The prototype of the Jian-15 Haidongqing is a French Rafale fighter, which is an advanced multi-role fighter known as the fourth and a half generations.

Using the performance standards of the Rafale to design the J-15 Haidongqing is indeed a new challenge for China's aircraft designers.

Speaking from his heart, Yang Weiping did not expect Sanhang to come up with results and complete the finalization within two or three years.

As far as the current situation is concerned, if the Huaxia Air Force can assemble the J-10 Pengnia, J-11 Golden Eagle, and J-14 Raptor all of them, it will definitely be regarded as a first-class air force in the world today!

Lu Xiaopeng of the Fourth Voyage took the initiative to ask for participation in the development of the Jian-15 Haidongqing, and Yang Weiping of course gave his full support.

After the successful conclusion of the National Conference of Industry and Commerce Entrepreneurs, Yang Weiping deliberately took time to go to the former Fengtian Aircraft Factory (Shenfei), where the headquarters of the Third Aviation Industry Group is located.

The concurrent project enables the sharing of research results and technical data of the first, second, third and fourth airlines.

The J-10 Pengniao and J-11 Golden Eagle being developed by the Second Airlines, including the J-9 that has just been stopped by Director Yang, and the technical data of the three types of aircraft are open to the Third Airlines.

In the course of the "technical thoroughness" of the F14A Tomcat heavy carrier-based fighter, the Third Aviation Company, which already had the foundation of the Jian-7 and Jian-8 mature models, completed 45 topics, including the verification of the aircraft's strength calculation report, the calculation of the strength and stiffness of the wing, the analysis of the aircraft's combat performance, and the verification and calculation of aerodynamic characteristics, and carried out 12 tests of 650 high- and low-speed blowing tests.

A total of 64 tests were arranged, including air intake, aircraft resonance, seat ground ejection, and flight. Through these calculations and tests, on the one hand, I supplemented and checked the design technical data, and at the same time, I also learned and mastered the methods of the original design of F14A, and accumulated experience for myself.

Sanhang has spent three years "gnawing" the MiG-21, and is of course familiar with the copycat process. Nowadays, the imitation of the American F14A Tomcat is quite handy.

The development and design of the J-14 Raptor went very smoothly, but there were many problems in the J-15 Haidongqing.

In this case. Ye Zhengda, the general manager of the Third Airlines, did not "hang himself on a tree", but recombined the current technical and technical strength, and he arranged Gu Yifen, Lu Shijia, Xu Huafang and others to form a research team for the Jian-15 project. The delta wing of the J-15 Haidongqing was studied and tackled with the processing technology of the active integrated front wing.

In addition, Ye Zhengda instructed Wang Shounan, Wang Fulshou, Feng Zhongyue and other technical personnel to restart the research and design of high-altitude, high-speed, and high-penetration interceptors.

The prototype of the J-8 was completed as early as July 1969 and two were test-flighted. During the Ten Years of Turmoil. The development of the J-8 was not completely interrupted. It's just that in 1978, after Yang Weiping became the director of the Commission of Science, Technology and Industry for National Defense, he stopped the development of the J-8. It is said that the engine used by the Jian-8 plan is too poor, and it will be carried out when there is a better and more suitable engine.

For the aviation people of the three airlines, J-7 and J-8 are like children they conceived and born in October. If they really want to completely give up the development of Jian-7 and Jian-8, and like the new and hate the old to engage in Jian-14 and Jian-14, Ye Zhengda, Wang Shounan and others are really a little reluctant.

In particular, a large number of MiG-23, MiG-25, and MiG-29 wreckage were brought back from the Annan battlefield, which made them even more convinced that the J-7 and J-8 could be designed more perfectly.

After China's first high-thrust military turbofan engine WS10 Taihang achieved mass production, the low-thrust WS12 Taishan (technical model WS6-H1-1042) was also put into production. The medium-thrust WS9 Qinling (technical model WS6-H1-1088) is also being tested for prototypes.

If the J-7 and J-8 are equipped with WS9 Qinling engines and the HD79-A avionics system, Ye Zhengda believes that the three airlines will definitely be able to redesign the J-7 and J-8 to have better comprehensive performance.

Anyway, Director Yang has emphasized many times that scientific research units should have a lively brain and not be too dogmatic. Don't even pull it out like an abacus bead before you move it.

Based on this idea, Wang Shounan, Wang Fushou, Feng Zhongyue and others based on the WS9 Qinling engine, and at the same time launched the improvement and development project of the original Jian-7 and Jian-8.

In the process of improving the Jian-7 and Jian-8, the scientific research and technical personnel and technical workers of the Third Airlines have experienced the incomparable joy and happiness of the Jian-7 and Jian-8 in their makeover and rejuvenation.

Replacing the Jian-7 and Jian-8 with a strong and powerful heart can completely upgrade these two fighters, which have more than 10 years of technical reserves, into the world's first-class third-generation fighters. This sense of achievement, which can forever be recorded in the annals of China's aviation research, has always inspired all project team members such as Wang Shounan, Wang Fushou, and Feng Zhongyue to devote themselves to the work of technological innovation.

With the passage of time, Wang Shounan and others gradually felt shocked and proud of the superior performance of the WS9 Qinling engine with completely independent intellectual property rights in China.

The more they know about the WS9 Qinling engine, the more Wang Shounan is full of incomparably firm belief in the success of the improved version of the Jian-7.

Wang Shounan's design for the new J-7 is very bold.

The fuselage adopts a supersonic area law, beam type and semi-monocoque hybrid structure. Single vertical tail, differential horizontal tail, double ventral fins, full span leading edge flaps and trailing edge flaps. The wing, horizontal tail and vertical tail have a sweep angle of 42 degrees, and the large sweep angle side strip extends to the tail of the fuselage, and the front three-point landing gear.

The two side rib air intakes of the fuselage are arranged in order to improve maneuverability when flying at high angles of attack, and the air intakes are located in the lower part of the front fuselage and are slightly inclined outwards so that air can be delivered to the engine even when flying at high angles of attack. Due to the use of DSI inlet channel, compression and separation of the attached surface layer, the resistance is reduced, the radar reflected wave is reduced, and the auxiliary intake valve is not set up, the structural weight is greatly reduced, and the reliability is high.

High-strength titanium alloy is used as the structural material, the front fuselage is high-strength aluminum alloy, the rear fuselage and lifting ailerons are made of carbon fiber composite materials, and the weldable LL78 aluminum-lithium alloy (Y2013 aluminum-lithium alloy domestic model) is covered on the side. The nose fairing and nozzle fairing are carbon/carbon composites. The mounting joints of the components are made of LL78 aluminum-lithium alloy.

The leading edge flaps and trailing edge flaps of the full wingspan made of titanium alloy are automatically linked to the lifting ailerons, and all control surfaces are operated by fly-by-wire via hydraulic servos. 50% of the fuselage of the conventional semi-monocoque structure is made of carbon fiber composite materials. The landing gear and engine doors are made of carbon fiber composite.

The cantilevered vertical stabilizer and recessed rudder of carbon fiber composite have a honeycomb core construction. The tip of the vertical tail is a carbon/carbon composite. The rudder surface is hydraulically operated by fly-by-wire system. No auxiliary control surface.

The cockpit adopts an integral arc windshield and a blister-shaped cockpit cover, and is equipped with a domestic GM TS78 zero-zero ejection chair that imitates the GRU-7A ejection seat of the United States. The seat reclines 29°. A carbon nano-absorbing coating is applied to the hatch cover to reduce the reflective area of the cabin radar.

It is powered by a WS9 Qinling medium thrust engine produced by Changan Aero Engine Factory, with a maximum afterburner thrust of 8427daN and an intermediate thrust of 4952daN.

The avionics system uses the HD79-A standard system, and the weapon system uses a 23mm aircraft gun. The weapons that can be carried include close-range combat missiles, medium-range air-to-air missiles, laser-guided bombs, and ordinary aerial bombs and rockets.

The wingspan is 9.45 meters, the length is 14 meters, the height is 4.77 meters, the main wheel base is 2.54 meters, the front main wheel base is 4.94 meters, the normal take-off weight is 9100 kg, the maximum take-off weight is 12700 kg, the external capacity is 3800 kg, the fuel in the aircraft is 2500 liters, the maximum flight speed is Mach 1.8, the maximum range is 2700 kilometers, the combat radius is 1420 kilometers, and the limit overload is -3G ~ 8.5G.

After the first verification machine was manufactured, Wang Shounan tested all the components of the prototype one by one, and did not dare to have the slightest negligence.

After the overall test was completed, the next step was a more rigorous test flight.

Test flight is one of the most important and dangerous tests in the aircraft design process.

However, what Wang Shounan, Wang Fushou and others did not expect was that the first test flight was a complete success, and test pilot Yin Yuhuan was full of praise for this completely remodeled multi-role fighter-bomber. Many difficult maneuvers that were previously difficult to do can now be easily done.

The new J-7 can definitely be regarded as a third-generation multi-role light fighter!

Does our Huaxia Air Force really have a real third-generation fighter? Wang Shounan, Wang Fushou, Feng Zhongyue, and others obviously can't believe this fact.

A test flight does not mean success! Wang Shounan warned himself and all the personnel of the project team that it is necessary to continue the test, and only after the final shape can be determined, then report the good news to Director Yang of the Commission of Science, Technology and Industry for National Defense.

Out of the strict principle of the fighter design work, Wang Shounan did not even report the good news to Ye Zhengda, the general manager of the three airlines.

They continued to conduct repeated and various tests on this new J-7 demonstrator, and made appropriate improvements in some details.

The use of a large number of aluminum-lithium alloys, titanium alloys, and carbon fiber composite materials has enabled the new J-7 to have a maximum range of 3,500 kilometers after adding an 800-liter auxiliary fuel tank in the belly!

It is no wonder that Director Yang has always emphasized that the design of advanced fighters must be optimized based on mature advanced aero engines.

The design of the new Jian-7 is better than when they developed the Jian-7 and Jian-8, and I don't know how much trouble and how many detours have been saved.

In less than a year, a real third-generation light multi-role fighter was successfully developed, and such an efficiency made Wang Shounan and others feel that they were in an illusory dream.

Just when Wang Shounan had just reported the news of the successful development of the new Jian-7 to Ye Zhengda, the general manager of the Third Airlines, Yang Weiping came to the Third Airlines to inspect the work without any greetings.

Yang Weiping was very strange, why did the people of the Third Airlines never ask him anything about the development process of the Jian-15 Haidongqing?

Did they find a solution to the basic process? )