Weight data: empty weight 16,000 kg, normal takeoff weight 22,500 kg, maximum takeoff weight 30,000 kg.
Performance data: Maximum level flight speed M2.35 (2,500 km/h), maximum speed at sea level M1.1 (1,345 km/h), ceiling 18,000 meters, climb rate at sea level: 305 meters/second, range 4,000 kilometers.
Weaponry: one 30mm gun at the root of the right sidebar, 149 rounds of ammunition, ****10 external mounting points, max. cargo capacity 6000kg.
Powerplant: two twin-shaft AL-31F turbofan engines of Liulica Design Bureau, static thrust 2*77 kN, accelerated thrust 2*122.6 kN.
It is the J-11B that is China's independently developed, upgraded and improved Su-27SK fighter. Details of China's J-11B heavy fighter jet have recently been revealed, and it is believed that the modified aircraft has an increased airframe life of 10,000 hours over the original Su-27SK fighter jet, and that the aircraft's empty weight has been reduced by about 700 kilograms due to the extensive use of composite materials, and that the radar of the J-11B is more powerful than that of the J-10 aircraft's 1473 radar, and it is estimated to be able to simultaneously detect 20 targets and attack six of them at the same time. The Su-27SK is only capable of attacking 2 targets simultaneously. Since the avionics equipment has been changed to domestic standard equipment, the J-11B can use a full range of domestic precision-guided weapons and has strong ground attack capability. The J-11B has become the most powerful model in the Su-27 family.