Chapter 415

The bright, smooth and cool metal touch is like a dust removal girl, which makes Wu great wall feel unreal.

No rivets!

Wu Changcheng couldn't believe it if he hadn't seen it and touched it with his own hands. If he could be the deputy director of the grain aircraft test center, his attainments in aviation were no worse than those of the old professors in front of him.

But just because of this, the improved yun-5 in front of him had a great impact on him, just like an atomic bomb explosion.

You know, as long as it's an airplane, it's basically inseparable from riveting. Because of this, ordinary airplanes are just like women's faces. They look like a flower from a distance and feel OK. If you look closer, you can see the acne and freckles clearly, which is somewhat disappointing.

It's the same with airplanes. When you walk in, rows of rivets are all over every corner of airplanes. They are the most used parts in the field of aircraft manufacturing.

However, in front of the improved Yun 5, the whole fuselage is integrated without any riveting marks, which makes Wu Great Wall very surprised. How did it do it.

Looking at Wu Changcheng's puzzled eyes, Ding laixiang's expression became more strange. As soon as he was ready to open his mouth, he saw a man turning out on the other side of the fuselage. Ding laixiang quickly waved: "Xiao Lin, come here and tell director Wu about your plane."

Lin Guanghua came with the plane, not with the expert group composed by Ding laixiang and others. After all, as the general director of the improved yun-5 project, Lin Guanghua cared more about the situation of the plane, so although he was slower and tired on the road, he came with the car himself.

When he came to the aircraft test center, he didn't go to Ding laixiang. Instead, he checked the basic condition of the aircraft with several technicians of Tengfei manufacturing corporation. It was not too late to go to Ding laixiang after he finished the work here.

But he didn't expect that Ding laixiang and others would come just after he was in the middle of the process. When he saw Ding laixiang waving, Lin Guanghua explained to his assistant a few words, and then walked over quickly. After introducing Wu Changcheng and some old professors, he exchanged greetings with each other, and then reflected with Wu Changcheng: "people in the center just now may not understand our aircraft performance, and they found that we are not good at it There is no ring-shaped load-bearing beam structure inside the fuselage. I'm afraid that the crane will hurt the aircraft and dare not operate it, so... "

Before Lin Guanghua finished speaking, Wu Changcheng, who was already surprised, immediately stared as big as a copper bell, and immediately interrupted Lin Guanghua's words with a tone change: "what do you say? Is there no ring beam in the main structure of your aircraft? "

Wu Changcheng turned to look at Ding laixiang and others. He found that the old professors' faces were dim and could not see why. Instead of asking each other, he boarded the plane through the open cockpit door.

Because it is a testing machine for static test, this improved yun-5 has no decoration, just an empty shelf like a whiteboard. Only in this way can we better test the durability of the fuselage, the fatigue degree of various parts, the appropriateness of materials, and the stress condition of the aircraft under heavy overload. Based on this, the aircraft will have more stable and safer performance after improvement .

Of course, in addition to the static testing machine, there are also the hydraulic testing and Avionics testing machine and the whole system testing machine for flight test.

Three verification mechanisms become the basic framework of test verification.

In addition, the Xiping aircraft factory of Tengfei aviation manufacturing corporation has already completed the assembly of the other two test verification aircraft, but they have not been delivered.

The reason is very simple. The technical expert group composed of Ding laixiang and others thinks that there is a serious safety problem in the improved operation 5 of Tengfei aviation manufacturing corporation. It is suggested that Tengfei aviation manufacturing corporation should control the new technology below 30% of the total amount, so as to avoid the risk of uncertainty caused by out of control performance.

Take off aviation manufacturing corporation has taken a big step, which is beyond the thinking and cognition of these old experts. You'd better come back and follow the old luck 5 slowly. Don't make a word of it as soon as you come up. The hearts of the old people are not very good.

Yes, after Ding laixiang and others accepted the invitation of the aviation manufacturing corporation and reported to the Ministry, they formed an expert group to see the latest improved yun-5 prototype in Xiping factory. Their shock appearance was better than that of Wu Changcheng.

Not to mention anything else, the ring-shaped load-bearing beam of the main structure was completely cancelled, which made the old couple's heart almost stop.

What is a ring beam?

If the plane is compared to a house, it is the beam and load-bearing wall; if the plane is compared to a human body, it is the skeleton of the plane.

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

The house can't be crossed and people can't be paralyzed.

As a result, such an incredible thing happened in front of us. The attitude of several old experts can be imagined. After such a flight, a gust of wind will not blow away.

Therefore, it is very serious to put forward the proposal of reducing the application of new technology and following the old model architecture to Tengfei aviation manufacturing corporation.

However, when this idea was sent to Zhuang Jianye, he was not good enough for Tengfei Aviation Manufacturing Corporation, but Lin Guanghua, the general manager of the project, gave up.It was his painstaking efforts. How could he say that he would overthrow the old one? So he found his tutor and argued about various theories and technologies for three or four days. In the end, Zhuang Jianye, a rich man, took out 300000 yuan to pull the No.1 verification plane to the grain flight test center. This brought an end to the debate of aviation technology between the new and old generations.

Speak with facts!

This is what Lin Guanghua and several old professors, the new and old generations of technologists, said. Because of this, the old professors' faces were very strange when they asked about Wu Changcheng several times, and they were very nervous when they couldn't help it.

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

Wu Changcheng is the only one who is not nervous about the whole scene, because he has been shocked all over his body. From the cockpit to the end of the final warehouse, there is a length of more than seven meters, which is even integrated. Let alone the ring bearing beam, there are very few common rivets.

That is to say, Wu Changcheng looks carefully, otherwise the hidden rivet structures are easy to be ignored.

Looking at it so carefully, Wu Changcheng finally understood why the officer just now didn't dare to lift. Even if he changed his mind, he had to beat a drum. There was no way. There was an accident in the test center before when the crane lifted the plane and broke in the middle. Later, it was found out that the reason was that the body strength was seriously insufficient.

Today, the improved yun-5 of Tengfei aviation manufacturing corporation has no ring-shaped load-bearing beam and no riveting technology. It is not only lack of structural strength, but also fat meat without bones. If it really needs to be lifted and cracked, who will bear the responsibility?

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

"Inside and outside are all aluminum lithium alloys."

"Inside and out? Aluminum lithium alloy Hearing this, Wu Tiancheng's eyes narrowed unnaturally: "what about the middle?"

"Aramid paper!"

Wu Changcheng, who originally wanted to test materials by hand, couldn't help taking a breath of cold air: "aluminum lithium alloy, aramid paper Composite honeycomb structure material on French Mirage 2000