In the late seventies, why was it possible to get a drawing of the 707? In fact, at the very beginning of the development of the Yun-10 project, the US imperialists took note of the Yun-10 project, and if the United States wanted to win over the republic, it naturally had to show some sincerity.

The U.S. imperialists wanted to win over the republic, and at the same time found that the republics were copying their own 707 planes (PS: In the seventies, a 707 from Pakistan broke down and landed in Xinjiang, and later the 707 was transported to the magic capital, and everyone knows what to do. ）

In order to meet the needs of the United States and at the same time help Boeing win the civil aviation market of the Republic, Boeing sold the 707 drawings, and after many twists and turns, it was finally dismounted, leaving a sad aftermath.

However, the world only knows Yun Shi, but they do not know that another civil airliner of the same class as the 707 almost settled in the Republic, and in the early 80s, the Republic had another opportunity to manufacture an aircraft of the same class as the 707.

The United States used the cheap sale of 707 drawings to win over the republic, but in the end it did not come up with too many results and dismounted, and then became a cooperation with McDonnell Dalwellall as a McDonnell Hyperbenell assembly plant, but few people know that in fact, at this time the Soviets also tried.

At the height of the Cold War, in order to ease relations with the Republic and reduce pressure on the Eastern Front, the Soviet Union also proposed to provide all the technology of the Il-62 passenger plane free of charge, in the same way as the MiG-21 of that year.

Is it much easier to import Soviet technology in the process of localization? Isn't it easier? Is it possible to digest and absorb it like the MiG-21 in the future, and then change it into various other special aircraft?

But none of this is possible, it's all just a passing moment. Because in the eighties the country was oriented towards the West, naturally there was no interest in the Soviet Union. Working with McDonnell Douglas is the way to go

Now that there are drawings of 707 in China, some key parts rescued by Mr. Ma. Needless to say, now look for the road and stab it to the end.

Xifei's self-confidence lies in their manufacturing of large military aircraft, and MBB also agrees with Xifei's strength.

"This is something we are all happy to see, so we are discussing the new aircraft and how to divide the work between the two sides."

Speaking of the most important place, Xifei has vigorously promoted its excellent technology, in order to win as much share as possible, so that it can occupy enough voice in the future, and at the worst, both sides should occupy the same share.

"Of course. We need to divide the work according to the strengths of both parties, we think that it is no problem to complete the design of the whole airframe with our company's capabilities, you need to play more in the environmental control system, cabin interior layout, after-sales service and other key software. We believe that you are fully capable of completing these parts through the exercise of the Airbus partnership. ”

What Mr. Ma said is a fact, if Xifei wants to be used as the airplane body, the supporting factories of Xifei's integration of the H-6 can also be won, but it is only the airframe.

Civil airliners need more than just airframes, civil aircraft to transport people. Therefore, the requirements for all aspects are very high. Environmental control systems, avionics systems, aircraft interiors, auxiliary power systems, etc., as long as they are unique to passenger aircraft, cannot be provided in the Republic, for the simple reason that the Republic does not have a complete industrial chain for the production of passenger aircraft.

MBB is well aware of this. That's why they came to the republic, and only in this way can they guarantee MBB's own share and that MBB is indispensable for cooperation with new aircraft.

Flory agreed with Mr. Ma's words: "That's right. Xifei company is indeed better than our MBB company in terms of airframe design, so we have to cooperate. Our expertise can complement each other, which is the basis for cooperation. I completely agree that the airframe was designed by Xifei. We at MBB are only assisted in this. ”

Of course, there are still some things that Xifei and MBB are not good at, which requires external procurement or independent research and development, which requires coordination between both parties.

Yang Hui listened so much and knew that the cooperation between Xifei and MBB would not turn back, so Yang Hui needed to think about how to prepare the engine of the new aircraft.

Thinking of this, Yang Hui spoke: "After talking for so long, it is now certain that the two of you have no opinion on the cooperation of the new passenger aircraft, then I have to ask you what your plans are for the engine, and whether an aircraft will be sold well in the future depends on whether the engine is good." ”

Yang Hui's words pulled the two sides out of the excitement, the engine of the aircraft is definitely the top three subsystems in an aircraft, and everything else is virtual without a good engine.

Since the birth of the aircraft, the engine is a completely independent subsystem, and the development of the engine cannot be completed by the aircraft development manufacturer at the same time.

Yang Hui raised the problem of the engine, which naturally had to be solved: "So we need Mr. Yang, the Southwest Aviation Science and Industry United Company that you represent to join our new aircraft project." To be honest, there is no good engine in the world that is suitable for our new aircraft. ”

Yang Hui has been here for four days and has not spoken a word, which not only makes Xifei incomprehensible, but also the German side does not know what is going on.

Fortunately, Yang Hui finally spoke now, and as soon as he opened his mouth, he pointed directly at the engine, which shows that he is beginning to be excited about the new aircraft project. Vincent, an official sent by the Federal Republic of Germany, stood up to answer Yang Hui's words and invited Yang Hui to join the new aircraft project and contribute to the aircraft engine.

Listening to Vincent's words, Yang Hui agreed, from the talks between Xifei and MBB in the past few days, Yang Hui has a high understanding of what level of engine this aircraft needs, 70 to 80 seats of 3+2 cockpit layout, and it is in accordance with the body requirements of Westerners, but also to achieve a large seat space and comfortable ride.

Yang Hui can only say that it is so luxurious, according to the same design, the same cockpit width, with the shape of the Oriental, the seat arrangement is more compact, I am afraid that the 3+3 high-density cockpit layout can be done.

Such ambitions make Yang Hui have to reconsider, the thrust of the engine must not be less than 7 tons, I am afraid that the thrust of the CF34 engine of the General Motors is not enough, and the CF34 is the development model CF34-8C5 in the 90s can be regarded as barely enough.

If it can really be used, it must be an engine of this level CF34-10A, that is, the engine used in the later ARJ21 passenger aircraft, with a thrust of 8 tons.

The seven- and eight-ton commercial engines were not absent in the 80s, and the old-fashioned Pratt & Whitney JT-8D was an eight-ton class, but as a thing of the same age as the Spey 512 engine, the performance was really worrisome.

Although the old engine in the eighties and sixties is said to be a turbofan, the channel ratio is only a few tenths of a tenth, and the channel ratio of the military turbofan engine is no different, under the same thrust, the fuel consumption rate is more than double that of the high channel than the engine.

This is also the reason why Vincent said that there is no suitable engine for new aircraft, when all aircraft generally used super-large channel ratio engines in the eighties, your aircraft used engines from the sixties, are you sorry to go out?

Fuel consumption is so high, which airline is willing to want this kind of thing, civil aircraft are to make a profit, this is a pure market behavior, what is the use of people who can't make money?

That is to say, what needs to be developed this time is a high channel ratio engine, which requires a large diameter fan, and now let the base develop a high channel ratio civilian engine, needless to say, it is absolutely impossible, and Yang Hui will not be able to develop a large diameter fan with the base in a few years.

It seems that the new engine still needs to find foreign aid, and I am afraid that something like a fan will have to find a Western aircraft engine developer with excellent technical capabilities.

At this time, Yang Hui remembered a company with very good technology: German MTU, a strong company in the research and development and manufacturing of aero engine parts. (To be continued......)