Chapter 853 If It Were Your Own

The information about the engine brought by Song Shijia has been highly valued by the large aircraft project team that has been in Beijing for a long time. Looking at the thick and well-preserved detailed information with a total of thousands of pages, the few remaining experts in aircraft engine research in China are excited.

It is with countless ordinary technical talents like Song Shijia who are highly responsible for the country and the nation that the soul of this unyielding nation is supported.

Through the relevant information brought by Song Shijia, everyone can almost quickly reconstruct the whole process of researching and operating the old engine. And they 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, they can transform it technically. Or add some designs that can improve its performance.

After receiving this exciting report, Fan Wubing also felt a little excited. After all, as the heart of a large aircraft, the research of aircraft engines is critical. Although the research and development of the engine was a copy of the Boeing jump engine, there were many technical innovations in it, especially in training the team. There are many experiences and insights, which are still very valuable intangible wealth now.

The emergence of Song Shijia and these materials has given everyone a glimmer of hope for the revival of the engine of domestic large aircraft.

For this reason, Fan Wubing specially organized relevant technical experts and technical personnel from various departments of the original old-used aircraft project who came to the company to report. A symposium was held, mainly to recall the development process of the old-used aircraft, and to consider where the development of today's large aircraft projects should start first, where is the breakthrough, and where can some new information be obtained as soon as possible to supplement it?

Song Shijia, a technician who personally experienced the development of the old Yun engine, said to everyone, "The old Yun is a scar in the history of China's aviation industry. There were many grievances about the old Yun in the past, and there are still many debates now. However, almost all the debates are just about the advantages and disadvantages of the product, but they cover up the more important technical capability issues. At that time, the General Civil Aviation Administration of China put forward opinions on the development of the old Yun aircraft, believing that there were still many major technical problems to be solved, such as the fatigue test of the whole aircraft that affects safety and economic performance has not been carried out, the performance of the aircraft must pass a large number of test flights before acceptance, the four major systems on the aircraft still lack test data, and some airborne equipment still has problems, etc. Whether it is advisable to continue to develop aircraft similar to the Boeing Boron level needs to be considered, so the country decided to stop the development of the old Yun aircraft.

But from the perspective of technical capability development, such an explanation is like saying that a baby who is just starting to learn to walk is not allowed to survive because it has not been finally proved whether he can walk well in the future."

The suspension of the Yun aircraft has made China lose its independent research platform, and having a product development platform can select, test and integrate various new technologies, driving the progress of related technical networks.

A complex product system like an airplane that requires tens of thousands of parts requires the integration of a large number of technologies, and each subsystem and even each single technology has its own specific properties and specific progress track.

The key issue is that if there is no application possibility that can only be provided by the terminal product, the development of upstream technology will lose the demand motivation.

Any technological progress is achieved by solving problems. If there is no need for application, there is no motivation to solve problems, and even the problem itself cannot be raised. When some people argue that China cannot make products such as airplanes and cars because the basic technology is not good, the actual problem is that if we do not develop products independently, who will work hard to develop the upstream technology required for the products?

On the contrary, if we develop products independently, even if we cannot master all the technologies for the time being, we can not only purchase them outsourced, but also inevitably generate the 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 motivation for the advancement 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, reducing the cost and uncertainty of having to start everything from scratch.

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

But this experiment helped American engineers understand why the overall design of the aircraft needs to exist. And how it changes with the change of the engine. When the Canying aircraft designed specifically for jet engines came out, the advantages of jet aircraft were immediately revealed.

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

Having technology does not necessarily mean that you can produce products, not to mention that others may not be able to sell top-level technology to you. This way is not feasible. Foreigners are more cautious about Chinese technology than thieves.

"Some people say that Yunjiu copied the American Boeing. I don't agree with this. Even Boeing itself has never said this." Song Shijia said to everyone, "For example, the layout of the engine, the former Soviet Union used the wing root type, the British Trident used the tail hanging type, and the American Boeing used the wing hanging type. Through technical analysis, Yunjiu rejected the Soviet wing root type layout, and then made a full-size wooden prototype with a one-to-one scale to conduct wind tunnel tests on the two layouts of tail hanging type and wing hanging type, and finally chose the wing hanging type. This layout later became the mainstream layout in the world. Not only did European and former Soviet aircraft also change to wing hanging layout, but new aircraft still use this layout. . Another example is the wing, the most important aerodynamic component of an aircraft. Yunjiu conducted wind tunnel tests on the Soviet, British and American airfoils available at the time, and finally chose the British airfoil, which made Yunjiu's airfoil better than Boeing's in aerodynamic performance. The most valuable thing is that the designers of Yunjiu originally grew up under the former Soviet Union's technical system, but they broke through the limitations of the traditional technical track in the process of developing Yunjiu, making Yunjiu the first domestically produced aircraft in my country designed according to British and American airworthiness regulations. "

The Yunjiu was discontinued, and the road of assembling foreign complete aircraft was not feasible, so it took the road of subcontracting parts production. It is said that this way, technology can be learned, the whole process can be followed, and the parts system can be cultivated. Thus, it has the ability to produce complete aircraft.

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 a scattered layout. It is impossible for any country to learn a full set of parts technology through subcontracting. In order to learn technology, it is necessary to continuously accept new parts work packages. Often when the previous subcontract has not recovered the cost on a large scale, it has to start accepting the next one, subcontracting.

When the international cooperation in whole-machine assembly and subcontracting production was futile, the joint venture project shifted from trunk to regional aircraft.

After the state promised to allocate 10 billion yuan in funding in 1992, the aviation industry department proposed a new plan, which was to seek cooperation with internationally renowned commercial aircraft companies and obtain foreign technical support to develop China's aircraft platform.

But after the Chinese side adopted the attitude of being willing to be a primary school student, the selected partner Airbus asked for higher and higher prices, and even charged technology transfer fees for every business negotiation. It was said that this was because they had to explain to the Chinese side how to build an aircraft. In the end, it was delayed for a long time and ended in vain. The 10 billion yuan funding was taken back by the state after part of it was spent.

In the years since the Yunji was discontinued, the development trend of China's civil aviation industry is that the project has become smaller and smaller (Yunji is a 3-seater, McDonnell Douglas is a 4-seater, McDonnell Douglas is a 4-seater), but the cost is getting higher and higher (Yunji's actual investment is 2, McDonnell Douglas's project is break-even, McDonnell Douglas has lost all its money, and the budget is 10 billion yuan).

"By giving up independent design and relying on foreign design, China's aviation industry has given up the development of high-end technical capabilities. In the process of cooperating to assemble foreign aircraft, Chinese companies can only learn partial manufacturing technology, but not the most important design technology. More importantly, doing so will hand over their own technical learning process to foreigners for control, and finally lose everything because of the other party's turn. If you understand these principles, you will understand why once you abandon independent design and rely on foreign design, China's civil aviation industry will fail one after another." Song Shijia finally said.

Everyone listened to Song Shijia's words very carefully, and they all understood that at this symposium, many old comrades who had worked on the purpose of transportation were full of complaints. It is a good thing to vent them at this time. At least it can let everyone understand one thing with painful experience. If you don't take the road of independent research, there is no future. Even if you imitate, you have to do it step by step, starting from the most subtle, otherwise you will not be able to achieve your goals.

Fan Wubing also has a deep understanding of this. Just like his cooperation project with Zhou Si, if he just worked for them, he would never learn to make chips. However, after he bought Motorola's bottom-end technology platform and obtained some technical information from other semiconductor manufacturing giants, he has made considerable achievements by developing his own low-end processors. Now, the computer chips used in the smart home appliances under Fan Investment Group are all products with independent intellectual property rights.

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