1. 蘇-27戰(zhàn)斗機， developed by the Soviet Union, is a type of heavy fighter aircraft. With a length of 21.935 meters, a wingspan of 14.7 meters, and a height of 5.932 meters, it has a maximum takeoff weight of 29,000 kilograms. The aircraft is powered by two turbofan engines, each providing 12,500 kilograms of thrust, resulting in a total thrust of 25,000 kilograms. Its maximum flight speed reaches 2.35 Mach, and its combat radius is 1,500 kilometers. The primary missions of the Su-27 include air defense, escort, and maritime patrol, making it a mainstay fighter of the Soviet Air Force. The NATO alliance assigned the nickname "Flanker" to this aircraft. The development of the Su-27 began in 1969, with the first flight taking place on May 20, 1977. It entered large-scale production in 1979 and entered service with the military in 1985.