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It had a unique mechanism for wing sweep that combined tracks on the fuselage sides and the underside of the wings, which was actuated by hydraulically-driven ball screws positioned at the wing's inner ends. [20] The wings could be swept from 20 degrees to 70 degrees; at the 70-degree position, longitudinal control was maintained by wing tip ...
The Su-47 uses a forward wing sweep, while the Su-27s sport a more conventional backward-swept design. A swept wing is a wing angled either backward or occasionally forward from its root rather than perpendicular to the fuselage. Swept wings have been flown since the pioneer days of aviation.
A tandem wing design has two wings, one behind the other: see Tailplanes and foreplanes below. Some early types had tandem stacks of multiple planes, such as the nine-wing Caproni Ca.60 flying boat with three triplane stacks in tandem. A cruciform wing is a set of four individual wings arranged in the shape of a cross. The cross may take either ...
To test the low-speed characteristics of swept wings, the US Navy contracted Bell Aircraft to modify two P-63 Kingcobras [note 1] as test aircraft for use by NACA. [2] These aircraft, assigned the bureau numbers 90060 and 90061, [ note 2 ] were designated L-39-1 and L-39-2 , based on Bell's code letter "L" and the aircraft's model number "39".
The wings can sweep from 15 degrees to 67.5 degrees (full forward to full sweep). Forward-swept wing settings are used for takeoff, landings and high-altitude economical cruise. Aft-swept wing settings are used in high subsonic and supersonic flight. [74] The B-1's variable-sweep wings and thrust-to-weight ratio provide it with improved takeoff ...
Forward-swept wings designs, some whose design had begun during the prewar period, were developed during World War II, independently in Germany, the Soviet Union, Japan, and the United States. An early example to fly, in 1940, was the Soviet Belyayev DB-LK, a twin-boom design with forward-swept outer wing sections and backwards-swept tips. It ...
Four basic configurations which have used vortex lift are, in chronological order, the 60-degree delta wing; the ogive delta wing with its sharply-swept leading edge at the root; the moderately-swept wing with a leading-edge extension, which is known as a hybrid wing; and the sharp-edge forebody, or vortex-lift strake. [7]
The wing span was 12.0 metres (39.4 ft) when unswept and 10.0 metres (32.8 ft) when fully swept. [3] The long main undercarriage retracted into the wing, while a nose wheel completed the tricycle undercarriage. [4] The P.202 was powered by a pair of BMW 003 turbojets, slung underneath the fuselage centre section and exhausting behind the wing.