Su-47

The project developed first as a promising fighter model with a backward-swept wing for the USSR Air Force ( Su-27 modernization, C-37 theme) as part of a sectoral research program since 1983, but this topic was closed in 1988. After that, the project was ordered by the USSR Navy , which predetermined the further development of the project as a promising aircraft for aircraft carrying cruisers. The project was renamed and named Su-27KM (ship modified) ^{[2] [3]} . Subsequently, after the collapse of the USSR and the crisis in the country in the 1990s, government funding from the project was withdrawn and it continued only thanks to its own financing of the Sukhoi Design Bureau . As a result, after all the twists and turns, the plane was presented to the public at the MAKS -1999 exhibition under the name C-37 "Berkut", and by MAKS-2001 it was renamed to Su-47 "Berkut". In 1997, the first flying Su-47 was built; now it is experimental.

In 2006-2007 after the modernization of the cargo compartment, the aircraft was involved in the program to create the design of the T-50 fighter (hereafter Su-57 ). The goal was to check the doors and internal equipment of the compartment for operability in real flight conditions. The information was actively used in the final stages of creating the cargo shackles of the promising T-50 fighter.

The only copy is in the museum LII them. Gromov .

The “eagle” is made according to the aerodynamic scheme “longitudinal integral ^[4] triplane ” with a backward-swept wing (CBS) . The wing smoothly mates with the fuselage , forming a single carrier system. The layout features include developed wing overhangs, under which are placed unregulated air intakes of engines, having a cross-sectional shape close to the sector of a circle.

The wing of the fighter has a developed root part (about 75 °) and an interchangeable sweep angle (about 10 °) on the leading edge and a cantilever part with reverse sweep (on the leading edge - about 20 °) that smoothly mates with it. The wing is equipped with flaperones , which occupy more than half of the span, as well as ailerons . The full turning front horizontal tail (GIP) with a span of about 3.5 m has a trapezoidal shape. The sweep angle on the leading edge is about 50 °. The rear horizontal tail of a relatively small area is also made of one turn, with a sweep angle on the leading edge of about 75 °.

The main disadvantage of the reverse-swept wing pattern is the effect of elastic divergence (twisting followed by destruction). This forced the designers to seriously modify the original design of the fighter, which eventually led to the creation of the C-37, which later received the designation Su-47 Berkut. ^[five]

Materials

Glider aircraft made with extensive use of composite materials . For example, the wing of the aircraft is made of composite materials based on carbon fiber at the enterprise "ORPP" Technology "" ^[6] .

The use of promising composites provides an increase in weight efficiency by 20–25%, a resource — by 1.5–3.0 times, a material utilization rate to 0.85, a reduction in labor costs for manufacturing parts by 40–60%, as well as obtaining the required thermal and physical properties. radio specifications. At the same time, experiments conducted in the United States under the F-22A program indicate a lower combat survivability of CFRP structures compared to structures made of aluminum and titanium alloys that can withstand stalling and high pressure.

Avionics

The project assumed that the car would use the most modern on-board equipment - digital multichannel DESU (on the first plane - analog), an automated integrated control system, a navigation complex, which includes ANS on laser gyroscopes in combination with satellite navigation and "Already found use on such machines as the Su-30MKI , Su-34 and Su-27M . It was planned to equip the integrated life support and ejection crew of the new generation.

To control the aircraft, as well as on the Su-37, a lateral low-speed control knob and a strain gauge thruster (on the first plane of the central switchboard) were used.

The placement and dimensions of the antennas of avionics equipment indicate the desire of designers to provide all-round visibility. In addition to the main radar located in the nose under the finned fairing, the fighter has two rear-view antennas installed between the wing and the engine nozzles.

Armament

The Su-47 is experimental and was designed to work out the airframe layout, layout solutions and materials, so the weapons could not be deployed without additional modernization of the aircraft. During the development of the Su-57 , the Su-47 airframe was upgraded and received one bomb bay , the experience of which was later applied to the Su-57 ^[7] .

During the development, it was planned that the fighter’s “main caliber” would obviously be medium-range guided missiles of the RVV-AE type , with an active radar end-homing system and optimized for placement in the cargo compartments of airplanes (they have a small elongation wing and folding lattices ). NPO "Vympel" announced a successful flight test on the Su-27 an improved version of this rocket, equipped with a marching ramjet engine. The new modification has an increased range and speed.

The short range air-to-air missiles should also be important in aircraft armament. The MAKS-97 exhibition demonstrated a new rocket of this class, the K-74 , based on the UR R-73 and differing from the last improved thermal homing system, which has a target locking angle, increased from 80–90 ° to 120 °. The use of a new thermal homing head (TGS) also made it possible to increase the maximum target range by 30% (up to 40 km).

Probably, the 30-mm gun GS-30-1 will be preserved in the composition of the on-board armament of promising fighters.

It was planned that, like other domestic multifunctional aircraft - Su-30MKI , Su-35 and Su-37 , the new machines will carry and strike armament - high-precision SD and air-to-ground aircraft for destruction of ground and surface targets, as well as radar the adversary.

Specifications

• Crew : 1 person
• Length : 22.6 m
• Wing Span: 16.7 m
• Height : 6.4 m
• Wing area : 56 m²
• Area GO : 5.7 m²
• Weight empty : 19,500 kg
• Normal take-off weight : 26,500 kg
• Maximum take-off weight : 38500 kg
• Fuel weight : 12,000 kg

Engine

• Engine type : Turbojet dual circuit with afterburner
• Model : R-179-300 (for a production aircraft), D-30F6 (for a prototype)
• Traction :
  • maximum : 2 × 12,400 kgf (P-179-300)
  • afterburner : 2 × 17500 kgf (P-179-300) 2 × 15500 ( D-30F6 )

Flight characteristics

• Speed limit :
  • at an altitude of 2500 km / h (limited to 900 km / h due to destructive loads on the wing and center section)
  • at the land : 1550 km / h
• Maximum speed without speed : more than 1200 km / h ( M = 1)
• Flight range :
  • Distillation (with 2 PTB) : 5500 km
  • At subsonic speed : 4000 km
  • At supersonic speed : 1600 km
• Combat radius :
  • subsonic : 2000 km
  • supersonic : 800 km
• Flight duration : 6.5 h
• Practical ceiling : 20,000 m
• Length of run-up / run : 90 m (possibility of taking off along a ballistic trajectory ^[8] )
• Wing load :
  • with a maximum take-off weight : 624 kg / m²
  • with a normal take-off weight : 429 kg / m²
• Thrust :
  • with a maximum take-off weight : 0.91 kgf / kg
  • at normal take-off weight : 1.32 kgf / kg

Armament

• Cannon :
  • 1 × 30 mm gun GSH-30-1
• Combat load :
  • Normal : 1000 kg (4 × P-77 + 4 × 9M100 (planned))
  • Maximum : 8000 kg

• X-29
• MiG 1.44
• Su-57
• CP-10

• Su-47 (S-37) "Golden Eagle"
• Photos of the Su-47 RIA News

•   Sukhoi Su-47 Berkut. Backward sweep wing