The Su-47 Berkut (Golden Eagle) is a testbed for developing technologies for the next generation of aircraft which first flew 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. The Su-47 was introduced in January 2000 and completed the first stage of flight trials in December 2001. The aircraft is operated by the Russian Air Force
The Su-47 aircraft has very high levels of manoeuvrability with maintained stability and controllability at all angles of attack. Maximum turn rates are important in close combat and also at medium and long range, when a mission may involve engaging consecutive targets in different sectors of the airspace.
Although the SU-47 was first seen as a demonstrator program it plays an important role in the PAK FA program, which is funded by India. Based on the SU-47.
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