Information on the motivations of Guan Qianjun brought by Song Shijia. It has been highly valued by the large aircraft project team, which has been shy from the north. Seeing that there are thousands of pages of well-preserved detailed information, the few remaining domestic experts in aircraft motivation research are thrilled.

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

Through the relevant materials brought by Song Shijia, everyone can almost quickly reconstruct the whole process of researching and transporting old motives that year. And can judge the pros and cons of this motivation 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 Wubing was also a little excited. After all, as the heart of a large aircraft, the research of aircraft motives is the most important thing. Even though Yun Xiyan used to imitate Boeing’s motives, it is here. There are also many of its own technological innovations, especially in the training of the team, which has a lot of experience and experience, which is still a very valuable intangible wealth.

The appearance of Song Shijia and these materials gave everyone a glimpse of the reappearance of the motivation of the domestically-made large aircraft.

For this reason, Fan Wuyi specially organized relevant technical experts and technical personnel of various departments who came to the company to report on the original transportation of the old project. A seminar was held, mainly to recall the development process of the old aircraft that year, and consider where the development of today's large aircraft project should start first, where is the breakthrough, and where can we obtain some new information to add it as soon as possible?

Song Shijia, a technician who has personally experienced the motive of transporting the old, said to everyone, “The transport of the old is a scar in the history of China's aviation industry. There have been many grievances and grievances about the transport of the old in the past, and now there are many disputes. However, almost all The controversy only revolved around the advantages and disadvantages of the product, but it concealed more important technical capabilities. At that time, the General Administration of Civil Aviation put forward opinions on the development of the old-fashioned aircraft and believed that the aircraft still had many major technical problems to be resolved. Among them, fatigue tests affecting safety and economic performance of the entire aircraft have not yet been carried out, aircraft performance has to pass a large number of test flights to be accepted, the four major systems on the aircraft still lack test data, and some on-board equipment still have problems, etc., continue to develop similar Boeing boron type Whether a level aircraft is desirable or not needs to be considered, so the country decided to stop the development of old aircraft.

But from the perspective of technological development, this explanation is like saying that a baby who has started to walk on the Internet is not allowed to survive because he has not finally proven whether he can walk vigorously in the future. "

The cessation of the purpose of transportation has caused China to lose its independent research platform. With a product development platform, it is possible to select, test, and integrate various new technologies to drive the advancement of related technology networks.

Complex product systems such as airplanes that require tens of thousands of parts and components need to integrate a large number of technologies. Each sub-system or even each individual technology has its own specific nature and specific progress track. The key problem is that if there is no application possibility that can only be provided by the end product, the development of upstream technology will lose the demand momentum.

Any technological progress is achieved by solving problems. If there is no need for applications, there will be no motivation to solve the problem, and even the problem itself cannot be raised. When some people argue that China’s inability to produce airplanes, automobiles, and other products is due to the inability of basic technology, the actual question is, if you don’t develop products on your own, who will work hard to develop the upstream technology required for the products?

On the contrary, if you develop your own products, even if you cannot master all the technologies for the time being, you can not only buy them out, but will inevitably generate motivation to develop these technologies. Since the terminal product is the application platform of the upstream technology, if there is no product development platform, there will be no driving force for the progress of 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 the concept and parameters of the new platform. Reduce the cost and uncertainty that everything must start from scratch.

For example, the first attempt by the United States to fly a jet plane was to install the jet motive on a Xiangyi-yue plane that originally used propeller motives. As a result, its performance was not better than that of a high-propeller plane.

But this experiment helped American engineers understand why the overall design of the aircraft needed to exist. And how to change due to the change of motivation, when the Canying aircraft designed specifically for jet motives came out, the advantages of jet aircraft were revealed.

Although the new jet aircraft operating platform is a revolutionary advancement compared with the old propeller aircraft operating platform, the process of this revolutionary leapfrogging is continuous. The reason is that technological knowledge and capabilities can only be cumulatively developed. If you just want to buy other people’s ready-made technology, it is basically difficult to achieve the predetermined goal for a huge system engineering such as a large aircraft project.

With technology, it does not necessarily mean that you can produce products. What's more, people may not even remember the top-level technology to sell from decades of joint ventures and cooperation. It is impossible to stop the road. Foreigners are more careful to guard against the Chinese than thieves.

"Some people say that luck is a copy of American Boeing. I don't agree with this. Even Boeing has never said that." Song Shijia said to everyone, "For example, the layout of motivation, the former Soviet Union map uses wing roots. The British Trident uses the tail-hanging style, while the American Boeing jumper uses the wing-hanging style. Through technical analysis, the transportation negated the Soviet-style wing-rooted layout, and then produced a one-to-one full-size wooden prototype of the tail-hanging style and wing. The two types of hanging layouts were tested in wind tunnels, and finally the wing crane layout was selected. This layout later became the mainstream layout in the world. Not only the aircrafts in Europe and the former Soviet Union were also changed to the wing crane layout, but the newly opened aircrafts are still This layout is used together. Another example is the wing, the most important aerodynamic component of the aircraft. Wind tunnel tests were carried out on the Soviet, British and American airfoils available at that time. Finally, the British airfoil was selected. As a result, the aerodynamic performance of the old airfoil is better than that of the Boeing Boom. The most valuable thing is that the designers of the transportation were originally developed under the technology system of the former Soviet Union, but they made a breakthrough in the process of good luck. The limitation of the traditional technology orbit has made it the first domestically-produced aircraft designed in accordance with the British and American airworthiness regulations."

The road to assembling foreign complete machines is not clear. It is said that the way of subcontracting production of parts is said to be able to learn technology, go through the whole process, and cultivate parts system. So as to have the production capacity of the whole machine.

But the problem is that processing technology and parts production are completely different from overall design and system integration. In addition, Boeing and Airbus have very strict control over subcontracting production, and the layout is scattered. It is impossible for any country to learn a full set of component technology through subcontracting. In order to learn technology, you must continue to accept new component work packages. Often when the previous subcontract has not been scaled up to recover the cost, you have to start accepting the next subcontract.

When the road of international cooperation in the assembly of complete aircraft and subcontracting production was of no avail, the joint venture and cooperation projects switched from the main line to the regional aircraft.

After the state promised to allocate 10 billion yuan in 1992, the aviation industry department proposed the old evil page, and Ji Zai sought to cooperate with internationally renowned commercial aircraft companies and obtained foreign technical support to develop China's aircraft platform.

However, after the Chinese side adopted the attitude of being willing to be a primary school student, the selected partner Airbus had higher and higher prices, and even charged technology transfer fees for each negotiation in business negotiations. It is said that the reason was to explain to China how to make In the end, the plane was dragged on for a long time, and the 10 billion yuan of appropriation was withdrawn by the state after a portion of it was spent.

In the years since the dismantlement of the old, the development trend of China's civil aviation industry is that the size of the project is getting smaller and smaller (the old is the blade seat, the McDonnell Douglas is four, and the McDonald is falling. The small is four or four. ), but the cost is getting higher and higher (the actual investment of the old and the old, the profit and loss of the McDonnell Douglas project are flat, the McDonnell Douglas is worthless, and the old budget is billions).

"Abandoning independent design to rely on foreign design, China's aviation industry has given up the exhibition of high-end technological capabilities. From the process of cooperating to assemble foreign aircraft, Chinese companies can only learn partial manufacturing technology, but they cannot learn the most important design technology. ~lightnovelpub.net~ More importantly, in doing so, you will hand over your own technical learning process to foreigners to control. In the end, you will lose all the games because of the opponent's turnaround. Understand these principles. You will understand why once On the road of abandoning independent design and relying on foreign design, China's civil aviation industry will fail one after another." Song Shijia finally said.

Everyone listened carefully to Song Shijia’s words, and they all understood that in this forum, many old comrades who had been in luck were full of complaints, but it was a good thing to vent at this time. The painful experience made everyone understand that there is no future if you do not follow the path of independent research.

Fan Wubing also has a deep understanding of this, just like his cooperation project with Zhou Division. If you only work for them, you will never learn to make chips, but through him, he bought Motorola's bottom-end technology. After acquiring some technical data from other semiconductor manufacturing giants, the platform has now achieved considerable success by developing its own low-end processors. Now the smart home appliances under the Fan Investment Group use computer chips. It is a product with its own independent intellectual property rights.

No matter how good other people's things are, they are also other people's. If you want to reach or pass other people's technical level, you need to start from the lowest level to build a complete industrial system building.