"First time on the horse?"

The surrounding audience was stunned.

Although this period of history is not far away, it is not known to everyone, which arouses their curiosity even more.

Lin Chao waved his hand and said:

In 1966, the drawing design of the 910 engine matched with the J-9 was completed, and the prototype was trial-produced by the 602 Institute at the beginning of that year. The development of the 205 fighter radar and the Thunderbolt-4 air-to-air missile has also begun. But just when everyone thought it was smooth sailing, there was bad news. After wind tunnel tests, it was found that the maneuverability of the J-9IV scheme was not ideal.

As a result, the design institute proposed a tailless delta wing scheme, that is, the V scheme. However, this design brings more troubles, such as difficult handling, the stiffness of the aircraft's lifting ailerons, and so on. By June 1968, experts had found it too difficult to solve these problems. In addition, domestic production has been affected by the movement and can no longer operate normally, and the V plan is really unable to continue. As a result, the Sixth Academy stopped the J-9 project, which was its first dismount. ”

"Hey!"

A voice of regret rang out all around.

When Lin Chao was talking, there were pictures projected on the wall.

Even if those designs are put in a few decades, they are not outdated, and it is a pity to get off the horse.

Lin Chao said again:

"At this time, the international situation has changed drastically. In order to cope with the military pressure of Soviet Russia, Huaxia accelerated the development of military equipment. In 1968, the initial commissioning of the 910 engine for the J-9 was completed, and the manufacturing work was completed the following year. In February 1969, the 601 Institute decided to draw part of its strength to continue the development of the J-9 aircraft. In July of the same year, the central government established a leading group for the aviation industry. In August, an aviation industry conference was held, at which it was decided to develop the J-9 fighter as soon as possible. In October, the leading group of the aviation industry decided that the J-9 would adopt air intake on both sides and the normal layout of the delta wing scheme, that is, the original IV scheme. They demanded that the new aircraft be in the sky by the end of 71 and, if possible, in advance.

With the deterioration of the situation, Huaxia also began the construction of the third-line project. The Sixth Academy requested that the site of the original 13 Aviation School in Chengdu be used as the third-line address of 601 and 606. In February 70, the Military Commission approved the establishment of the 601 branch in Chengdu, which is the familiar 611 office. It can be said that without the J-9 project, there would be no existence.

At this time, the Air Force put forward requirements for the J-9, with an active radius of 900-1000 kilometers, a weight of 13 tons, an overload of 8, a ceiling of 25000, and a flight Mach number of 2.5. That is, the later Double 25 Plan. In order to achieve this goal, the design institute carried out a lot of demonstrations, and finally focused on the tailless delta wing plus the front wing and belly air intake, in addition to estimating the optimization, but also rushed to produce two sets of wind tunnel test models, high-speed and low-speed. After a lot of experiments, the canard layout was finally chosen, with air intake on both sides, which is the J-9VI-I scheme.

The design institute just breathed a sigh of relief, and the Air Force once again put forward a request, Double 25 is too small, Double 28 is too high, it should be Double 26, that is, the maximum use of Mach number 2.6, the static ceiling of 26 kilometers, and the maximum use of the watch speed of 1,300 kilometers per hour, this is the Double 26 plan.

In order to meet this requirement, the original layout can no longer meet the needs, the design institute had to redesign the shape, and the J-9 began to evolve into a double-engine and double-vertical tail layout, which is called the J-9VI-II.

However, the level of science and technology in China is not well developed. Although the experts have been improving these programs, they are still unable to meet the target requirements. At this time, the development of the engine also stagnated, and in April 1972, the Sixth Academy decided to suspend the development of the J-9, requiring the 611 Institute to turn to the research of fighter-bombers or trainers, which was the second discontinuation of the J-9 project.

Of course, this was a bombshell, which shocked everyone in the 611 Institute, and they didn't understand why they were carrying out such a surprise attack. To this end, someone wrote a report to Prime Minister Enlai, Vice Chairman Jianying. The two leaders gave instructions respectively, and Prime Minister Enlai asked the Air Force Command to find 611 institutes for research and research. Vice Chairman Jianying asked the Third Machinery Department to study and study.

After talking to the main cadres of the 611 Institute, the Air Force proposed that the performance of the J-9 must reach the double 25, and the Air Force should not want it if it is lower than this standard. As a result, the 611 Institute once again submitted the J-9 development plan.

In 1974, the Third Aircraft Department held a J-9 demonstration meeting, and adjusted the main design indicators for the fourth time. It was decided to fly the Mach number at 2.4-2.5, and the ceiling to 23-24 km. In November of the same year, the Third Aircraft Department held a review meeting on the J-9 aircraft program in Jinhuai, and decided that the 611 Institute and the 132 Factory would continue to develop the J-9. This is the third launch of the J-9.

In January 1975, the Third Aircraft Department reported to the State Council and the Military Commission, hoping to make appropriate adjustments to the J-9 indicators, that is, the maximum Mach number of 2.5-2.6, the ceiling of 23,000 meters, and so on.

On February 18, with the intervention of Comrade Xiaoping, this request was agreed.

On 23 December, the State Development Planning Commission and the National Defense Office of the State Council approved the development and implementation plan for the Jian-9 aircraft submitted by the Ministry of the Third Aircraft, and agreed to make five of them in batches, the first one in 1980, and the design finalized in 1983.

At the beginning of 1976, on the basis of the J-9VI-I scheme, the 611 Institute adjusted the overall aerodynamic layout and design parameters, and finally formed the J-9VI-III scheme. The machine maintains the original canard layout and adopts air intake on both sides.

But just when the work was in full swing, the 611 Institute suddenly received an order, due to the adjustment of the project of the research and development unit, the J-9 project was discontinued, and the data was filed. This is the third dismount of the J-9, and unlike before, the project was completely terminated. The development of the turbofan-6 engine, the 205 fighter radar, and the Thunderbolt-4 air-to-air missile has also been gradually stopped. ”

At this time, someone asked puzzledly:

"Director Lin, why is this happening, aren't they all going well?"

Lin Chao smiled bitterly and said:

"After the reform and opening up, Huaxia came into contact with Western technology and equipment. For example, the Air Force has flown advanced fighter jets such as the F-16 and Mirage 2000. After the comparison, he found that his own technology was backward, so he turned his focus to the introduction. ”

But at this time, Soviet Russia in the north collapsed with a bang. Western countries, which had no main rivals, immediately changed their positive attitude and imposed a technological blockade on China. Not to mention military equipment, even civilian equipment is prohibited. In such a situation, we can only pick up what is discarded.

The road to self-reliance is never easy. There are not only external influences, but also internal resistance. In particular, the Air Force, although it has not been bought into advanced fighters from the West. But they were impressed by the contact with Soviet Russian fighters, especially the SU-27. In this regard, there is an idea in the Air Force to buy aircraft, buy a large number of SU-27 fighters.

Leaders who know very well that they cannot buy military modernization certainly know the consequences of doing so. When he learned that the 611 Institute continued to develop a new type of combat timer, he immediately gave his support. But at this time, some people demanded that the development of this model be stopped and the focus should be shifted to the purchase of Soviet-style fighters! ”