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Forward-swept Wing
A forward-swept wing or reverse-swept wing is an aircraft wing configuration in which the quarter-chord line of the wing has a forward sweep. Typically, the leading edge also sweeps forward. Aircraft with forward-swept are more maneuverable, due to being able to safely sustain higher attack angles. However, they are harder to fly. Characteristics The forward-swept configuration has a number of characteristics which increase as the sweep angle, angle of sweep increases. Main spar location The aft location of the main wing spar would lead to a more efficient interior arrangement with more usable space. Inward spanwise flow Air flowing over any swept wing tends to move spanwise towards the aftmost end of the wing. On a rearward-swept wing this is outwards towards the tip, while on a forward-swept wing it is inwards towards the root. As a result, the dangerous tip stall condition of a rearward-swept design becomes a safer and more controllable root stall on a forward-swept desig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sukhoi Su-47 Berkut (S-37) In 2001
The Sukhoi Su-47 ''Berkut'' () (NATO reporting name Firkin), also designated S-32 and S-37 during initial development, was a Russian experimental supersonic jet fighter developed by the JSC Sukhoi Company. A distinguishing feature of the aircraft was its forward-swept wingRussian Aviation Page: Sukhoi S-37 Berkut (S-32) which gave the aircraft excellent agility and maneuverability. While serial production of the type never materialized and the configuration was not further pursued, the sole aircraft produced served as a technology demonstrator prototype for a number of advanced technologies later used in the |
Aeroelastic Tailoring
Aeroelastic tailoring is defined as "the embodiment of directional stiffness into an aircraft structural design to control aeroelastic deformation, static or dynamic, in such a fashion as to affect the aerodynamic and structural performance of that aircraft in a beneficial way",Shirk, M., Hertz, T., Weisshaar, T., "Aeroelastic Tailoring – Theory, Practice, Promise", ''Journal of Aircraft'', Vol. 23, No. 1, pp. 6-18, 1986. or "passive aeroelastic control".Weisshaar, T., ''Aircraft Aeroelastic Design and Analysis'', 1995 Objectives associated with aeroelastic tailoring include weight minimization, flutter, divergence, stress, roll reversal, control effectiveness, lift, drag, skin buckling, and fatigue. History According to Shirk et al., the first record of aeroelastic tailoring is from 1949 by Munk,Munk, M., "Propeller Containing Diagonally Disposed Fibrous Material," U.S. Patent 2,484,308,1111, Oct. 1949. who oriented the grain of his wooden propeller blade to create desirable d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convair XB-53
The Convair XB-53 was a proposed jet-powered medium bomber aircraft, designed by Convair for the United States Army Air Forces. With a radical tailless, forward-swept wing design, the aircraft appeared futuristic; however, the project was canceled before either of the two prototypes were completed. Design and development The project was originally designated XA-44 in 1945 under the old "attack" category. An unusual forward-swept wing-design powered by three J35-GE turbojet The turbojet is an airbreathing jet engine which is typically used in aircraft. It consists of a gas turbine with a propelling nozzle. The gas turbine has an air inlet which includes inlet guide vanes, a compressor, a combustion chamber, and ...s, the project was developed in parallel with Convair's XB-46. The original design had a wing with a 12° forward-sweep and a solid nose section, but when the Army Air Force revamped the advanced attack aircraft requirement into a light bomber requirement in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OKB-1 EF 140
The OKB-1 '140', (sometimes known as '001') was a jet bomber produced in the USSR from 1947. Development The '140' was a reconnaissance/bomber aircraft, derived from the OKB-1 EF 131 with Soviet turbojet engines. The initial version, a tactical jet bomber with a secondary reconnaissance role, was initiated as the EF-140 by Dr. Brunolf Baade, at OKB-1, in 1947. The six Jumo 004 engines of the EF-131 were replaced by two Mikulin AM-TKRD-01 axial flow turbojets, rated at 32.372 kN (7,280 lb) thrust, in large nacelles attached to the underside of the wing at the same position. Using the airframe of the second EF-131 prototype, the '140' was very similar in appearance, and to its forebear Junkers Ju 287, with the classic Junkers-style crew compartment in the nose, wings swept forward 19°50' with marked dihedral, and the underslung engine nacelles extending forward of the leading-edge. Construction was of aluminium alloy stressed skin, with a semi-monocoque fuselage, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OKB-1 EF 131
The OKB-1/Junkers EF 131 was a jet bomber produced in Germany and the USSR from 1944. It was cancelled in August 23, 1948, after further work was stopped on the aircraft. Development The EF-131 was developed based on fragments of project documentation for the Ju 287 after the Red Army captured the Junkers factory in Dessau. The first prototype was built from components of the Junkers Ju 287 V2 and V3, the second and third prototypes (V – Versuchs – test/research/prototype) of the Luftwaffe's radical forward-swept-wing jet bomber. The V2 was nearly complete before the end of World War 2, but was hidden in the forest at Brandis along with Ju 287 V1 and eventually blown up by the Germans to avoid capture by US forces, and remnants of it, including wing sections, were taken into Red Air Force hands under military intelligence supervision along with the skeletal airframe of the unfinished V3.Lommel, Horst, 2004. ''Junkers Ju 287: The World's First Swept-Wing Jet Aircraft.'' At ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junkers Ju 287
The Junkers Ju 287 was a multi-engine tactical jet engine, jet bomber built in Nazi Germany in 1944. It featured a novel forward-swept wing, and the first two prototypes (which were aerodynamic testbeds for the production Ju 287) were among the very few Jet aircraft, jet propelled aircraft ever built with Landing gear, fixed landing gear. Development The Ju 287 was intended to provide the ''Luftwaffe'' with a bomber that could avoid interception by outrunning enemy Fighter aircraft, fighters. The swept-forward wing was suggested by the project's head designer Dr. Hans Wocke as a way of providing extra lift at low airspeeds—necessary because of the poor responsiveness of early turbojets at the vulnerable times of takeoff and landing. A further structural advantage of the forward-swept wing was that it would allow for a single massive Bomb bay, weapons bay in the best location, the centre of gravity of the plane, with the main wing spar passing behind the bomb bay. The same str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Wocke
Hans Wocke (born 2 August 1908 in Danzig, died after 1967) was a German airplane designer. He was the chief developer of Junkers (JFM AG) during World War II. One of Wocke's major achievements was the development of the Junkers Ju 287 wing design since autumn 1942. Wocke was sent to Moscow in 1946 together with Brunolf Baade where he worked on the EF131 to EF150 projects. In 1954, Wocke returned to the German Democratic Republic, moving to West Germany shortly afterwards and joining Hamburger Flugzeugbau (HFB) to head up an engineering team. In Hamburg Hamburg (, ; ), officially the Free and Hanseatic City of Hamburg,. is the List of cities in Germany by population, second-largest city in Germany after Berlin and List of cities in the European Union by population within city limits, 7th-lar ..., Wocke completed work on the HFB 320 business jet, whose wings were forward swept, a design Wocke transferred from the Junkers Ju 287 in the early 1960s. References {{DEFAULTS ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornelius XFG-1
The Cornelius XFG-1 was an American military fuel transporting towed glider, without a tailplane and with a forward-swept wing. Two were built but development ended in 1945. Design and development The Cornelius XFG-1, developed under the project designation MX-416 was an aerodynamically unusual aircraft intended for an unusual military role. George Cornelius had been experimenting with aircraft featuring differentially variable incidence since the 1920s. His first two machines were otherwise conventional but the third, the Cornelius Mallard from 1943 was not, being without a horizontal tailplane and having low aspect ratio and strongly forward swept wings. Though very different in detail, the XFG-1 built on the Mallard experience. A 1/4 scale model of the XFG-1 was built for wind tunnel tests. The ''FG'' in its designation stood for fuel glider and its role was as a fuel transport. It was to be towed behind another aircraft rather like contemporary troop carrying gliders, b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornelius Mallard
The Cornelius Mallard was a single-engined light aircraft of very unusual configuration, tailless and with a swept forward wing of variable incidence. It flew between 1943-4. Design and development The Mallard was the third aircraft type produced by Cornelius Aircraft.''Flight'' January 1990 The first two, the FreWing and the LW-1 were conventional in layout but unusual in using independently variable incidence wings for pitch and roll control. The wings of the Mallard could also be adjusted in the air,''Flight'' December 1989 but they were of low aspect ratio with marked forward sweep. The trailing edge carried conventional ailerons near the tips and elevators close to the fuselage. The Mallard was also a tailless aircraft, in the sense of lacking a horizontal tailplane. The rest of the aircraft was conventional, with single fin and rudder and a side-by-side cockpit for two behind a flat four engine. The undercarriage was fixed and of the tailwheel type. Like other Cornelius ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trapezoidal Wing
In aeronautics, a trapezoidal wing is a straight-edged and tapered wing planform. It may have any aspect ratio and may or may not be swept.G. Dimitriadis; ''Aircraft Design'Lecture 2: Aerodynamics Université de Liège. (retrieved 30 November 2015) The thin, unswept, short-span, low-aspect-ratio trapezoidal configuration offers some advantages for high-speed flight and has been used on a small number of aircraft types. In this wing configuration, the leading edge sweeps back and the trailing edge sweeps forward.Gunston, Bill. ''Jane's Aerospace Dictionary''. London, England. Jane's Publishing Company Ltd, 1980. , Page 436. It can provide low aerodynamic drag at high speeds, while maintaining high strength and stiffness. It was used successfully during the early days of supersonic aircraft. Design principles Any wing with straight leading and trailing edges and with differing root and tip chords is a trapezoid, whether or not it is swept.Tom Benson''Wing Area'' NASA (retrieved ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belyayev Babochka
The Belyayev Babochka was a tandem seat research aircraft designed in the USSR in 1939. Development Viktor Nikolayevich Belyayev had an illustrious early career with TsAGI, AVIAVnito, Aeroflot, OMOS, AGOS, KOSOS and the Tupolev OKB OKB () is a transliteration of the Russian initials for "" (), which translates to "Experimental Design Bureau." It could also mean or "Special Design Bureau" in english. During the Soviet era, OKBs were closed institutions working on design and .... He also designed and built several gliders from 1920, including flying wing designs. Belalyev and V.I. Yukharin, at the Kazan Aviation Institute, designed a tandem seat single-engine research aircraft to investigate the properties of Belyayev's forward swept wing with raked tips, used on the Belyayev DB-LK, particularly the resistance to structural instability and aileron reversal. The aircraft was to have had quite sharply swept forward inner wings, with the outer third swept back at a similar ang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
