The Shenyang J-11 (Jian-11) - China's version of the SU-27

The Shenyang J-11 (Jian-11) is a Chinese twin-engine air superiority fighter developed by Shenyang Aircraft Corporation. This fourth-generation aircraft was originally a license-built variant of the Russian Sukhoi Su-27SK, which was later modified and produced independently using domestically developed avionics and weapons.

History and Variants
Initially, China purchased a license from Russia in 1995 to produce 200 Su-27SKs. However, China canceled the license after assembling approximately 100 units due to the desire to use its own avionics and radar systems. This resulted in a fully locally developed variant, the J-11B.

Specifications

The initial variant (J-11A) used Russian components, while the modern variant (J-11B/BG) uses entirely domestic Chinese technology.
The following are the main technical specifications of the J-11 (based on the standard J-11B variant):
Physical Characteristics: Crew: 1 (or 2 for the J-11BS trainer/combat variant)
Maximum Takeoff Weight (MTOW): 33,000 kg

Combat Performance
Engine: 2 × Shenyang WS-10A Taihang turbofans (the J-11A variant uses the Russian Saturn AL-31F engine)
Maximum Speed: Mach 2.25 (approximately 2,500 km/h at altitude)
Combat Radius: 1,500 km without refueling in the air
Long Range (Ferry Distance): 3,530 km
Maximum Altitude: 19,000 meters (62,500 ft)
Rate of Climb: 300 m/s

Armament and Weapons
The J-11 has 10 hardpoints (hardpoints) on its fuselage and wings to carry a total weapons load of up to 8,000 kg, including:
Internal Cannon: 1 × 30 mm GSh-30-1 autocannon (with 150 rounds).
Air-to-Air Missiles:
J-11A: Russian R-77 (medium-range) and R-73 (short-range) missiles.
J-11B/BG: Chinese PL-12 or PL-15 (long-range active radar-guided) and PL-8 or PL-10 (short-range infrared) missiles.
Bombs & Rockets: Various types of laser- or satellite-guided smart bombs (KAB-500 or Chinese LT type) and unguided rocket launchers for ground attack.

Avionics and Radar

J-11B Radar: Uses a Chinese-made Type 1493 Pulse-Doppler radar capable of tracking up to 20 air targets simultaneously and engaging four of them simultaneously.
J-11BG Radar (Modernized): Uses a modern, advanced AESA (Active Electronically Scanned Array) radar that is resistant to electronic jamming and has a much wider detection range.
Optical System: Equipped with an electro-optical sensor (IRST) device in front of the cockpit to track enemy aircraft through engine heat without turning on the radar (silent mode).

The only country currently using the Shenyang J-11 fighter jet is China.
The estimated total number of Shenyang J-11 fighter jets currently in service with the Chinese military is between 300 and 440.

This fighter jet is not exported to other countries, and no other country plans to use it. This is due to several main reasons:
License Agreement with Russia: The J-11 was born from a license for a Russian-made aircraft, the Sukhoi Su-27SK. Under the initial agreement with Sukhoi, China was prohibited from exporting these Flanker-based imitation platforms to the international market to avoid direct competition with the indigenous Russian fighter jets.
Domestic Defense Priorities: The J-11 variants (primarily the J-11B and J-11D) were specifically designed to meet the air superiority requirements of the PLAAF and PLAAF.