In the middle 1970s, the PRC decided to make a fighter-bomber with variable-sweep wing. In June 1976, China's leading aircraft manufacturers, engineers were summoned to Beijing for a meeting, in order to speed up the work on the creation of a new aircraft. The meeting proposed the creation of a shock options available version of the aircraft J-8II, also began design work on the attack aircraft JH-7, which would become an analogue machine F-111, Su-24 and the "Tornado" (but this project was a fairly long-term ). Along with this was a project of the fighter-bomber, Q-6, which was decided to develop as a more promising.
It was in the middle of the 70's, China has bought abroad by 2 MiG-21M and MiG-23C, MiG-23BN and MiG-23U, and 10 cruise missiles, AS-5. The MiG-23 were purchased in Egypt. So Makar, China managed to get hold of the right to copy the modern aviation and rocketry. Of particular interest to the Chinese aviation industry was represented by a turbojet engine with afterburner (TRVD), installed on the Russian MiG-23. Directed their attention to the designers and the wing having a variable sweep. Translate this technical progress, it was decided in the plane Q-6.
Before the Chinese designers were tasked to create a combat aircraft with variable sweep wing, the main designer of the project was named Lu Xiaoping. By February 1979 the work on this project have been completed. Initially, the project was based on the basis of Russian MiG-23BN, but the Air Force and Navy aircraft from countries sought opportunities for active self-defense. On plane of mandatory required in order to install the radar, which in the ordinary version of the shock was not provided. After that, it was decided to take as a base MiG-23MS, using the avionics South American F-111 aircraft (most likely place was industrial espionage) adapted to the Q-6. First the size of the aircraft were close Russian fighter MiG-23MS, but the Chinese electrical industry's poorly managed by those with the minimization of the size of the equipment, because of its size fuselage of the fighter-bomber Q-6 approached the Russian frontline bomber Su-24.
The tail part of the fighter-bomber Q-6 repeated the tail of the MiG-23. With all of this, unlike the latter, the Chinese fighter had highly raised nose to improve visibility pilot and ventral air intake. Studies have showcased that side vozduhopoglotiteli will be ineffective and Q-6 is the first Chinese project, which was implemented podfyuzellyazhny air intake. The aircraft was to be installed Turbojet WS-6, which develops in the mode afterburner thrust 122.4 kN. The engine has been copied from the motor Russian MiG-23. Take-off weight of the aircraft was to be 14,500 kg., Combat load — 4500 kg. The radius of the combat actions was to be equated with 900 km. According to its main features Q-6 was set to override its own Russian counterpart.
Compared to the fighter-bomber Q-5, which was created based on the MiG-19, the new aircraft with an index of Q-6 was due to a more modern avionics. The plan, namely, to make the laser target designation system, radio altimeter based on a ring gyroscope, radar missile warning, as the system of rounding terrain. In the cockpit planned to mount a "modern flat panel displays." As radar plane planned to use the equivalent of the American system AN/APQ-110, which was applied to the F-111, but the Chinese copy the radar could not.
The main discrepancy for the Chinese aviation industry was the creation of a massive and reliable turbofan engine with afterburner. In 1983 was created the layout engine itself, received the title of WS-6G, his afterburner thrust equal to 138 kN, but the technical properties of the engine left much to be desired. Motor lifetime equated just only 50 hours. Then, the Chinese decided to copy the Russian engine R-29-300 (without afterburner thrust 85.1 kN at foraszhe — 125.5 kN). This work was commissioned Bureau of Plant number 410. The new engine was designated the WP-15. And this slider failed to fully meet the military and designers. This type of engine not subsequently was equipped none of the Chinese military aircraft, and she was deported to the development of a "technical reserve".
Creating Q-6 from the PRC sought extensive research on the study of foreign technologies. Namely, those relating to the merits of the highest level of automation tools and aircraft control system. In China developed wire control system (EDSU), unlike the engines this development was needed and then this system equipped with fighter-bombers JH-7. Either way, China has been able to master this technology even before deliveries from Russia Su-27 fighters.
Another very important task for Chinese engineers was to create a variable sweep wing. Technicians and engineers in KB Nanchane experiencing very severe difficulties in its development, because as a result of good design Q-6 aircraft from the MiG-23, they could not at one hundred percent copy steering gear and wing. And the weight and dimensions, made of the wing, 12% exceeded the weight and dimensions of the same element of MiG-23, reducing the payload of the fighter-bomber, fuel capacity and, as a consequence, the combat radius of the introduction of a fighter. Virtually been created only a "quasi-wing" with variable sweep.
At that time, China is considered the Soviet Union as of the 1st of their own worst enemies. Russian Alliance rather intensively increasing its defense on the Chinese border. In the Siberian military environment was deployed powerful air defense system, which represented a severe threat to China. In service with Russian air defense forces began to arrive complexes "Book" and the C-300. It was assumed that the low-altitude Q-6 will be more vulnerable to anti-aircraft fire, you can create a fighter-bomber JH-7. It was decided that the performance characteristics of the aircraft Q-6 can not meet the requirements, and major efforts have been thrown on the creation of JH-7 fixed-wing. The aircraft was due to arrive at the Air Force and the Chinese Navy. JH-7 aircraft had the smallest dimensions, carrying with all this more payload, range acts superior to the radius of the machine acts Q-6.
Despite this, after 8 years of doing development KB running Lu Xiaoping still managed to achieve some success and progress in the development of Q-6 at the end of the 80s was evident, there was a new version of Q-6B. This project was structurally improved sufficiently been worked variable sweep wing and the air intake. Single-seat version of the a
ircraft, it was decided to equip the engines WS-6, and the double WS-6G. But by the time the Chinese aviation industry have gained significant success for the project, while Q-6 has gone and the development was stopped. A successful test flight of the JH-7 has put an end to the development of Q-6.