Forward-swept Wing
A forward-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. Characteristics The forward-swept configuration has a number of characteristics which increase as the angle of sweep increases. Main spar location The rearward 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 rearmost 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 design. This allows full aileron control despite loss of lift, and also means that drag-inducing leading edge slots or other devices are not required. With the air flowing i ...
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Sukhoi Su-47 Berkut (S-37) In 2001
The Sukhoi Su-47 ''Berkut'' (russian: Сухой Су-47 Беркут, translation=Golden Eagle) (NATO reporting name Firkin), also designated S-32 and S-37 (not to be confused with the twin-engined delta canard designButtler, Tony and Gordon, Yefim. "Soviet Secret Projects: Fighters Since 1945". Midland Publishing, 2005. . offered by Sukhoi in the early 1990s under the designation Su-37) during initial development, was an 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)
that 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 ...
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