The talent rescue plan was successfully launched, and Yang Hui didn't know how much he could gain in the end, and the only thing he could do now was to know the destiny of heaven as much as possible, and it would depend on the will of heaven to succeed or not.

But now there are more important things to do, the most important thing is the cooperation between Southwest Science and Industry and Northrop, not only to ensure that Southwest Science and Industry can get out of the whole body, but also to ensure that the other party is good to get together and disperse, all say that a day husband and wife hundred days, the current cooperation between Southwest Science and Industry and Northrop is also a full four years, how can it still be a little emotional.

And the most important point is that the current Southwest Science and Industry still needs to maintain tacit cooperation with Northrop on Embraer, so it can't be too stiff, which is not in the interests of both sides.

Standing up again, Yang Hui went to the other side again, and thought a lot along the way, and when he walked into the design building, he saw the existence of the Yankees more than once.

"Ryan, back from a vacation in the United States? The ergonomics of the digital cockpit system this time can all depend on you, don't let us down. ”

Even, Yang Hui can still greet these Yankees clinkerly, they are all people who have been together for four years, Yang Hui can know almost all the American experts, and he is also clear about the work they are engaged in, which also reminds Yang Hui to always remember that Southwest Science and Technology needs to cultivate enough people who can replace them.

And now whether there is a domestic technical backbone that can replace these Americans, Yang Hui does not dare to have a 100% guarantee, although since these Yankees have been involved in the work of Southwest Science and Industry, there have been deputies sent by Southwest Science and Industry to assist. But the Yankees were much more savvy than the Soviets, and there was certainly no such way as to teach them by hand. It can only be more or less a stealing of teachers.

"Mr. Yu, what is the progress of the detailed design of the new J on our side? Did Northrop play a trick on the development side? We need to do some preparation now. I always feel that something has been wrong recently, and I still need to implement everything that needs to be implemented as soon as possible, especially for those projects that rely heavily on Northrop. ”

Chief Engineer Yu is no longer the chief designer of the J-18, but as the technical adviser of the J-18, he still knows the development progress of the J-18, and now when he asks about the progress of the project, Chief Engineer Yu can also give Yang Hui an answer.

"Now the detailed structural design of the J-18 is being carried out, and the detailed aerodynamic data has come out three months ago, but because we are designing a twin-engine fighter for the first time, we still don't understand the structural design. Fortunately, with Northrop's help, there will be no big problems in the design of the main structure of our mid-fuselage. ”

The detailed aerodynamic design has been completed, which at least makes Yang Hui's heart breathe a sigh of relief, but here it is said that the main structure design of the fuselage is a little worried, the structural design can be said to be a very test of the design skills of the technology, good structural design can make the aircraft body as light as possible while also able to withstand large overloads, but also have a longer structural service life.

However, this kind of technology is piled up by continuous design, and it is absolutely impossible to achieve it overnight without rich experience accumulation. Even the current Southwest Science and Industry has only practiced a lot on the J-7 fighter, and it can be regarded as being able to understand the structural design of the single-engine fighter and achieve a good structural design.

But when it comes to the structural design of the twin-engine fighter, this is really not the strength of Southwest Science and Industry. You don't have any experience in manufacturing J-6, although J-6 is also a twin-engine fighter, but the installation position of the two engines used in J-6 is completely different from the structural design of the third-generation twin-engine fighter. In addition, the J-6 aircraft has only been produced in Southwest Science and Industry for the same period of time. However, he did not preside over the improvement of the design. Therefore, the experience of Southwest Science and Industry in twin-engine fighters should be regarded as the least among several domestic fighter development units.

In the current country. It must be admitted that the twin-engine fighter with the most experience in the development of the fighter must be in Fengtian. Not only have they been making various improvements to the Jian-6 in the early years, but they have also independently developed the Jian-8, not to mention whether the combat performance of these aircraft is good or not, and whether they meet the needs of the army. In fact, in terms of technology accumulation, these two aircraft have accumulated the most abundant experience in the development of twin-engine fighters in China for Fengtian.

The second is Hongdu's side, a family can change the Jianliu Demon into an attack aircraft, and the performance is good to the army, which fully reflects that Hongdu has accumulated a lot of experience through the strong five, which is also incomparable to the southwest science and industry; The 611 Institute in the back also has J-6, and has also designed J-9 with various schemes, and the design of the twin engine has also appeared many times; In the end, even Xifei has accumulated some experience through the development of flying leopards. Only Southwest Science and Industry has not experienced the development of any twin-engine fighter before this time.

Now when it comes to the fact that Southwest Science and Industry has no experience in developing twin-engine fighters, Yang Hui is not puzzled by this, history has come like this, and there is nothing to be embarrassed about.

"There is no experience in developing twin-engine machines, which is really a problem. So what is the progress of the development of the fuselage now? When will we be able to come up with a mature design, I'll look at the specific situation before I talk about other questions. ”

Of course, we must look at the specific situation first, which is a must, but the specific situation is not so optimistic.

"The specific situation is that our current fuselage development progress will probably be drawn in the fall of this year, which is the schedule we have come up with after we have summed it up with Northrop, and there should be no possibility of speeding up the progress yet, so"

When he heard the time point of "September", Yang Hui felt a little headache, he was going to break up with Northrop in June, how could he continue to wait until September, and how could some of the remaining fuselage structure design projects after Northrop withdrew the experts? What the hell is to be done?

The structural design of the fighter is not so simple, and the J-18 project must not be overweight, if the structural design is too heavy, it will definitely not work. Of course, if you are confident enough, you can punch holes in the wing spar of the aircraft like the Su-27, so as to reduce the weight of the aircraft, but in the final analysis, this method is still to make a fuss about the structural design, it is not an idea that Southwest Science and Industry can play.

"Okay, let's put that aside for now, are there any other technology projects that rely heavily on Northrop? For example, the progress of the DSI intake project that we are now cooperating with Northrop is all about, and we need to plan ahead now. ”

In the end, Yang Hui even bluntly said that he was worried about Northrop, but Chief Master Yu never cared about where Yang Hui came from, since he asked here, he answered according to the question asked.

"Other aspects are not too much, the airborne computer because of the country's previous support for the No. 10 project, so the digital airborne computer was launched early, so this does not have to be like when the YZ-1 verification machine was developed, when we could only look at Northrop's eyes, now it is completely different. As for the DSI intake project, not long ago I also got all the technical data, the intake duct bulge is designed according to the air intake required by our turbofan 12 engine, the new air intake can meet 110% of the air intake, these extra 10% air intake on the one hand for the future turbofan 12 engine air intake demand beyond the standard reserve, on the other hand, it is used to supply the airborne APU auxiliary power system. ”

The original worrying DSI air intake technology is actually the technology that you don't have to worry about at this time, which makes Yang Hui cry and laugh, but this is good, at least it is the first good news after returning to the head office, and he should be happy. (To be continued.) )