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Gull Wing
The gull wing is an aircraft wing configuration, known also as ''Pulaski wings'', with a prominent bend in the wing inner section towards the wing root. Its name is derived from the seabirds which it resembles. Numerous aircraft have incorporated such wings for a diverse range of purposes. The gull wing was commonly used to improve visibility in a high wing arrangement, because such wing could be thinnest by the fuselage, and in theory should limit pilot's view no more than A-pillars of a windscreen in a car body. Gliders were the first aircraft to feature the gull wing, starting with the Weltensegler in 1921; it was not until the record-breaking Fafnir at the end of that decade did the configuration gain popularity. Beyond becoming popular for the next three decades amongst high-performance gliders, various ground-based aircraft and flying boats also adopted various forms of gull wings. It rose to particular prominence in Poland, where the Polish aviation designer Zygmunt P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DFS Habicht E 1
DFS may refer to: Brands and enterprises * Dancer Fitzgerald Sample, advertising agency, now Saatchi & Saatchi * DFS Furniture, a furniture retailer in the United Kingdom and Ireland * DFS Group (Duty Free Shoppers), Hong Kong * DFS Program Exchange, a former syndicator of TV programs * Discover Financial Services, NYSE symbol Organizations * Department of Field Support, a UN department * Department of Financial Services (other) * Department of Financial Studies, University of Delhi, India * Det frivillige Skyttervesen, the National Rifle Association of Norway * Deutsche Flugsicherung, the German air traffic control organisation * Deutsche Forschungsanstalt für Segelflug (German Research Institute for Sailplane Flight) * Dirección Federal de Seguridad, Federal Direction of Security, Mexico * New York State Department of Financial Services Science and technology Computing * Depth-first search, an algorithm for traversing or searching tree or graph data structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junkers Ju 87
The Junkers Ju 87 or Stuka (from ''Sturzkampfflugzeug'', "dive bomber") was a German dive bomber and ground-attack aircraft. Designed by Hermann Pohlmann, it first flew in 1935. The Ju 87 made its combat debut in 1937 with the Luftwaffe's Condor Legion during the Spanish Civil War of 1936–1939 and served the Axis in World War II from beginning to end (1939–1945). The aircraft is easily recognisable by its inverted gull wings and fixed spatted undercarriage. Upon the leading edges of its faired main gear legs were mounted ram-air sirens known as ', which became a propaganda symbol of German air power and of the so-called '' Blitzkrieg'' victories of 1939–1942, as well as providing Stuka pilots with audible feedback as to speed. The Stuka's design included several innovations, including automatic pull-up dive brakes under both wings to ensure that the aircraft recovered from its attack dive even if the pilot blacked out from the high g-forces. The Ju 87 operate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DFS Reiher
The DFS Reiher (in English ''Heron'') was a single seat competition glider designed in Germany by Hans Jacobs and first flown in 1937. The type won the last two German Rhön gliding championships before the start of World War II. Six were factory produced. Design and development In 1935 Hans Jacobs had been asked by Alexander Lippisch to become chief designer of sailplanes at the nationalised Deutsche Forschungsanstalt für Segelflug (DFS) at Darmstadt, after the closure of the RRG ( Rhön-Rossitten Gesellschaft) on the Wasserkuppe in 1933. In 1936 there was more recognition of the need for fast gliders with high wing loading and low camber to fare better in competitions by moving quickly between strong thermals; the hope was that camber-changing flaps would enhance lift in the climb. The Reiher was Jacobs' attempt to build these qualities into a new sailplane, using all the DFS design and prototype production facilities and skills. It was an all-wood aircraft with a mid-m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DFS Kranich
The DFS Kranich is a type of German glider. It was developed by Hans Jacobs for the Deutsche Forschungsanstalt für Segelflug (DFS). History Series production of the Kranich (Crane) took place in the aircraft division of Karl Schweyer AG in Mannheim. The two-seater was, in its version 2, the most widely built two-seat glider in Germany from 1935 to 1939. Several hundred examples were built; exact numbers are not known. On 11 October 1940 Erich Klöckner in a Kranich achieved the record height in a glider of 11,460 m (37598 ft). Because it occurred in wartime, the altitude record was not recognized by the Allied occupying powers, and Klöckner only received official recognition by the Fédération Aéronautique Internationale (FAI) in the late 1990s.aerokurier magazine 1/1999: Erich Klöckners Vorstoß zur Tropopause, Motor Presse 1999 This record height was only exceeded ten years after the flight by the American Bill Ivans during a similar scientific program in the Sierra Ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DFS Habicht
The DFS ''Habicht'' (German: "Hawk") is an unlimited aerobatic sailplane that was designed in 1936 by Hans Jacobs with support provided by the Deutsche Forschungsanstalt für Segelflug. Four planes were made available for the Olympic Games of 1936, where the maneuvers of the Habicht over and literally inside the Olympic stadium enthralled spectators. The flight qualities of the Habicht were praised by pilots, including Hanna Reitsch. It participated in many airshows abroad before the war, including the 1938 National Air Races in Cleveland, Ohio.Reitsch, H., 1955, The Sky My Kingdom, London: Biddles Limited, Guildford and King's Lynn, Modified versions of the Habicht, dubbed the Stummel-Habicht ("Stumpy Hawk"), were used to train pilots to fly the Messerschmitt Me 163 Komet rocket-powered fighter. Trainees included students from the Hitler Youth Glider Schools. The Me 163 was designed to use its entire load of rocket fuel to reach combat altitude of approximately , before ret ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bowlus 1-S-2100
The Bowlus 1-S-2100 Senior Albatross was a 1930s single-seat glider designed by William Hawley Bowlus for Bowlus Sailplane Company Ltd. The aircraft is based on a prototype glider the "Super Sailplane" designed by Bowlus, and instructor Martin Schempp, built by students at the Curtiss-Wright Technical Institute The Curtiss-Wright Technical Institute was an early professional trade school operated by the Curtiss-Wright corporation for aircraft maintenance training. Director Major C. C. Moseley was one of only three school directors selected across Ameri .... Specifications See also References Bibliography *Coates, Andrew, ''Jane's World Sailplanes and Motorgliders''. London. Macdonald and Jane's Publishers Ltd., 1978. *Simons, Martin. ''Sailplanes 1920 - 1945'' (Volume 1). Eqip Werbung & Verlag Gmbh (2004) External links Bowlus 1-S-2100 Senior Albatross [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magdeburg
Magdeburg (; nds, label=Low Saxon, Meideborg ) is the capital and second-largest city of the German state Saxony-Anhalt. The city is situated at the Elbe river. Otto I, the first Holy Roman Emperor and founder of the Archdiocese of Magdeburg, was buried in the city's cathedral after his death. Magdeburg's version of German town law, known as Magdeburg rights, spread throughout Central and Eastern Europe. In the Late Middle Ages, Magdeburg was one of the largest and most prosperous German cities and a notable member of the Hanseatic League. One of the most notable people from the city is Otto von Guericke, famous for his experiments with the Magdeburg hemispheres. Magdeburg has been destroyed twice in its history. The Catholic League sacked Magdeburg in 1631, resulting in the death of 25,000 non-combatants, the largest loss of the Thirty Years' War. During the World War II the Allies bombed the city in 1945 and destroying much of it. After World War II the city belonge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wasserkuppe
The is a mountain within the German state of Hesse. It is a large plateau formation at an elevation of and is the highest peak in the Rhön Mountains. Great advances in sailplane development took place on the mountain during the interwar period, driven by annual contests. Near the summit there is still an airfield used by gliding clubs and pilots of light aircraft. Etymology The German name is derived from ''Wasenkuppe, Asenberg'' or ''Weideberg'' and means ''Pasture mountain''. Geography The Wasserkuppe lies in the administrative district Fulda north of Gersfeld. Other villages nearby are Poppenhausen ( west - south west) and Wüstensachsen ( east, part of Ehrenberg, Hesse). It is part of the Rhön Biosphere Reserve. The Wasserkuppe sources the spring of the river Fulda (the western source of the Weser) and the river Lütter which joins the Fulda after . The other peaks near the Wasserkuppe are Abtsrodaer Kuppe (north, NN), (east, NN) and Pferdsk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lift-to-drag Ratio
In aerodynamics, the lift-to-drag ratio (or L/D ratio) is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air. It describes the aerodynamic efficiency under given flight conditions. The L/D ratio for any given body will vary according to these flight conditions. For an aerofoil wing or powered aircraft, the L/D is specified when in straight and level flight. For a glider it determines the glide ratio, of distance travelled against loss of height. The term is calculated for any particular airspeed by measuring the lift generated, then dividing by the drag at that speed. These vary with speed, so the results are typically plotted on a 2-dimensional graph. In almost all cases the graph forms a U-shape, due to the two main components of drag. The L/D may be calculated using computational fluid dynamics or computer simulation. It is measured empirically by testing in a wind tunnel or in free fligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dihedral (aircraft)
In aeronautics, dihedral is the angle between the left and right wings (or tail surfaces) of an aircraft. "Dihedral" is also used to describe the effect of sideslip on the rolling of the aircraft. Dihedral angle is the upward angle from horizontal of the wings or tailplane of a fixed-wing aircraft. "Anhedral angle" is the name given to negative dihedral angle, that is, when there is a ''downward'' angle from horizontal of the wings or tailplane of a fixed-wing aircraft. Dihedral angle has a strong influence on dihedral effect, which is named after it. Dihedral effect is the amount of roll moment produced in proportion to the amount of sideslip. Dihedral effect is a critical factor in the stability of an aircraft about the roll axis (the spiral mode). It is also pertinent to the nature of an aircraft's Dutch roll oscillation and to maneuverability about the roll axis. Longitudinal dihedral is a comparatively obscure term related to the pitch axis of an airplane. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Lippisch
Alexander Martin Lippisch (November 2, 1894 – February 11, 1976) was a German aeronautical engineer, a pioneer of aerodynamics who made important contributions to the understanding of tailless aircraft, delta wings and the ground effect, and also worked in the U.S. Within the Opel-RAK program, he was the designer of the world's first rocket-powered glider. He developed and conceptualized delta wing designs which functioned practically in supersonic delta wing fighter aircraft as well as in hang gliders. People he worked with continued the development of the delta wing and supersonic flight concepts over the 20th century. His most famous designs are the Messerschmitt Me 163 rocket-powered interceptorReitsch, H., 1955, The Sky My Kingdom, London: Biddles Limited, Guildford and King's Lynn, and the Dornier Aerodyne. Early life Lippisch was born in Munich, Kingdom of Bavaria. He later recalled that his interest in aviation began with a demonstration conducted by Orville Wrigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pulley
A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt, or transfer of power between the shaft and cable or belt. In the case of a pulley supported by a frame or shell that does not transfer power to a shaft, but is used to guide the cable or exert a force, the supporting shell is called a block, and the pulley may be called a sheave. A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain. The earliest evidence of pulleys dates back to Ancient Egypt in the Twelfth Dynasty (1991-1802 BCE) and Mesopotamia in the early 2nd millennium BCE. In Roman Egypt, Hero of Alexandria (c. 10-70 CE) identified the pulley as one of six simple machines used to lift weights. Pulleys are assembled to form a block and tackle in order to provide mechanical advantage to apply large forces. Pulleys ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
