J Ba's workshop began to get busy, and Qin Feng finally found an opportunity to chat with Tu Lao.

In the blink of an eye, Tu Lao has been here for a long time, and in order to work here, they even rented a house, if they live in a hotel all day, the price is too expensive, and they can't afford it at all.

Now, Tu Lao is also relatively happy with Qin Feng's arrival, and he said to Qin Feng: "What we are doing now is the preliminary preparation work for the Jian-7 CP, which is called a feasibility study. ”

In China, such work is rarely carried out, or has been carried out, but it has never been specifically studied, and this feasibility study is to determine whether the future work is feasible, if not, how to take measures to change, and so on.

"Among them, we are designed to divide the work in the future, which includes many aspects, such as technical, including aircraft structure, electrical energy, mechanical systems, avionics, propulsion systems and power plants, fuel, environmental control, cockpit, weapons, etc., which is one of them, after the completion of these technologies, there are test flights, such as arranging various ground tests, flight tests, and developing project organization work such as arranging various ground tests, flight tests, and developing project progress networks. Analyze the project cost and development expenses, control the reliability and maintenance of the aircraft, arrange comprehensive logistics support, personnel training, organize production and tooling preparation, etc. We've learned a lot from this. ”

This time, in addition to promoting the J-7 CP project, another important gain is to learn, how people began to study a new aircraft, it is very meaningful, in the future, when you are researching a new aircraft, you can also refer to this way.

Tu Lao gained a lot, of course, in these division of labor, the two sides were at loggerheads, talked a lot, at the beginning, Grumman accounted for 68% of the workload, Tu Lao of course disagreed, and after repeated consultations, finally, Grumman accounted for 54 percent, basically half of each.

"At the same time, we got to know a lot of people." Tu Lao said.

Working with these Grumman personnel, Tu Lao also gained a lot, and also met a lot of outstanding Western aircraft designers.

In the West, the development of a fighter is considered to be an overall credit, and it is rarely said about a certain person, for example, who is the chief designer of the F14 Tomcat? Definitely not famous, not as good as Sukhoi, Mikoyan these people, not even as old as Dassault, they are all unknown.

In fact, their professional standards are also very high.

Pelehack is in charge of the overall situation, and in specific aspects, Mr. Furth, who deals with him every day, is technically responsible, this is a powerful man, good at cooperating with foreign countries, and he has been engaged in the overall background in the past, and he has done the overall work of the F4 and "Gulfstream" aircraft.

The overall expert Kannonico is Pelehak's old partner, the two have worked together for 35 years, and the overall drawings of the aircraft are all in his hands, the aerodynamic expert Mr. Lu has also worked in Grumman for 20 years, and the structural expert Mr. Bell is very experienced in stress analysis and fatigue life, especially in the use of new materials.

When they came into contact, Tu Lao felt their technical attainments.

Tu Lao is a powerful person in the 132 factory, but many times, he feels that he is the leader alone, it is too hard, and he wants someone to help him share the burden.

After introducing these briefly, Tu Lao suddenly remembered something and said: "When we were analyzing the current project, we also made a major adjustment to the aerodynamic layout of our Jian-7 CP project. ”

Although when they were in China, they had almost made out the appearance, but here, in order to achieve a better technical level, they made some improvements, and this improvement was what Tu Lao was most excited about.

At the beginning, everyone's plan was to keep the rear fuselage of the J-7 unchanged, just to change the nose and change the air intake from the nose to the air intake on both sides, but now, because Pakistan already has the F-16, so no matter how it is changed, I want to compare it with the F-16.

As for Grumman's proposal to graft the F20 nose, it was quickly abandoned.

After all, this is not a change on the original J-7, but the production of a new fighter, so why do you have to hold on to the original body? No matter how you change it, you can't get rid of some of the performance problems brought about by the foundation of the J-7.

At that time, it was required to change on the basis of the J-7, that was to control the cost, and now many of their feasibility studies and analyses are aimed at the cost, if the cost can be controlled, and the performance can be improved, of course it can be tried.

Thinking of this, Tu Lao became excited.

"First of all, it is our wing, our original wing is definitely not suitable for the future sky, so we decided to abandon the original delta wing and use a 40-degree swept wing with edge strip wings, this wing, basically similar to the F-16, belongs to the truncated delta wing with a medium sweep angle, which can improve the maneuverability of medium altitude speed, and additional missile pylons can be installed on the wingtips to increase the number of air-to-air missiles that can be mounted. The landing gear, let's move it to the belly of the plane as well. ”

If you want to talk about this wing, it is definitely the advanced of the F-16, and now their plan is almost to copy this, so that the shotgun will be changed all of a sudden.

Qin Feng immediately remembered the experience of riding the F-16, imagining the white smoke of the vortex pulled out by the side strips, thinking about this beauty, he yearned for it.

If only the 132 factory itself, they would not dare to do this, after all, the change is too large, this is not the research room in the factory can be made, even if it is put in the 601 institute, I am afraid it is a big project, now backed by Grumman, this is still guaranteed.

Of course, if that's all there is, that's not enough.

"At the same time, we originally had air intakes on both sides, which, as you know, are not conducive to large angles of attack, so Grumman came up with a new solution."

"Is it belly intake?" Qin Feng asked, if this is the case, it is almost the same as the F-16.

Tu Lao shook his head: "No, we will transfer the air intakes on both sides downward, and at the same time, tilt 10 degrees to the inside to form our unique air intake, taking into account the various advantages of air intake on both sides and belly air intake, and we can also use the fuselage for precompression." ”

These are all big deals, they originally planned to change the J-7 CP, and they bought the nose data of the J-8 to use, but now, the plan given by others is bolder and more avant-garde, and the effect is definitely better!