As the deputy general manager in charge of production of Tianfeng Technology Company, Sun Kang also attended the meeting, and when he heard the speech of the airworthiness representative, Sun Kang glanced at Li Tianfeng, and Sun Kang's eyes were obviously full of worry.

Sun Kang's worries were not unreasonable, he could only use one of them, but the problem was still not solved, and the assembly of the third prototype could not be without any of the blades.

Li Tianfeng's face was not shocked, and after looking around the entire conference room, Li Tianfeng said, "Representative Chen, what is your opinion?" ”

Chen Dong, as the representative of Tianfeng Technology Company's general army in the factory and the deputy director of the nonconforming product review committee, has a lot to say.

Chen Dongdao: "Mr. Li, I don't have any opinions for the time being, the key is to take a look at the opinions of the design department, such out-of-tolerance blades, after installing the engine, will have an impact on the performance and safety of the engine." ”

Another military representative also said: "My opinion is similar to Mr. Chen's, as long as there is no impact on the performance and safety of the engine, I will naturally agree to use it." ”

As the chief designer of the turbofan 16 engine, Sun Xiaoping knew that he had to speak, so Sun Xiaoping said: "The overall situation of these two blades is relatively good, the material structure and performance are qualified, and the blade size is also fully qualified. ”

The airworthiness representative who spoke just now said: "Mr. Sun, even if the impact is very small, but it also has a certain impact, I think, re-feeding, the production of a batch of qualified turbine guide blades and then installation." This is the best scenario. ”

This is naturally the best, but it is too late in time, and it will waste at least half a month's time, Li Tianfeng patted his chest and promised Mr. Lin of AVIC that in the second half of this year, the turbofan 16 engine will be delivered in batches.

The more time is wasted. The delivery of the engine will be delayed, and if it drags on for a long time, it may not be possible to deliver the engine normally according to the node requirements.

Li Tianfeng said to the objecting airworthiness representative: "Representative Sun, how can you say that these two blades can be repaired and finally meet the design size requirements? ”

The airworthiness representative, that is, Representative Sun, immediately nodded and said, "If it can be repaired." In the end, the design size requirements are met, and I naturally agree to use it, but can the size of this part be repaired? I don't think so. ”

Li Tianfeng smiled and said: "Mr. Zeng, you are the chief craftsman of our company, you can tell me whether these two blades can be repaired." ”

Zeng Qinghai stood up and said: "These two blades can naturally be repaired, through the method of chrome plating. The chrome plating in this out-of-tolerance area can finally meet the final design size requirements. ”

Representative Sun said: "Is it chrome? I don't think so. As soon as the blade is chrome-plated, the entire blade will be plated with a layer of chromium, and the entire blade will be covered with a chromium layer, and the blade will be completely wasted. ”

Li Tianfeng smiled, Zeng Qinghai also smiled, Zeng Qinghai explained: "Representative Sun." There is a special process method that can shield the parts that do not need chrome plating, and only accurately chrome plating the parts that need chrome plating. ”

Representative Sun said: "Is there such a process? ”

Zeng Qinghai said confidently: "Of course, I have full confidence in the method of chrome plating to repair the out-of-tolerance parts of these two blades, and finally meet the design size requirements." ”

Chen Dong said happily: "It would be best if it could be repaired." I agree with this plan. ”

The rest of the participants also agreed, and Deputy Sun finally said: "In this case, I also agree." ”

Li Tianfeng clapped his hands and said: "Then it's decided, the two turbine guide vanes will be chrome-plated and repaired, and then installed on our third prototype." ”

As soon as Li Tianfeng said this, the matter was settled, and the matter of the turbine guide blades was solved, only a few days later, when the two blades were repaired, the missing compressor spacer rings and turbine bolts were processed, and the assembly of the third prototype could be carried out immediately.

The assembly of the second prototype began, on the same day, and two days later, the final assembly began.

The final assembly of this engine is also relatively smooth, after all, the final assembly workers are more and more familiar with the turbofan 16 engine, and the assembly is becoming more and more skilled, and in just two days, this engine has been fully assembled.

This is the second prototype of Tianfeng Technology Company, which is mainly used for field test flight verification, and after the engine assembly is completed and the inspection is correct, it will be transported to the test engineering center for in-plant testing.

The so-called factory test is mainly for the purpose of running in the engine parts, inspecting the working conditions and assembly quality of the accessories, as well as the technical conditions, also known as the run-in test, the preliminary operation test or the submission of the test.

This turbofan 16 engine will be used for field test flight verification, naturally must be tested qualified, if even the test car is not qualified, directly sent to the field to be loaded on the aircraft test flight, then it will be out of the ocean.

This is the second prototype of Tianfeng Technology Company, after the final assembly is completed, it was sent to the test engineering center for factory test, such a test did not take long, on the day of the engine sent away for testing, the third prototype was finally assembled.

The repair of the two turbine guide vanes was perfect, with an out-of-tolerance size of 25±0.05, which was basically in the middle of the range, and the missing compressor spacer rings and turbine bolts were also machined in just a few days.

The spare parts of the third prototype were finally complete, because the preliminary assembly of the components had already begun, and as soon as the missing parts were in place, the final assembly of the engine could begin.

The final assembly of the third engine also took only two days, very smooth, the assembly was completed, and it was also sent to the test engineering center for factory test, to Li Tianfeng's relief, the test of these two engines was good.

The two prototypes, which were commissioned smoothly, were only to be sent to the aircraft factory and then loaded onto the aircraft. This was followed by field test flight verification.

In the office.

Li Tianfeng was talking on the phone with COMAC, and Li Tianfeng said: "Mr. Ma, according to our agreement, the two turbofan 16 prototypes have completed our factory test run, and they can be sent to the aircraft factory immediately to be loaded on the C919 passenger aircraft." ”

According to the original technical plan, a C919 passenger aircraft is equipped with two turbofan 16 engines of Tianfeng Technology Company, half a month ago, Ma Delong and Li Tianfeng telephone, informing that the C919 passenger aircraft will be equipped with two turbofan 16 engines has basically completed the production and manufacturing, just waiting for the turbofan 16 engine of Tianfeng Technology Company.

This is also one of the reasons why Li Tianfeng is so anxious, other people's planes are waiting for the rice to be cooked, not in a hurry, fortunately, now these two engines have completed the factory test run.

A big stone in Li Tianfeng's heart also completely landed, and he felt relieved for a while, and he talked to Ma Delong on the phone, and his tone was also very relaxed.

Ma Delong is also more happy, this C919 passenger plane only needs turbofan 16 engines, after the engine is installed, this aircraft can also be test-flighted.

Ma Delong said: "Mr. Li, this is the best news I have heard in the past few days, okay, since the engine has been completed in the factory test, then send it to the aircraft factory, and I will immediately call the person in charge of the aircraft factory." ”

Li Tianfeng also said happily: "Okay, then we will send these two engines to the aircraft factory immediately." ”

The two negotiated a matter on the phone, and Li Tianfeng was also full of hope for this test flight, as long as Shun Lì completed a series of test flight verification, the turbofan 16 engine can apply for a production license and start small batch production.

However, Li Tianfeng and Ma Delong never thought that something would happen soon, and the idea of installing C919 test flights on these two turbofan 16 engines was completely ruined for the time being.

Li Tianfeng finished talking on the phone, and it didn't take long for Zhang Haiping to call, and Zhang Haiping said happily: "Mr. Li, I have good news for you." ”

Li Tianfeng immediately became interested, and immediately asked, "Director Zhang, what good news makes me happy." ”

Li Tianfeng really thought it was good news, Zhang Haiping also thought it was good news, so Zhang Haiping said happily: "Mr. Li, the Yun-8 that is designed according to the new plan has been manufactured, just waiting for your turbofan 16 engine to be tested for flight verification, how about it, this is good news, once the test flight verification is qualified, the turbofan 16 engine will be continuously installed on our Yun-8 aircraft." ”

According to the original technical plan, the Yun-8 aircraft was modified from four old-fashioned turboprop engines to two 16 engines, because only the engine was changed, the overall scheme of the aircraft was basically unchanged, just some simple transformation design based on the engine, the amount of change was not large, and the progress was relatively fast, and the first Yun-8 for test flights had been basically completed, just waiting for the engine.

Hearing this, Li Tianfeng had a big head for a while, and just promised to install the two turbofan 16 engines in the C919 passenger plane, and now the Yunba has also been manufactured, waiting for the turbofan 16 engine to carry out a test flight.

Seeing that Li Tianfeng hesitated for a while, and did not look happy, Zhang Haiping asked with concern: "Mr. Li, is there any difficulty?" ”

Li Tianfeng thought for a while, gritted his teeth and said: "There is no difficulty, the military has priority, and the test flight of the C919 passenger plane will be postponed." ”

The Y-8 is a military aircraft, and the C919 is a civilian airliner, and Li Tianfeng still has a clear distinction between the lighter and the more important, so he can only give priority to the military.

…………

Today's three watches, the third one is sent!

Three more, ask for a monthly pass and a recommended ticket.

In addition, in the military parade marking the 70th anniversary of the victory of the Anti-Japanese War tomorrow, I wonder if there will be any planes such as Yun-8, H-6, and Wuzhi-10 flying over Tiananmen Square. (To be continued......)