For extremly manoeuvrability and high angles of attack, the SU-47 Berkut (Golden Eagle), initially called the S-37, uses a forward-swept wing configuration. The Su-47 completed the first stage of flight trials in December 2001.The Su-47 has extraordinarily high agility at subsonic speeds, enabling the aircraft to alter its angle of attack and its flight path terribly quickly. It also retains it's high manoeuvrability in supersonic flight.
The design of the terribly high manoeuvrability prototype relies on the avionics and aerodynamics technologies developed for the Su-27 upgrade programme.
Some of the systems and part designs from the Su-27, (the all weather supersonic fighter aircraft with Nato reporting name Flanker), have been employed in the Su-47, for example the design of the canopy, landing gear, number of the avionics and also the near-vertical tails.
