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Sukhoi Su-27 Flanker fighter aicraft
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The Sukhoi Su-27 (NATO reporting name: Flanker) is a twin-engine fighter aircraft designed by the Russian Company Sukhoi. There are several related developments of the Su-27 design. The first 'Flanker-A' prototypes flew on May 20, 1977 and entered service as the 'Flanker-B' in 1984. The development of the Su-27 fighter plane was completed in the early 1980s, and the plane subsequently set more than 40 world records of altitude and take-off-speed. The Sukhoi Su-27 is in service not only in Russia but also in China and Vietnam. China also bought a license for the production of its own Su-27 fighters. Sukhoi in 1997 signed an estimated $180-million contract with Vietnam to supply six Su-27 (of which two Su-27SK and four Su-27UB).
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| Main Variants |
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Su-27P (Flanker-B) : Standard version but without air-to-ground weapons control system and wiring and assigned to Russian Air Defence Forces units.
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Su-27SK : Export version of Su-27, single seat.
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Su-27SKM : Single-seat multi role fighter for export. It is a derivative of the Su-27SK but includes upgrades such as advanced cockpit, more sophisticated self-defense electronic countermeasures (ECM) and an in-flight refuelling system.
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Su-27UBK : Export version Su-27UB, two seats.
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| Technical Data |
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| Design |
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The Su-27's basic design is aerodynamically similar to the MiG-29, but it is substantially larger. It is a very large aircraft, and to minimise its weight its structure has a high percentage of titanium (about 30%, more than any of its contemporaries). No composite materials were used. The swept wing blends into the fuselage at the leading edge extensions and is essentially a cropped delta (the delta wing with tips cropped for missile rails or ECM pods). The Su-27 is also an example of a tailed delta wing configuration, retaining conventional horizontal tailplanes, though it is not a true delta. It has two vertical tailfins outboard of the engines, supplemented by twofold-down ventral fins for additional lateral stability.
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| Avionic |
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The Su-27 is equipped with a Phazotron N001 Zhuk coherent pulse-Doppler radar with track-while-scan and look-down / shoot-down capability. The fighter also has an OLS-27 infrared search and track (IRST) system in the nose just forward of the cockpit with a 80–100 km range, which also incorporates a laser rangefinder. This system can be slaved to the radar, or used independently for "stealthy" attacks with infrared missiles (such as the R-73 and R-27T/ET). It also controls the cannon, providing greater accuracy than a radar sighting mode.
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| Propulsion |
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The Su-27SK is powered by two AL-31F turbofan engines, designed by the Lyulka Engine Design Bureau (NPO Saturn). Each engine has two air intakes: a primary wedge intake and a louvred auxiliary air intake. An Su-27 fitted with AL-41F1 engines being developed by NPO Saturn took its first flight in March 2004. The uprated engine provides a thrust of 145kN (33,000lb).
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| Armament |
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The Su-27 is armed with a single 30 mm Gryazev-Shipunov GSh-30-1 cannon in the starboard wingroot, and has up to 10 hardpoints for missiles and other weapons. Its standard missile armament for air-to-air combat is a mixe of Vympel R-73 (AA-11 Archer), Vympel R-27 (AA-10 'Alamo') weapons, the latter including extended range and IR guided models. More advanced Flanker variants (such as Su-30, -35, -37) may also carry Vympel R-77 (AA-12 Adder) missiles. Armament for air-to-ground missions include: 100kg, 250kg and 500kg freefall and retarded aerial bombs; 500kg incendiary devices; 25kg and 500kg RBK cluster bombs; and C-8, C-13 and C-25 unguided aerial missiles.
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| Specifications |
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Type
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Supersonic fighter aircraft
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Country user
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Angola, Belarus,China, Eritriea, Ethiopia, Indonesia,Kazakhstan,Russia, Syria, Ukraine,Uzbekistan, Vietnam.
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Country producer
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Russia
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Crew
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Engine
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2 × Saturn/Lyulka AL-31F turbofans
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Speed
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2,500 km/h maximum
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Range
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3,530 km maximum
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Weight
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30,450 kg takeoff
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Avionic
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Phazotron N001 Zhuk coherent pulse-Doppler radar , OLS-27 infrared search and track (IRST) system, laser rangefinder.
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Dimension
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Length: 21.9 m; Wing span:14.7 m; Height: 5.92 m
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