Sukhoi Su-47 Berkut
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The Su-47 fighter aircraft, previously called the S-37 Berkut or Golden Eagle, was developed by the Sukhoi Design Bureau of Moscow, Russia, and performed its first flight in September 1997.Su-47 is in a forward-swept wing configuration and uses a highly unstable triplane (with three main lifting surfaces) aerodynamic configuration.It retained some of the systems and component designs from the Su-27 (the all-weather supersonic fighter aircraft with Nato reporting name Flanker), for example, the design of the canopy, landing gear, some of the avionics, and the near-vertical tails.