a russian test plane, the 'berkut' is a fighter designed to test new aircraft metals. because its wings are sweped forward only special metals can be used. however only one exsits right now, but there is word speading that it might become a combat fighter.
i was flying my Su-47 in ace combat, when i saw 2 F-15s i shot one down and the other got away.
Ok I felt that my earlier definition about the Su-47 didn't cover much. The Su-47 is an deraitve of the Su-27, the Su-47 and MiG 1.44 are both test beds for the Sukoi PAK FA program, it's first name was S-37. The wing design is not like most other aircraft, the Su-47 has forward swept wings, and titanium aloys used for the wing construction, normal materials used like on most aircraft would just come apart when the Su-47 pulls manuvers. The Su-47's cockpit was designed to the pilot would have the most comfort while pulling high G manuvers or ejecting, it also has a low-travel side mounted control stick, the seat is inclined at an angle of 60 degrees, so the pilot can pull high G manuvers and still stay in control of the aircraft.more...
Length: 22.6 m (74 ft 2 in)
Wingspan: 15.16 m to 16.7 m (49 ft 9 in to 54 ft 9 in)
Height: 6.3 m (20 ft 8 in)
Wing area: 666 ft² (61.87 m²)
Empty weight: 36,100 lbs (16375 kg)
Loaded weight: 55,115 lb (25,000 kg)
Max takeoff weight: 77,162 lbs (35,000 kg)
Powerplant: 2× Lyulka AL-37FU(planned) flying prototypes used 2 Aviadvigatel D-30F6 afterburning, thrust-vectoring (in PFU modification) turbofans with digital control
Dry thrust: 83.4 kN (18,700 lbf) each
Thrust with afterburner: 142.2 kN (32,000 lbf) each
Thrust vectoring: ±20° at 30° per second in pitch and yaw
Maximum speed: Mach 1.62 ((1500 kmh, 1056 mph)
* At sea level: Mach 1.31 (1,400 km/h, 870 mp...