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Song Shijia brought about the Yun-10 engine information, has been set up a large aircraft project team attaches great importance to the shelf, looking at the thick sum of thousands of pages of well-preserved detailed information, the only few remaining domestic aircraft engine research experts are excited.

That is, relying on countless ordinary technical talents like Song Shijia who are highly responsible for the country and the nation, they have supported the soul of this unyielding nation.

Through the relevant information brought by Song Shijia, we can almost quickly reconstruct the complete process of developing the Yun-10 engine, and can judge the advantages and disadvantages of this engine from many details, and get the finished product in the shortest possible time, and then through continuous testing and adjustment, it can be technically transformed, or add some designs that can improve its performance.

After receiving this exciting report, Fan Wuxian also felt a little excited, after all, as the heart of a large aircraft, the research and development of aircraft engines is crucial, although the research and development of the Yun-10 is an imitation of the Boeing 707 engine, but there are also a lot of their own technological innovations, especially in the training team has a lot of experience and experience, and it is still a very valuable intangible wealth.

The appearance of Song Shijia and these materials has allowed everyone to see a ray of light for the reappearance of domestic large aircraft engines.

To this end, Fan Wuxian specially organized relevant technical experts and technical personnel from various departments who came to the company to report on the original Yun-10 project, and held a symposium, mainly to recall the development process of the Yun-10 aircraft in those years, and to consider where the development of today's large aircraft project should start, where is the breakthrough, and where can some new information be obtained as soon as possible to supplement it?

As a technician who has personally experienced the development of the Y-10 engine, Song Shijia said to everyone, "The Y-10 is a scar in the history of China's aviation industry. For Yun 10, there were many grievances and grievances in the past, and there are many arguments now. However, almost all of the debate revolves around the pros and cons of the product, and obscures the more important issue of technical capabilities. At that time, the Civil Aviation Administration of China put forward opinions on the development of the Y-10 aircraft, believing that there were still many major technical problems to be solved in the aircraft, such as the fatigue test of the whole aircraft that affected the safety and economic performance had not yet been carried out, the performance of the aircraft had to pass a large number of test flights before it could be accepted, the four major systems on board still lacked test data, and there were still problems with some airborne equipment, etc., and whether it was advisable to continue to develop an aircraft similar to the Boeing 707 level needed to be considered, so the state decided to stop the development of the Y-10 aircraft. But from the point of view of technical development, this explanation is like saying that a toddler is not allowed to survive because he has not yet been able to prove whether he will be able to walk in the future. ”

The cessation of the Y-10 project has deprived China of its independent research and development platform, while having a product development platform can select, test and integrate various new technologies and drive the progress of related technology networks.

Complex product systems such as aircraft, which require tens of thousands of components, need to integrate a large number of technologies, and each subsystem or even each individual technology has its own specific properties and specific progress tracks. The key problem is that without the application possibilities that can only be provided by the end product, the development of upstream technologies loses the demand momentum.

Any technological progress is achieved by solving problems, and if there is no need for application, there is no motivation to solve the problem, and even the problem itself cannot be raised. While some people argue that China can't make airplanes, automobiles and other products because the basic technology is not good, the real question is, if it does not develop products independently, who will strive to develop the upstream technology required for products?

On the other hand, if we develop our own products, even if we are not able to master all the technologies for the time being, we will not only be able to outsource them, but we will also be motivated to develop them. Since the end product is the application platform of upstream technology, if there is no product development platform, there is no progress momentum for the entire technology chain.

The existing product platform is conducive to the establishment of a new product development platform, not only because the development of any new product requires the accumulation of technical experience, but also because the old platform can help technicians quickly grasp what the concept and parameters of the new platform should be, reducing the cost and uncertainty of everything having to start from scratch.

For example, the first attempt by the United States to develop a jet aircraft was to mount a jet engine on the XP-59 aircraft, which originally used a propeller engine, and its performance was no better than that of a high-speed propeller aircraft.

But the experiment helped American engineers understand why the overall design of the aircraft needed to exist and how it changed by the change in engines, and when the XP-80 was designed specifically for jet engines, the advantages of jet aircraft were immediately apparent.

Although the new jet aircraft development platform is a revolutionary progress compared with the old propeller aircraft development platform, this revolutionary leapfrog process is continuous, because the knowledge and ability of technology can only be developed cumulatively, and if you just want to buy other people's ready-made technology, it is basically difficult to achieve the predetermined goals for a large system project such as a large aircraft project.

With technology, it does not necessarily mean that you can produce products, not to mention, people may not sell you top technology, at least from the perspective of decades of joint venture cooperation, this road is not feasible, foreigners in technology to guard against Chinese, more careful than thieves.

"Some people say that the Y-10 is a copy of the American Boeing, but I don't agree with that, and even Boeing itself has never said that." Song Shijia said to everyone, "For example, the layout of the engine, the former Soviet Union Tu 104 uses the wing root type, the British Trident uses the tail crane type, and the American Boeing 707 uses the wing crane type. Through technical analysis, the Y-10 rejected the Soviet-style wing root layout, and then made a one-to-one full-size wooden prototype to conduct wind tunnel tests on the tail crane and wing crane layouts, and finally chose the wing crane layout. This layout later became the mainstream layout in the world, and not only European and Soviet aircraft were also changed to wing crane layouts, but also newly developed aircraft still use this layout. Another example is the wing, the most important aerodynamic component of the aircraft, the Y-10 conducted wind tunnel tests on the Soviet, British and American airfoils that could be obtained at that time, and finally chose the British airfoil, resulting in the Y-10's airfoil superior to the Boeing 707 in aerodynamic performance. The most valuable thing is that the designers of the Y-10 originally grew up under the technical system of the former Soviet Union, but in the process of developing the Y-10, they broke through the limitations of the traditional technology track in one fell swoop, making the Y-10 the first domestic aircraft designed in accordance with the British and American airworthiness regulations. ”

Yun 10 project is off, the road of assembling foreign complete machines is not passable, so it is said that this can learn technology, go through the whole process, cultivate parts system, so as to have the production capacity of the whole machine.

The problem, however, is that the technology and component production are completely different from the overall design and system integration. In addition, Boeing and Airbus have very strict subcontract production control, and the layout is so fragmented that it is impossible for any country to learn the full set of component technology through subcontracting. In order to learn technology, it is necessary to constantly accept new component work packages, and often when the previous subcontract does not recover the cost on a large scale, it is necessary to start accepting the next subcontract.

When international cooperation in the assembly and subcontracting of production failed, the joint venture project shifted from the main line to the regional aircraft.

In 1992, after the state pledged to allocate 10 billion yuan, the aviation industry department proposed the 100-seat AE100 project, planning to develop China's aircraft platform by seeking cooperation with internationally renowned commercial aircraft companies and obtaining foreign technical support.

However, after the Chinese side adopted the attitude of being a schoolboy, the selected partner Airbus demanded higher and higher prices, and even charged a technology transfer fee for every time it was negotiated in business negotiations, it is said that it was because it wanted to explain to the Chinese side how to build the aircraft, but in the end it was delayed for a long time, and the 10 billion yuan appropriation was withdrawn by the state after spending part of it.

In the years since the Y-10 was launched, the development trend of China's civil aviation industry has been that the number of projects has become smaller and smaller (Y-10 is 187, McDonnell Douglas 82 is 147, McDonnell Douglas 90 is 150, AE100 is 100), but the cost is getting higher and higher (the actual investment of Y-10 is 540 million, McDonnell Douglas 82 project is flat, McDonnell Douglas 90 has no money, and AE100 has a budget of 10 billion).

"By abandoning independent design and relying on foreign design, China's aviation industry has given up on the development of high-end technical capabilities. In the process of cooperating in assembling foreign aircraft, Chinese companies can only learn local manufacturing technologies, but not the most important design technologies. More importantly, in doing so, you will hand over your own technical learning process to foreigners to control, and in the end, you will lose everything because of the other party's turnaround. Understanding these principles, it is easy to understand why China's civil aviation industry will fail one after another once it embarks on the path of abandoning independent design and relying on foreign design. Song Shijia finally said.

Song Shijia's words, everyone listened very carefully, and they all understood that at this symposium, many old comrades who had engaged in the Yun 10 project were full of complaints, and it was a good thing to vent it at this time, at least it was a good thing to let everyone understand with painful experience that if you don't take the road of independent research and development, there is no future, even if it is an imitation, you must start from the smallest details step by step, otherwise you will not be able to achieve your goals.

IN THIS REGARD, FAN WUXIAN IS ALSO DEEPLY EXPERIENCED, AS IF HE IS A COOPERATION PROJECT WITH INTEL, IF IT IS JUST FOR THEM TO WORK, IT WILL NEVER BE POSSIBLE TO LEARN TO MAKE CHIPS, BUT THROUGH HIS ACQUISITION OF MOTOROLA'S BOTTOM-END TECHNOLOGY PLATFORM, AND AFTER OBTAINING SOME TECHNICAL INFORMATION FROM OTHER SEMICONDUCTOR MANUFACTURING GIANTS, NOW THROUGH THE DEVELOPMENT OF ITS OWN LOW-END PROCESSOR, HAS MADE GREAT ACHIEVEMENTS, AND NOW FAN'S INVESTMENT GROUP'S SMART HOME APPLIANCES, THE COMPUTER CHIPS USED, They are all products with their own independent intellectual property rights.

No matter how good other people's things are, they are also other people's, and if you want to reach or exceed the technical level of others, you need to start from the lowest level of things to be able to build a complete industrial system.

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