunnels are large tubes with air blowing through them which are used to replicate the interaction between air and an object flying through the air or moving along the ground. Researchers use wind tunnels to learn more about how an aircraft will fly. NASA uses wind tunnels to test scale models of aircraft and spacecraft. Some wind tunnels are large enough to contain full-size versions of vehicles. The wind tunnel moves air around an object, making it seem as if the object is flying. Most of the time, large powerful fans suck air through the tube. The object being tested is held securely inside the tunnel so that it remains stationary. The object can be an aerodynamic test object such as a cylinder or an airfoil, an individual component, a small model of the vehicle, or a full-sized vehicle. The air moving around the stationary object shows what would happen if the object was moving through the air. The motion of the air can be studied in different ways; smoke or dye can be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landing Gear
Landing gear is the undercarriage of an aircraft or spacecraft that is used for takeoff or landing. For aircraft it is generally needed for both. It was also formerly called ''alighting gear'' by some manufacturers, such as the Glenn L. Martin Company. For aircraft, Stinton makes the terminology distinction ''undercarriage (British) = landing gear (US)''. For aircraft, the landing gear supports the craft when it is not flying, allowing it to take off, land, and taxi without damage. Wheeled landing gear is the most common, with skis or floats needed to operate from snow/ice/water and skids for vertical operation on land. Faster aircraft have retractable undercarriages, which fold away during flight to reduce drag. Some unusual landing gear have been evaluated experimentally. These include: no landing gear (to save weight), made possible by operating from a catapult cradle and flexible landing deck: air cushion (to enable operation over a wide range of ground obstacles and wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermann Behrbohm
Otto ''Hermann'' Bernhard Behrbohm, born 30 October 1907 in Karlsruhe, Grand Duchy of Baden, Imperial Germany; died 12 October 1977 in Fingelsham, Northbourne, Kent, United Kingdom, was a German mathematician active in Sweden and Germany. He was significant in the mathematics behind the development of the Aerodynamics of the Delta wing concept and the technology of Supersonic flight. Biography Hermann Behrbohm was significant in the design of Saab 35 Draken and Saab 37 Viggen. He made the calculations supporting Alexander Lippisch developing the Delta wing concept at the end of the war. He received the Swedish Aeronautical Society's Thulin Medal 1968 in silver for having promoted aviation technology with work. He made efforts in aviation technology in several countries during his life, due to the circumstances. Finally, as a pensioner, 1972 he moved to England with his British wife. His children stayed in Sweden. He authored many articles in aerodynamic and mathemati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frid Wänström
''Frid'' Benjamin Filippus Wänström (May 8, 1905, Lidköping – September 11, 1988, Linköping) was a Swedish aviation engineer who after KTH Royal Institute of Technology in 1932 was employed by the flygstyrelsen (predecessor to Royal Swedish Air Force Materiel Administration), from 1936 head of the calculation department Saab AB in Linköping. Frid Wänström is mentioned for leading the work with Saab 29 Tunnan. It was the first fighter aircraft in Sweden with Swept wing. Information about arrow wings came from Switzerland and should have included drawings on Messerschmitts Me P1101, P1110, P1111 and P1112. SAAB:s project manager Frid Wänström fetched these secret papers from Switzerland to Sweden in 1945. The documents came from engineers from Messerschmitt who moved to Switzerland at the end of World War II. Frid Wänström also participated in the following Saab projects Saab 32 Lansen, Saab 35 Draken and Saab 37 Viggen The Saab 37 Viggen ( Swedish for ''"the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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