"Yun Fei, do you really want to invest in the Yanhuang engine of 810 Research Institute?" The next day, it was afternoon after Yunfei woke up. After lunch, Cheng and Ma Fengshan were waiting for Yunfei in Yunfei''s room with serious faces from time to time.


    In the morning, they had seen the test data of Yanhuang engine. The result was far from what they imagined.


    Even if China is about to succeed in this regard, it has not been completely successful.


    Stable results in ground tests do not mean that stable results can be obtained in high-altitude bench tests and flight tests. In particular, the original experimental data here made Ma Fengshan''s heart very heavy. High altitude bench test is not a flight test. During the two months of Yanhuang engine test here and the scrapped three samples, sudden flameout and other faults often occur.


    After they told Yunfei about these situations, they quietly waited for Yunfei''s decision.


    "In this way, it is difficult for Yanhuang engine to succeed in one year?" Yunfei''s face also became very ugly.


    "It''s not that you can''t succeed, it''s very difficult. After the high-altitude platform test, we have to go through a longer flight test. During the flight, the working environment of the engine is much more complex than that fixed on the high-altitude platform, and there will be more faults... "Cheng whispered with his teeth from time to time.


    ARJ-21 aircraft, like Yunshi aircraft, they plan to carry out only one prototype for static pressure test and the second prototype for flight test. After all, the aircraft structure calculation method summarized by Ma Fengshan is definitely the best calculation method in the world, and the sample cost can be reduced to the lowest.


    Hundreds of millions of funds can be saved here.


    But now it doesn''t work. The technical performance of the engine is not good. The long test of 10000 hours is just a cumulative time, not an engine that has been tested for such a long time.


    "Has the high-altitude platform test been completed in 1000 hours?" Yun Fei asked with his teeth clenched.


    "No, there are three in a row. The one with the longest test time is now. So far, it has been tested for 754 hours..." Cheng shook his head from time to time. If the 1000 hour high-altitude bench test can be completed, the engine performance will not change much, and they will not be so worried now.


    "What are the reasons for the scrapping of the first three?" If things really can''t be done, Yunfei must have a backup plan - to cooperate with the Ukrainians.


    "The main reason is that the blade is broken. Some technologies and process materials of turbofan 8 adopted by Yanhuang engine have also been improved. However, practice has proved that the improved design of these engines has not been successful. Perhaps it will be easier for them to build trunk airliner engines than this new low thrust engine, After all, there is the foundation of turbofan eight... "Ma Fengshan sighed.


    This is a hard injury to the whole of China.


    "Isn''t their impeller production process using integral high-temperature sintering and then integral forging?" Guocheng leaf factory is a factory specializing in producing this thing. Clouds don''t naturally know these things.


    "This process is adopted. According to the analysis, the main reason is that the pressure of forging equipment is not enough, coupled with the accuracy problem during machining. The four-axis machining in plant 132 realizes the function of the fifth axis through tooling, which is still slightly different from the real fifth axis..." Hou Mingrui, who just entered the door, said with an ugly face.


    The cloud was speechless.


    The biggest problem is not the material, but the accuracy of machining.


    Things go back to the five axis machining center again. How can Yunfei not be depressed?


    "How was turbofan 8 processed?" When I think that the original turbofan 8 has gone through 150 hours of airworthiness flight, why didn''t the original turbofan 8 encounter these problems, but now Yanhuang encountered them?


    "At that time, the impellers of turbofan 8 were processed by the former Soviet Union, rather than machining and subsequent surface treatment in our own country. After all, the former Soviet Union used special aircraft to produce these. Now Lao maozi produces engines and exports them to China. These are the equipment left by the former Soviet Union. Our plan in China at that time was that if the turbofan 8 was successful, we would put on a set of equipment specializing in the production of engine turbofans without obtaining a high-performance Machining Center... "Hou Mingrui explained to the people.


    The Soviet Union often used this special plane production method to produce these precision equipment.


    Because such a production line is specially designed and developed for the production of a product with very high precision requirements, it not only has high cost, but also does not have flexibility. After product adjustment, most of the whole production line is scrapped.


    That''s why the former Soviet Union was dragged down by an American space program. All the energy of the whole country has been invested in these high-precision and cutting-edge heavy industrial production. There has never been enough energy and material resources to invest in light industries related to people''s livelihood. As a result, they can build an international space station and even prepare to build a base on the moon, while their domestic people are living in a difficult life.


    After the old man came to power, his relations with the international community became better. Moreover, the whole country was already poor, and the international situation was not as complex as in the 1970s. Therefore, such a costly and inefficient mode of production naturally could not continue.


    Since then, China has been vigorously introducing CNC machine tools and CNC technology with lower production cost and higher production efficiency, rather than developing the special machine production mode that brought down the huge former Soviet Union.


    "How did European and American countries do it before the emergence of five axis machining center?" Yunfei was poisoned by the idea that the material was king.


    "The birth of CNC machine tools is due to the aviation industry. Moreover, after European and American countries have high-precision high-end CNC machine tools, the development of jet fighters and airliners began to grow faster and faster. Materials and manufacturing complement each other... "Huang qiaosong has a special say in this.


    Although the materials in China are much worse than those in foreign countries, there is still no problem in manufacturing the most basic aeroengine.


    "In that case, pay $150 million to 810 Research Institute. Director Hou, is there no problem with producing another batch of test samples with this money?" The five axis machining center of Jiuyi heavy industry will face the market soon. If there are still problems at that time, Yunfei will give up the project without hesitation.


    The loss is only 150 million.


    If you succeed, naturally, the benefits will be more.


    You should know that the quotation of Pratt Whitney''s engine equivalent to RMB has exceeded 13 million, while the sample production of Yanhuang engine is only 10 million. The production cost of mass production of these engines will be lower.


    "No problem, absolutely no problem." Hou Mingrui didn''t expect that Yunfei, a stingy guy in Huang Qiao''s mouth, was 150 million. You know, he thought that at the beginning, Yunfei would only give them tens of millions of funds


    "Cloud boy, how about the processing of these turbines, turbofan disks and blades in the experimental workshop of your 91 Research Institute? After all, your equipment is the best in the country, and the workers'' technology is basically the best... "Huang qiaosong is used to Yunfei''s advantage. As soon as he hears that he wants to re produce engine samples, if he gives these businesses to Yunfei, whether it is the test workshop of 91 Research Institute or xinkaixing, he can save tens of millions of processing costs.


    In particular, guochengyun is not a leaf factory with general equity. It is specialized in producing this thing.


    "No problem, but let''s talk about it first. One yard belongs to one yard. It''s impossible to say without research funds. Now that we have funds, we have to follow the market rules. Whether it''s the production and processing in the experimental workshop of our Jiuyi research institute or the xinkaixing impeller factory, the processing fee will be deducted directly from these research funds... "Yun Fei''s words immediately made Huang qiaosong like a fly, and the smile on his face immediately froze.


    Yunfei doesn''t care about his reaction, and he can''t always be a good man, can he?


    You can''t owe yourself, can you? The money is given anyway. If 810 research institute still does as factory 132 and 611 research institute do, it will be their own loss in the end.


    "Mr. Ma, let''s settle this matter. Anyway, it will take almost eight months for the final assembly of our ARJ-21. The first prototype used for static pressure experiment will be obtained first. If the domestic progress is not good at that time, let''s find a way again. We have in China. Even if it is worse, we will not lose our dignity. " After Huang qiaosong and Hou Mingrui left, Ma Fengshan, who was always gloomy, was about to say something. Yun Fei directly blocked his words.


    He really doesn''t want to be blackmailed by those foreigners anymore.


    "In the United States, you all see how those grandchildren treat us. All this is because we don''t have it at home. If Yunshi doesn''t fall, and turbofan 8 continues to invest in research, will we be discriminated against like that? Dare they treat us like that? Do we have the slightest dignity to speak in front of foreigners? " Yun Fei sighed. He just wanted to take a breath.


    "Dignity is earned by yourself, not bought with money!" Ma Fengshan and Cheng from time to time were deeply convinced of Yunfei''s statement.


    Ma Fengshan, in particular, has been in the United States for a long time.


    Even though many Americans admire him very much, they do not respect him, because even if he has the highest talent in the world, in the eyes of those Americans, this talent is useless.