The bright, smooth, and slightly cool metal touch, like a dusting girl, makes Wu Changcheng feel a little unreal.

No rivets!

If he hadn't seen it with his own eyes and touched it with his own hands, Wu Changcheng couldn't believe that all this was true, you must know that he could serve as the deputy director of the Grain Aircraft Test Center, and his own attainments in aviation were no worse than those of the old professors in front of him.

But because of this, the impact of the improved Y-5 in front of him was as great as an atomic bomb.

You must know that as long as it is an airplane, it is basically inseparable from the riveting process, because of this, the general airplane is like a woman's face, looking like a flower from a distance, I think it's okay;

The same is true for airplanes, when you walk in, rows of rivets are densely packed all over all corners of the aircraft, which is the most used parts in the field of aircraft manufacturing.

However, the improved Yun-5 in front of him, the entire fuselage is integrated, without the slightest trace of riveting, which makes Wu Changcheng very surprised, how did it happen.

Looking at Wu Changcheng's puzzled eyes, Ding Laixiang's expression became even more strange, and just as he was about to speak, he saw a person turn out on the other side of the fuselage, Ding Laixiang hurriedly beckoned: "Xiaolin, come over here and tell Director Wu about your plane." ”

Lin Guanghua came with the plane, and did not come with the expert group composed of Ding Laixiang and others, after all, as the general person in charge of the improved Yun-5 project, Lin Guanghua cared more about the situation of the plane, so although the road was a little slower and tired, he still followed the car in person.

When he came to the aircraft test center, he did not go to Ding Laixiang, but first checked the basic condition of the aircraft with several technicians of Tengfei Manufacturing Corporation, and waited to finish the work here, and then it was not too late to find Ding Laixiang.

But he didn't expect that Ding Laixiang and others came over just halfway through his side, so seeing Ding Laixiang beckoning, Lin Guanghua walked over quickly after explaining a few words to the assistant next to him, and after introducing Wu Changcheng and several old professors, they exchanged a few words of greetings, and then reflected to Wu Changcheng: "The people in the center may not know about the performance of our aircraft just now, and found that there is no annular load-bearing beam structure inside our fuselage, for fear that the crane will hurt the aircraft, and dare not operate, so ......"

Before Lin Guanghua finished speaking, Wu Changcheng, who was already surprised, immediately widened his eyes as big as copper bells, and then interrupted Lin Guanghua's words in a tone change: "What did you say?

As soon as the words fell, Wu Changcheng turned his head to look at Ding Laixiang and the others, and found that the faces of these old professors were dark and gloomy, and they couldn't see why, so they didn't ask each other, but boarded the plane along the open cockpit door.

Because it is a verification machine for static testing, this improved Y-5 does not have any decoration, it is an empty shelf like a whiteboard, so as to better test the durability of the fuselage, the fatigue degree of each part, whether the materials are appropriate, and the force of the aircraft under large overloads and other basic conditions, based on this, the aircraft will perform more smoothly and safely after improvement.

Of course, in addition to the demonstrator for static testing, there are also demonstrators for hydraulic testing and avionics testing, as well as full-system demonstrators for flight testing.

The three verification bodies have become the most basic structure for test verification.

The other two test and demonstration planes, the Xiping Aircraft Factory under the Tengfei Aviation Manufacturing Corporation, had already completed the assembly, but they were not delivered.

The reason is very simple, the technical expert group composed of Ding Laixiang and others felt that there were serious safety problems in the improved Y-5 of Tengfei Aviation Manufacturing Corporation as a whole, and suggested that Tengfei Aviation Manufacturing Corporation should control the new technology below 30% of the total amount, so as to avoid the uncertain risk caused by runaway performance.

Translate Chéng Rén's words that Tengfei Aviation Manufacturing Corporation has taken too big a step, beyond the thinking and cognition of these old experts, so it is better to come back obediently, take your time according to the old luck 5, don't get a word or something as soon as you come up, the old ones are not very good.

Yes, Ding Laixiang and others accepted the invitation of the Aviation Manufacturing Corporation, and after reporting to the ministries and commissions, they formed an expert group to go to the Xiping factory to see the latest improved Y-5 prototype, and its shocking appearance was better than that of Wu Changcheng.

Not to mention anything else, the annular load-bearing beam of the main structure alone was canceled by one of them, which made the hearts of the old people almost go into arrest.

What is an annular load-bearing beam?

If you compare an airplane to a house, it is a beam, a load-bearing wall, and if you compare an airplane to a human body, it is the skeleton of an airplane.

No matter what kind of house is built, whether people look ugly or beautiful, who has ever heard of a house without beams, without load-bearing walls, and without bones?

The house must not be straddled, and the man must not be paralyzed.

The result is such an incredible thing, just in front of my eyes, the attitude of several old experts can be imagined, after such a plane goes into the sky, a gust of wind can not be blown away.

Therefore, it is very serious to put forward a proposal to Tengfei Aviation Manufacturing Corporation to reduce the application of new technologies and follow the architecture of the old model.

However, where did this opinion go to Zhuang Jianye, he, the Tengfei Aviation Manufacturing Corporation, was not doing well, but Lin Guanghua, the general person in charge of the project, quit first.

That was his painstaking efforts, how could it be said that the old overthrow was overthrown, so he found his own mentor, all kinds of theories, all kinds of technologies for three or four days of debate, and finally Zhuang Jianye, who had a lot of money, took out 300,000 yuan to pull the No. 1 verification aircraft to the grain flight test center for more than two pounds, which brought the new and old generations of aviation technology debate to an end.

Speak for the facts!

This is the voice of Lin Guanghua and several old professors, the new and old generations of technical people, because of this, several old professors asked Wu Changcheng several times with strange faces, no way, the old people are very nervous.

So Lin Guanghua had to follow the car in person and check it carefully, because he was even more nervous.

The only estimate that is not nervous at the whole scene is Wu Changcheng, because he has been shocked and filled his whole body, only to see that from the cockpit to the tail of the last cargo compartment, there is a length of more than seven meters, and it is completely integrated, not to mention the annular load-bearing beam, that is, there are very few common rivets.

That is, Wu Changcheng looked carefully, otherwise the few rivet structures that were hidden very deeply were really easy to ignore.

After looking at it so carefully, Wu Changcheng finally understood why the officer just now didn't dare to hoist it, even if he changed his heart, he also had to play a big drum in his heart, there was no way, the test center had an accident in the middle after the crane lifted the plane up, and then found out that the reason was a serious lack of strength of the body.

Nowadays, the improved Yun 5 of Tengfei Aviation Manufacturing Corporation has no annular load-bearing beam, and there is no riveting process, not to mention the lack of structural strength, it is simply a fat without bones, and it is really broken in the middle of the click, who bears this responsibility?

Realizing this, Wu Changcheng was ready to push this test back, but he couldn't speak directly, after all, people paid for it, so he wanted to pretend to find an excuse, so he patted the bulkhead and then looked up at the metal structure of the integrated internal bulkhead and asked Lin Guanghua next to him: "What material do you use for such an overall complex part?"

"The interior and exterior are all aluminum-lithium alloys. ”

"Inside and outside, aluminum-lithium alloy?" Hearing this, Wu Tiancheng's eyes narrowed unnaturally: "What about the middle?"

"Kevlar paper!"

Wu Changcheng, who originally wanted to drag the test from the material, heard this, and couldn't help but gasp: "Aluminum-lithium alloy, aramid paper...... Composite honeycomb structure material on the French Mirage 2000 fighter?"