Chapter 446

That year, the air force decided to introduce various electronic equipment from Marconi Company to transform the J-7, following the pace of the world. However, after the deposit was paid, the air force did not want it.

At this time, these funds were about to be wasted. Therefore, the 6611 Research Institute at that time decided to go ahead and supply them exclusively for export. The m of the J-7 m means export. After export, the air force changed its mind and thought that this fighter was good. It equipped a batch of typical export to domestic sales, which were equipped by the air force itself, It was given the number of J-7 2m.

The J-7 2M and the exported J-7 m also use a large number of Western avionics equipment, and their combat effectiveness has been greatly improved. These electronic equipment were introduced in the early 1980s. Therefore, now this J-7 2m is exchanged, which can be disassembled and carefully studied by the technicians here.

If you can produce by yourself, you can copy it. If you can't produce by yourself, you can introduce it from abroad. This refitted fighter can give them great enlightenment, let them shorten the research and development time and satisfy the people of yezao.

As for the other J-7E, the biggest inspiration is its double delta wing and leading-edge maneuvering flap. The adoption of this airfoil greatly improves the maneuverability of the aircraft. Qin Guan said that it can be compared with the F-16 in close combat. This airfoil is the biggest contributor.

At the same time, an integral fuel tank is designed inside its wing, which greatly increases the fuel load, improves the combat radius of the fighter, and can be favored by foreign customers.

The avionics of J-7 2M and the airfoil design of J-7 e can certainly meet the technical level of this era, and then be improved quickly.

If we get the J-7 mg, its electronic equipment will be too advanced and not of great reference value.

Now, facing the two fighters that have completed the "transformation", Qin Guan is still very relaxed. Every time he enters the system, he starts to sneak. It's his own brain. He makes it like an outsider.

When Qin Guan thought of this, he thought it was really wonderful. If he was more open, everything would be solved. In reality, he had a beautiful, gentle and lovely wife and a bold, fierce and open Lisa in his brain. If he could accept it, what else would he be afraid of?

Besides, I've been a monk for a long time. In the brain world, it's YY. What are you afraid of?

Of course, this idea just flashed by. Qin Guan once again strengthened his faith. He could not cheat mentally. He had principles.

Wait, what else do you seem to have forgotten?

Aeroengine Turbine single crystal air-cooled blade!

I boasted for a long time in front of the Niu people. Now, the Niu people come for this.

It can be said that if it is proved that our side has this technology, then in order to obtain this technology, the improvement of nasby and the cooperation of other projects, our people will certainly not be a stumbling block. If it is proved that our side is bragging, our reputation in the world will be greatly reduced.

This problem has reached the point where it must be solved, and the solution could have been to go to the weapons cemetery and the weapons data cemetery.

But now, when you think about it, you are entangled by Lisa. Every time you add new mental strength, you will face new problems. In the future, you have to continue to upgrade the system. You don't know how much headache you have to have.

At the same time, Qin Guan can't say that he developed it himself. After all, if the most professional talents can do it, Qin Guan can name it, but he can't be the person in charge of this kind of project. Otherwise, the other party doesn't doubt it. Isn't that a fool?

Qin Guan, who was originally a worker in a tank factory, provided several good ideas. Then he copied a heavy truck and became the factory director. Because he had a vivid mind, he was promoted by his superiors to engage in import and export trade. These can be explained.

However, it would be nonsense to say that Qin Guan is still an expert in engine and an outstanding material expert.

For this project, one person must be pulled out. Who should we find?

A man came to Qin Guan's mind.

Academician Zhang Litong.

This is a lady. Her contribution in materials is written with the spirit that women are equal to men. Born in 38, she was admitted to the thermal processing Department of Beijing Institute of Aeronautics as her first volunteer in 56. In 58, she was transferred to the thermal processing Department of Northwest University of technology with the national department to study casting. In 61, she graduated from the Department of material science and engineering of Northwest University of technology.

She has been dealing with materials all her life. Her most recent outstanding contribution is that in 76, she successfully solved the problem of high-temperature deformation of corundum shell, which has plagued the production of Aviation Investment Casting for more than ten years, studied and developed the heat preservation shell process and low thermal stress melting and casting process, and produced the first no margin blade in Han country.

(for a brief explanation, the professional name, no allowance, corresponds to the blank with allowance. The blade is first precision cast. After the precision casting, it needs to be slightly larger and processed on the lathe. This is the meaning of allowance, while no allowance refers to the shape directly after the precision casting, without any reprocessing.)

Academician Zhang Litong's research is now closely combined with the Spey project. In history, in 1980, under the guidance of Zhang Litong's scientific research theory, China successfully cast the first batch of Spey low-pressure first-class non allowance hollow guide vanes with high precision and low roughness with Tongchuan Shangdian soil shell material for the first time.

The dimensional accuracy and internal quality of the newly cast blade are equivalent to that of the Spey engine blade of the internationally famous RORO engine company, and the surface roughness is slightly lower than that of the British blade.

This was also a breakthrough that was finally achieved when RORO company did not provide these production technologies and was forced to conduct research in China.

The "investment casting technology without allowance" presided over by Zhang Litong not only pushed the investment casting level of Han country to the international advanced level, but also laid a theoretical and technological foundation for the development of complex internal cavity blades and thin-walled complex integral components of new engine in Han country.

These blades are the front compressor blades, but now Qin Guan needs the rear turbine blades, which can scare people the most.

Increasing the turbine temperature is a direct way to increase the engine power, and the turbine temperature completely depends on the problem that the turbine blade can bear and the material of the turbine blade.

It's time to visit academician Zhang Litong.

As soon as possible, Qin Guan called Tu Lao and others. They looked at these fighters that had been "transformed" by Qin Guan. There were sparks in their eyes. After Qin Guan explained, they left.

Professional things should be done by professional people. They are just a guide.