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Wu Zhonghua looked at Liang Yuan and studied the group of numbers written by Li Yuanling with great interest, and said: "Xiaoyuan, I heard that your grandmother Liao said that your physics foundation is the best in the basic subjects, if Xiaoyuan is admitted to the junior class, I don't plan to choose a major in aviation in the future." ”

Liang Yuan scratched his head and said: "I don't know, I heard my mother say that engaging in this industry requires lasting enthusiasm, interest alone is not enough, and I don't know how long my interest can last." ”

Liang Yuan thought to himself that I was interested in the finished engine, but I was not interested in the principle at all.

Wu Zhonghua said to Li Yuanling: "On the 7th of next month, the juvenile class of the University of Tokyo will take the exam, and this year the University of Tokyo itself did not use the papers of the national college entrance examination, and the difficulty may be slightly higher than in previous years. I asked Ma Tianyuan, who is in charge of admissions at the University of Tokyo, and among all the candidates this year, Xiaoyuan and a Shengjing candidate are the youngest, which is very advantageous. ”

Li Yuanling said: "I didn't have much hope, I told him at home that it was up to me to decide whether to take the test or not, and it didn't matter if my grades were not good, looking at his bitter face a few days ago, I thought I was going to give up, but I didn't expect to persevere." ”

Liang Yuanxin said that if it weren't for the purpose of influencing the direction of your research and development in the future, I would have gone back to Benxi to tease the two loli.

Wu Zhonghua said: "In the past few days, Lao Liao has been full of praise for Xiaoyuan's supplementary lessons, saying that Xiaoyuan is open-minded, sees problems comprehensively, and has a considerable jump in thinking. Anyway, Xiaoyuan is still young, and he can take the exam for three or four years. ”

Liang Yuangang wanted to say that he couldn't pass the exam this time, and he wouldn't try it for the time being next year, but the phone on Wu Zhonghua's desk rang. Wu Zhonghua picked up the phone and hummed a few times, then hung up the call. Then he said to Li Yuanling: "The phone call from Director Hong of Logistics said that the turbojet 13 developed by 909 was in the sky and was in the sky, and now the fuel in stock is not enough, so we can only transfer 200 tons." ”

Li Yuanling asked suspiciously: "Teacher, this kind of turbofan engine has been dismounted, why does 909 still have a turbojet research and development project?"

Wu Zhonghua just sighed and shook his head, but didn't say anything.

Liang Yuan thought to himself that the old man was really kind, and he still didn't have a word of complaint.

Liang Yuan, who has memories of his previous life, is very familiar with the wonderful engine of the turbojet 13, which is an upgraded version of the thrust of the R-11F-300 twin-rotor engine equipped with the MiG-21 in the 60s. What is intriguing is that this thing was launched in the year when Spey got off the horse, and Liang Yuan calculated the time, and next year the turbojet 13A type will pass the national verification. Now is the time for a high-altitude test drive.

It's a pity that the performance of the turbojet 13A is really rubbish, the helpless Shengjing 909 had to start developing the B type in 1991, and in 1996, the turbojet 13B engine took 2 months to carry out 10 high-altitude simulation tests, and then carried out 150 hours of long-term test tests, in August 1997, the test car was carried out in August 1997, and the first flight of the J-7FS was equipped on June 8, 1998. In 1999, it was listed as a key model by the military.

Liang Yuan was very puzzled when he saw this, and he was puzzled that this thing didn't seem to be a finished product, 10 times of high platform simulation, 150 hours of test run, which door is a long-term test, and then a detailed search of information found that the first overhaul period (Note 1) of the turbojet 13 design is 150 hours, which is simply a bastard and a bastard. With the technical level of the 70s, the first overhaul of 1800 hours of turbofan Spey in the warehouse grass, to the money to develop the 60s level of the first overhaul of the 150-hour turbojet engine, the engine research and development plan of the turtle has been NB breakthrough skyline.

Liang Yuan looked at Wu Zhonghua and shook his head, and decided to burn a small fire, so that Li Yuanling could have a good idea of the future.

Kabakaba also pretended to be curious and asked: "Grandpa Wu, my mother once told me that turbofan engines are more thrusty and fuel-efficient than turbojet engines used in airplanes, why doesn't the 909 Institute develop turbofan engines?"

Wu Zhonghua looked at the two of them looking at him curiously, and said with a wry smile: "That's a long way to say." ”

Li Yuanling hurriedly stood up and picked up the teapot, poured two cups of tea, handed Wu Zhonghua a cup and said, "Teacher said slowly, I haven't drunk this Longjing for many years, and I haven't graduated when I drank it last time." ”

Wu Zhonghua took the teacup and blew the rising heat, took a sip lightly and said: "The last time it was much more precious than this, it was the first time I went to see the prime minister after I was rehabilitated in 62 years, and the prime minister told me to work with peace of mind and be the vanguard of the aviation industry." Before leaving, the Prime Minister gave me the bag of tea. ”

Wu Zhonghua said with a look of reminiscence: "The start of the Spey engine project was in 1970, the prime minister first proposed to introduce, 72 years after the establishment of diplomatic relations between China and the United States, our relations with the West were basically normalized, so in 1973 Britain persuaded Batumi, promised to transfer Spey engine technology to China, but unfortunately at the time of the introduction, the central government had large internal differences, did not coordinate the relationship between all aspects, and the decision-making was repeated several times, and the decision was delayed for a long time. From 75 years to start preparing for trial production, until 79 years we made a total of 4 prototypes, the teacher rehabilitated for the second time after the work went to visit Sister Deng, Sister Deng said to me 2 months before the death of the prime minister, but also mentioned me and Spey engine project, said that in the future to find an opportunity to transfer Wu Zhonghua back to Beiping, Spey still has to let him do it. ”

Wu Zhonghua sighed again and continued: "After the official establishment of the localization of Spey, many people know that this project is the last wish of the prime minister, and even the life of the work is not wanted, it only took three years for the localization rate of Spey engines to reach 70%, after the initial success of localization, we sent three domestically produced Spey engines to Rolls-Royce in the United Kingdom for testing, and all three have reached the factory standards of Rolls-Royce. At that time, when the project team was preparing to make persistent efforts to further improve the level of localization, the state issued a document to cancel the localization project of Spey Engine due to the shift in the focus of economic work. The entire project team was disbanded. ”

"When we signed the technology introduction agreement, we promised that after the first batch of 50 Spey engines, we would purchase 50 Spey engine components in Rolls-Royce in the future, and as soon as the localization project was cancelled, this commitment was also yellow, because we unilaterally tore up the contract, and finally compensated Rolls-Royce 2 million pounds. When the project of Spey's localization was launched, it happened that the Navy wanted to introduce the British Type 42 destroyer, and the teacher promoted the project of Spey in order to continue to study Spey's core aircraft. ”

"As for the turbojet 13, it is a project launched by the 909 Institute in order to improve the power of the J-8 and J-7, and it can be said that the turbojet 13 is the development task assigned by the 901 Institute to the 909. At present, our engine research and development is affiliated with the main engine factory that produces the aircraft, and the engine research and development, capital flow, procurement, supply, etc. have to be arranged by the main engine factory, which is a small sub-project of the entire aircraft project. ”

"901 Institute is the largest aircraft manufacturing enterprise in China, Shengjing Aircraft Factory, mainly for the Air Force to develop and produce aircraft, the Air Force is currently equipped with J-5, six, seven, eight are Sheng Fei first made, the current country has been equipped with new J is also Sheng Fei a few years ago developed, so as long as 901 Sheng Fei has a project, as a 901 supporting 909 will have a project. ”

"Grandpa Wu, which aircraft is the Spey engine you developed for matching?" Liang Yuan asked knowingly as if he didn't know anything.

"Spey engine is the West Flying to the navy, the Air Force developed the universal J-7 (Note 2) power supporting project, but the J-7 project is very difficult, 79 years after the J-7 project was formally established into a quarrel, J-7 design to carry two pilots, the Air Force hopes that the cockpit adopts a parallel layout, and the Navy hopes that the cockpit adopts a tandem layout, this alone is enough to quarrel for three years. Wu Zhonghua stretched out three fingers and gestured.

It wasn't until after the Battle of Anglo-Argentine Island that the project team decided to use the navy's Jianyi as a tandem layout, but since then the Air Force has not paid attention to the J-7. ”

Liang Yuan heard that this is not the F35 version of the turtle, before the rice grain is engaged in the generalization of the F35 fighter, he must not have seen the process of the turtle to engage in the destruction of the bomb seven, otherwise he will not jump into the generalization of the big pit, anyway, the turtle is the navy and the air force are fighting, and the rice grain is the navy, the air force, and the marines are three melees, no wonder with the strength of the rice grain, the F35 has not been formally equipped for 16 or 7 years.

"The Air Force was very dissatisfied with the change of the J-7 flight cockpit to a tandem layout, believing that the J-7 with this layout could not meet the tactical requirements of the Air Force, and in the end, the development funds of the J-7 were all out of the Navy budget, and the entire project team was allocated 400 million funds. 400 million is not enough to even engage in the body, so in the case of 50 original Spey engines in stock, the project of localized Spey was cancelled. ”

Liang Yuan listened to Wu Zhonghua and thought to himself that Wu Lao was still a pure scientist, and he believed whatever he said.

The boss of the domestic aircraft manufacturing industry, Sheng Fei 901 Institute, has always regarded the production of military aircraft as his own home's own land, after the failure of Sheng Fei and Xifei to compete for the Jian-H 7, it is certain that the West Flying is not pleasing to the eye, the Air Force has been using Sheng Fei's aircraft since the founding of the People's Republic of China, and the relationship between the two sides has been entangled for thirty or forty years. The Air Force was disappointed with the J-7 and then gave up the J-7, and it would be strange if Sheng Fei did not fan the flames.

In the previous life, the 911 Institute of Chengdu Aircraft Factory, after getting the J-10 project in the cracks in the 80s, it was also suppressed within the aviation system and could not raise its head, the slogan of the Air Force and Sheng Fei was to 27, to more 27, so that the J-10 company that basically completed all the flight tests had no chance to equip the troops, until 386 had an inspection of the 911 Institute, and the then J-10 test pilot Tian Yuqiang put the J-10 in front of the BOSS Incomparable, 386 fell in love at first sight, after hearing that no one wanted J-10, he was furious, and after returning to Beijing, he gathered all the high-level air force to hold a meeting, it is said that the entire air force except for a few high-level leaders, was 386 miserable, and since then J-10 has soared into the sky and entered the sea.

After the J-11 soared into the sky, a very interesting thing happened to the Taihang engine that was matched with the J-10 and Su-27, after the 909 Institute took over the Taihang engine development project, the temperature of the core engine of the Taihang engine developed by the original China Gas Turbine Institute was pushed up from 1688K to 1750K at one time, and the core machine of the original design of the guide zhì was difficult to match the fan, and the performance was greatly reduced. Increasing the temperature by 62 degrees is equivalent to reducing the strength properties of the material to one-third of the original, and even exceeding the physical limit of the material. This kind of behavior that does not follow the laws of science and does what you want will eventually leads to a lot of problems after the Taihang is finalized, and the production type cannot be taken out for a long time.

The reason why the 909 Institute did this is also because in China's aviation industry, the engine industry has no status, a qiē funds, power is taken away by the main engine factory, the engine development unit can only look at the aircraft development plan, desperately squeeze in to get a little opportunity to have the opportunity to carry out scientific research, which means that the main engine factory must be compromised, completely from the other party's requirements to consider the modification of the program, rather than according to the current situation of technological development, and their own actual technical level to develop the engine program.

As for forcibly raising the temperature of the core machine to 62 degrees, was it instructed by 901?

Of course, the 909 Institute is not a good bird, and it may also be that it took the initiative to raise the temperature to show that it did not eat the old book on the basis of the research and development of the turbine institute, after all, the turtle is the most particular about carrying forward the past and forging ahead into the future. This kind of god-like bad debt is really not something that ordinary people can understand.

Wu Zhonghua looked at Li Yuanling and Liang Yuan, who were attentive, and let out a long sigh, and said with emotion: "In the teacher's heart, it is the secondary purpose of Sibei to provide power for the navy, or for the serialization of aero engines, and the most important thing is to figure out the core engine technology of the Guò gas turbine and understand the Spey engine. ”

"If you can thoroughly understand the core engine technology, in the future, when the country has money, you can enlarge the engine bypass ratio in a short period of time, increase or decrease the number of high and low pressure compressor stages, and you can expand a series of turbofan engines with medium thrust and below. It's a pity that there is also a problem with the navy at present, and the teacher has been running around all these years after all, but he still has the trust of the prime minister. ”

Note 1: The first overhaul period of the engine and the overhaul of the car XX million kilometers is a meaning, the overhaul needs to remove the entire engine on the aircraft, replace it with N new parts and then install it, after the completion of the next overhaul interval becomes half of the first time, in terms of the difficulty of loading and unloading the engine of the turtle, it takes about 10 hours to change an engine, and the overhauled engine has to be overhauled after 75 hours of use. It is admirable that the Turtle Air Force uses this kind of tattered to defend the country's airspace.

Note 2: The J-7 is the famous Flying Leopard fighter of HNA.

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