Su -47 "Golden Eagle " forward-swept wing technology demonstrator experiment of Russian Sukhoi Design Bureau Open Joint Stock Company developed a multi-purpose fighter , the Russian fifth generation fighter technology demonstrator .

      Fighter Profile

September 25, 1997 first flight , first known as the S-32, soon renamed as the S-37. 2002 years and was renamed the Su- -47 . The design focused on high angle of attack maneuverability and agility and low observability aircraft , basic data on the size and weight similar to Su -37 , nose , tail and cockpit Su -35 similar to landing gear Su -27K with the same 4- by Su -35/37 redundancy digital flight control system telex . Use of forward-swept wing aircraft , has obvious side wing wing root section and long section around the machine can reduce resistance and to reduce radar reflection signals, to improve the performance of aircraft taking off and landing , high angle of attack at subsonic and when there are Good aerodynamic performance , increase aircraft range and high-altitude maneuverability , and can take full advantage of the structural characteristics of composite materials . Fan is not adjustable inlet Road, located on the bottom side section , S -shaped inlet side near the wing leading edge with canard . Vertical tail slightly tilted outward , the central body with two large auxiliary intake valve , and the use of radar absorbing paint on the stealth aircraft handling . Because of funding constraints, the first two phases of aircraft flight tests that ended mid-2000 , flying a total of 90 times, for a subsonic and supersonic flight . May 2001 , the aircraft began the third phase of flight testing for the development of Russia's fifth generation fighter aircraft to accumulate experience , flight testing will continue into 2005. May 2002 , Sukhoi was selected as the Russian fifth generation fighter aircraft 's main development business . Russia's fifth generation fighter aircraft in performance can not be lower than the United States, JSF, in a series of parameters is not less than the F-22, the main feature is the versatility of the first ( both air and also against ground targets ), super maneuverability ( To complete the low and high angle of attack of controlled flight ), stealth (optical , infrared and radar bands of low observability ), short distance movements (in the use of 300 to 400 m long runway movements ), may be Based on the development machine , but not with forward-swept wing . The machine also will be renamed Sukhoi SU -47 , stressed the machine not only verify the machine , the future will develop into a production aircraft.

        Design layout

Su -47 for the string -mounted 3 -wing, swept wing for the former type , with the integration of agent technology . As a result of radar absorbing coating and a large number of composite materials , and the use of curved inlet , conformal external frame , forward-swept wing design measures such as the plane on the radar reflector is very small, about 0.5 to 3 square meters . Without airspeed , aircraft length 22.6 meters . Body for the airborne radar head cabin , with space velocity at the oval bar is the radar antenna inside the radome . Followed by optical radar , cockpit , cockpit lower the landing gear compartment for the former . By Su-27 type cockpit canopy , fixed by the frame without the front grid ( bubble type) and to open the hatch form . Middle body extension LEX with the integration of its fuel within the tanks, equipment cabin and engine inlet , under which is the main landing gear compartment . LEX can not be regulated under the inlet side , the shape of fan . After the section of the fuselage two very similar engine nacelle , the wing Chengli Liang , vertical tail end of the bearing pieces of the peace , fuselage fairing most end of the two devices . A forward extension of the wing edge wing root section , which is equipped with front horizontal tail and the forward sweep -type wing , wing leading edge sweep angle is -20 °. Wing structure, extensive use of composite materials . After the outer edge of a wing aileron and flap ( lapel flaps ), may be the next front side . All -action Hirao ladder leading edge sweep angle than the Su-27 's large , reaching about 75 ° , flat tail show 8 meters . All -action front horizontal tail is also a trapezoid , its leading edge sweep angle of about 50 °, has a wingspan of 7.5 meters . Twin-tail shape and Su-27 's similar, but not out of the installation angle , and with the rudder . Aircraft weigh 35 tons.

        Design Features

Aircraft with three-point retractable landing gear . Wheel -type landing gear forward earnings before the cockpit . Before the landing gear door for the single block . Main landing gear single wheel mounted on the camera body , a rotation angle of advance income opportunity income below the engine inlet . Tread 4 m main landing gear , front and rear of 8 meters . The first prototype powered aircraft with afterburner two D-30F6 turbofan engine , a single thrust than 15,200 kN . By design, the aircraft will be loaded the next two thrust-vectoring nozzle can be deflected to a new generation of engines . Not yet installed the first prototype aircraft fire control system, but can be considered in the batch production aircraft will be equipped with Su-35 and Su-37 of the Universal Fire Control System , including the band slot antenna or phased array airborne radar , Optical radar and helmet targeting system. Improved airborne weapons carried by Su-27 will not be much difference , including the forward shooting Gsh-301 30 mm air cannon , various types of other R-27 Medium Range Air to Air Missile , RVV- AE ( after launching air to air missile ) and R-73 Short Range Air to air missiles, and a variety of guided and non guided ground attack weapons . All kinds of weapons are hanging in the fuselage on pylons under the conformal , if necessary, can also be hung on the wing . Aerodynamic layout and structure of the string set three wing layout , forward-swept wing structure of 90% composite materials, leading edge swept 20 °, with full development of long flaps , trailing edge swept 37 °, inside the Common flap , outside the ailerons , wing tips for the arc . Full-motion close- coupled canard , leading edge swept 50 °, trailing edge swept -16 °, can be synchronized or differential deflection . Wing wing root extends back to the tail of the horizontal stabilizer, leading edge sweep angle 70 °, vertical tail outward tilt of about 6 °, leading edge swept back 45 °, with built-in rudder . Body for the airborne radar head cabin , mid- wing side with the extension of the integration of articles , there are tanks , equipment cabin and the inlet, after the section of the fuselage for the engine nacelle , the wing Chengli Liang , tail support , and Two asymmetric tail cone . Two prototype power plant , the first one is used for the MiG -31 of two D-30F6 engines , a single static thrust 93.1 kN , 151.9 kN thrust afterburning ; the first two use two AL- 37FU engine, single afterburning thrust of 142.2 kN , with a thrust vector control and full authority digital engine control system. Cockpit single seat cockpit , ejection seat tilted back 30 ° installation, windshield and canopy with the same SU -27 . Head -board equipment with multifunction phased array radar, right after the end there , as the radar cone .

        Weapons Configuration

Weapons and a 30 mm GSh-30 machine gun, and Beitan 150 hair, using conformal weapons pylons can carry weapons , including : R-77, R-77PD, R-73, K-74 air to air missiles, and X-29T , X-29L, X-59M, X-31P, X-31A air- surface missiles and KAB500, KAB1500 laser-guided bombs .

        Dimensions

Captain : 22.2 ~ 22.6 m Height: 6.30 ~ 6.40 m Wingspan: 15.2 ~ 16.7 m wing area: 56 square meters before the wing area: 5.7 square meters

        Performance Data

Empty weight : 14400kg normal take-off weight : 25600kg Maximum Takeoff Weight : 34000kg height maximum level flight speed : 2500km / h sea-level maximum level flight speed : 1400km / h Service ceiling : 18000m range : 3300km limit overload +9 g

        Operational performance

As the troops will be equipped with the fifth generation fighter , the development work started , took excellent operational performance as a necessary goal . (Due in January 2010 T-50 flight test , to confirm that this aircraft will no longer be the Russian Air Force ) . Sukhoi aircraft design bureau chief architect of the decision -Soviet -47 Ximonuofu two research programs are based on pre- swept wing , In this issue, he is thoughtful . This is mainly the shape of the wing compared with the other , forward-swept wing has many outstanding advantages. Forward-swept wing of the allowable angles of attack , may increase the aircraft 's turning angular velocity ; resistance ; tip flow separation does not occur , it can increase lift , thus significantly increase the aircraft 's lift-drag ratio; also can improve the layout , Reducing the head of the radar reflection area . F-16 United States in the development process, have developed a prototype with a forward-swept wing SFW/F-16, the wing sweep angle is -20 ° ~ -25 ° conditions, according to calculations, Aircraft turning angular velocity can be increased 14 percent , the activities of the aircraft can increase the radius of 34 percent , taking off and landing distance can be reduced 35 percent ~ 50 percent . However, forward-swept wing there is a fatally flawed - structural divergence problem , in general , people also can not be introduced to this attractive but there is a significant risk, technology . In aviation history , only three kinds of forward-swept wing aircraft completed a flight test , and have achieved some success . The first is the Nazi Germany Ju 287 with four bombers, in February 1945 completed the first flight , in a later test in the speed of 815 km / h , when only two prototypes were captured by Soviet troops ; s Two American Grumman 's X-29A forward-swept wing research aircraft , were made of two , at December 14, 1984 flight . In 1984 and 1989, two research aircraft were hundreds of hours of flight , speed up the M1.6, altitude 15,000 meters , overload 6.4g. But X-29A is a research machine, machine no weapons and equipment, the design did not use " stealth " technologies; third is Russia's fifth generation fighter -S-47 " Golden Eagle " was . Since World War II, the former Soviet Union captured the German swept -wing bomber Ju 287 , and a lot of information and experts , on the forward-swept wing technology has made a certain understanding. Since entering 80 , the Russian Central Institute of Aviation hydrodynamic some experts , but also using the latest scientific and technological achievements , of the forward-swept wing technology for a system of research, and made a breakthrough , so as to proceed with the development from the late 80 's S- 37 with forward-swept wing technology foundation . As planned, two will be installed by the Soviet -47 Lyulka " Saturn " Design Bureau developed the thrust vector can be controlled by AL-41F turbofan engine with afterburner , thrust of 20 tons , to ensure the aircraft has good acceleration , maneuverability and supersonic cruise without afterburner capability . Su -47 attaches great importance to the design of " stealth "capability , in the shape design of a large number of aircraft using inclusive , cover block , scattering and cooling technology . Such as radar reflection signal strong inlet , the engine compressor and plug-in arms , all using the inclusive , cover block ; on the radiation intensity infrared signal the end of the engine vents , etc. , in addition to aircraft block structure on the cover , but also Cooling with air flow and air flow to disperse the tail . Coupled with the extensive use of composite materials and absorbing materials, the aircraft 's radar reflection signals and infrared signals is very small , while the aircraft is also equipped with various active and passive interference and deception techniques , therefore, can not find the Chengdu to enemy .

        The machine features

Su -47 has good mobility and ultra- low altitude low speed mobility , due to the high degree of automation machines will be installed in the control system and fire control system , so the aircraft can complete the 0 -speed maneuvers , but also in keeping constant track Circumstances to complete the turning radius 0 ( fixed-point turn ) and the completion of 0 radius somersault ( fixed-point tumble ), so head in the air at any time point in the enemy , and attack . As the aircraft lift-drag ratio, so the aircraft 's combat radius and the blank time larger, add the aircraft to supersonic cruise without afterburner , it can quickly reach the combat airspace .

      Fighter prospects

-47 is a kind of Soviet Russia, the fifth-generation fighter demonstrator , and in 1997 made its first flight . , which stunned the public , but the Russian military has been remarkably calm , do not have any reaction . Sukhoi talks with the Indian military also die a natural death . The Russian military said it could not meet the fighters after the air war in 2010 the demand . .

      No misunderstandings

Many people still did not understand before the Soviet -47 Why called S-37, and even some confusion Su -47, S-37, S-47 several numbers . In fact , the Soviet Union in the early -47 called S-37, "S" number is the Sukhoi fighter aircraft used in the development of the company 's R & D number , "S" said forward-swept wing aircraft . SU -47 is shaped after the number , corresponding to the English number "Su-47". Project ID number and the shape later , after the official number has nothing to do . Similar examples are SU -27 , the model aircraft R & D number is T-10, T said delta wing .