Chapter 181: The biggest specialty

Guo Rongwei said that he wanted him to participate in this incident. It was beyond Tan Zhenhua’s expectation. He hurriedly asked: "Teacher, did you make a mistake? This is building an airplane. But with a black eye, you don’t think I can design a four-rotor drone and a civil aircraft, do you?"
Guo Rongwei smashed Tan Zhenhua's head with a thud, and said: "What do you think, you dare to design and draw, but I dare not make it. That is a major event that affects hundreds of lives. How can it be sloppy?"
Tan Zhenhua was dumbfounded. He touched the bag knocked out by Guo Rongwei on his forehead with a bitter face and asked: "Then teacher, what do you mean?"
Guo Rongwei sighed: "Zhenhua, this is a long story, listen to me and tell you slowly."
"Speaking of this "Yun Ten", it can be regarded as ill-fated. When the country issued the "Yun Ten" development task in 1970, it shouldered an important mission. The design goal was to allow the first assistant to fly directly from China to Europe. The beacon of Albany. That’s why we proposed a four-engine, wide body, long range, and high subsonic speed plan. You all know these."
Tan Zhenhua nodded. These are not secrets, they are all publicly reported, and he mentioned them in particular when the three of them had a drink last time.
Guo Rongwei continued, "Even if I don’t want to face it as an aviation person, I have to admit that, as you said, this kind of aircraft, based on our current basic industrial level in China, is actually not well built. What can be made is just a shell that can't be used.
At that time, we made up our minds to design this aircraft based on the airworthiness standard FAR-25 for American transport aircraft, but in the actual manufacturing process, it was actually quite painful. It can be said that problems have been encountered in all aspects of materials, manufacturing processes, and assembly, and the final design capability can only be forced to compromise with the manufacturing capability.
Among the 435 finished products and accessories in the 14 major systems of the "Yun 10" aircraft, 305 must be newly developed. Although relying on the gradually improving relationship between the Western world and us, key equipment such as radar and communication equipment can be solved by imported methods, but the gap in material processing and assembly technology cannot be improved by introduction.
The "Yun Ten" aircraft has many overall structures, large forgings, large skins, and large materials. However, our country does not have the corresponding basic industry and technological support, lacks the giant hydraulic press used for the body keel, and does not have high-strength welding technology. The production and processing are even more difficult. In the face of these situations, you can only be simple because of the rudimentary, and use the native method.
The so-called native method is: there is no equipment for manufacturing large aircraft alloy skins, but smaller military aircraft skins are used for splicing, there is no giant hydraulic press used for processing large body keels, and it is used when processing integral components that cannot meet the design requirements. Small equipment is forged in sections, combined and assembled, and small parts are welded.
There are more than 60 large machined parts such as wing girder, long truss and horizontal tail girder of the "Yun Ten". Due to the large size, complex shape and high precision requirements, only the Xijing Aircraft Manufacturing Plant in our third machine department can process , Forming, but we do not have a large strategic transport plane to perform the transportation task, we can only walk slowly from the ground. As a result, after the first processing, due to moisture on the way back to the magic city, all the grain boundaries are corroded and scrapped, and this problem is basically no Solution, in the end, it was delivered to the Modu Aircraft Manufacturing Plant after its own local method was formed. "
"As a result of this, the empty weight of the "Yun-10" aircraft has greatly exceeded the standard. Even if the length of the aircraft is reduced by a few meters, the empty weight is still heavier than the model "Boeing 707", and the structural strength of the entire aircraft is also worrying and hidden dangers. Many, in fact, there is no guarantee of safety."
"Actually, when the "Yun Ten" first flew in 1980, many comrades in the industry raised doubts. They thought that the strength of the aircraft manufactured in this way was not strong enough. Their worries were actually very reasonable. When the aircraft was assembled and used for static tests, a total of more than 1,650 various faults were found; the second aircraft, the one that flew into the sky, was found to have quality problems with riveted parts during the overall quality review of the aircraft before the test flight. There were 5,312 and 127 major failures, and 825 parts needed to be scrapped and replaced."
"Therefore, although this plane barely flew into the sky in the end, it was still full of hidden dangers. At least, I didn't dare to ride. I really admire Lao Ma and Lao Cheng. They dare to take this plane to the sky. Go for a stroll, I think they were all mentally prepared to be martyrs."
Guo Rongwei finally ended her narration with a wry smile.
Tan Zhenhua was silent after listening to Guo Rongwei's narration.
Huaxia’s family background was originally weak. When the nation was first founded, it was really nothing. Later, by sacrificing hundreds of thousands of people, it won the Goryeo War and won 156 aids from Soviet Russia, which barely laid the foundation for heavy industry. However, the things given by Soviet Russia were not advanced at the time, and after nearly thirty years of staying in place, the desire to eat a fat man in one bite was obviously beyond his own ability.
Not to mention the big guys like "Yun X". In 1962, the "MiG-21" was introduced from Russia in 1962. The domestic gadgets called "J-7" also came with a full set of drawings. Until today, it hasn't been. Completely understand?
Although many aircraft have been produced and the troops are equipped, the quality of the "J-7" has been unstable and the failure rate is high due to material production and manufacturing and assembly processes. Many of the same parts are even between each aircraft. Not universal.
These problems make the flight cost and maintenance cost of the "J-7" high, and the logistical support is very difficult, and these will become fatal flaws in wartime. Presumably, another teacher, Song Wenhua, is still having a headache for this aircraft. Right?
As for the "An-24" that was later introduced and imitated, that is, the "Yun 7", it was a stumbling block. The first test flight took place in 1970, but to this day, in 1982, the test flight is still in progress. There are so many problems.
But these problems can't be changed even if Tan Zhenhua is a born again, not to mention Guo Rongwei doesn't know his true condition.
He looked at Guo Rongwei in confusion, "Teacher, you tell me this. I understand that if we want to build a large aircraft like "Yun X", our basic industrial level needs a major upgrade. At least, To reach the level of the Western world in the 1970s. But what can I do in it? I'm just a junior in high school. Even if I'm a little clever, such a big thing can't be blended with my small body, right?"
Guo Rongwei smiled slightly: "Zhenhua, don't be too modest. Too modest is proud. You, a senior high school student, are much better than many old fried dough sticks on the rivers and lakes. If you don't say anything, just say you drag Wang Ji. Shanxiahai has the ability to help you with the battery, and the last time you let the Miguo buy your drone, I think there are not many people in this world who can match you, at least, there is no one beside me. So, I asked you to participate in this matter, not for you to design the aircraft, you don’t have the ability, it’s not good to say it, not even me, but you can give full play to your specialties."
Tan Zhenhua touched the back of his head and smirked: "Teacher, the more you talk about it, the more confused I become. What is my specialty? What do you think of my specialty?"
Guo Rongwei scowled and drank: "Who doesn't know what to pretend to be, your biggest specialty, Tan Zhenhua, is being able to fool you!"
With Guo Rongwei's suffocation, Tan Zhen immediately understood that the taste was coming. He thought about it carefully, and it was true that the things he did from rebirth were almost entirely based on his own little mouth that could speak well. From the earliest Zheng Xiangqing and Pan Shuisheng to the later Pan Shuisheng wife Liu Mei and Xie Guangfeng, Xie Guangfeng’s son Xie Li, Guo Yicheng and Li Wei, Zhan Nuozhu, Song Wenhua, and Guo Rongwei in front of him, they are thousands of kilometers away. Wang Jishan... wait and so on, he was fooled into his own thief ship, and became his own help. It might not be possible to do it with someone else.
Thinking of this, he couldn't help being smug in his heart, but with a shy smile on his face, he said: "Teacher, you have a good summary. My specialty has indeed played a role."
Guo Rongwei said angrily: "I forgot just now, you have another specialty."
"What is it?"