When Wang Dazhi heard this, he breathed a sigh of relief, Viktor Vladimirovich Kapaya is the anchor of COMAC in the field of helicopters, and there must be no problems.

Looking at Wang Dazhi's appearance, Meng Haibo smiled instead: "Lao Wang, you think too much, what kind of big scene has Lao Maozi never seen? It's just a test flight with no injuries, do you think Lao Maozi can take it seriously?"

Also!

Hearing what Lao Meng said, Wang Dazhi also felt that he had overreacted a little: For Victor, the former deputy chief designer of the Miri Design Bureau, he had never seen any big scenes? Moreover, this time the incident was said to be very big, but it was not big or really big, and the two test pilots were ejected in time, and the plane did not explode, so what do you want to do? As long as you find the reason why the flap oil pipe cracks, nothing else is a problem.

Thinking of this, Wang Dazhi's face relaxed a lot, but then again, Viktor Vladimirovich Kapaya's old hairy man is the chairman's eyeballs, and he is really afraid of melting in his mouth and holding it in his hand for fear of being scared, although he knows that this matter has nothing to do with Viktor Vladimirovich Kapaja, Wang Dazhi still said to Meng Haibo: " Lao Meng, you go and do Victor's ideological work, tell him not to have any pressure on this matter, it is normal to drop two planes during the development of the plane, if you feel uncomfortable, then rest for two days......"

"Wang, I'm fine, nothing is uncomfortable. Before Wang Dazhi's words fell, the voice of Viktor Vladimilovich Kapaya came.

Hearing the voice of Viktor Vladimirovich Kapaja, Wang Dazhi hurriedly greeted him and said with a smile on his face: "Victor, how is it, has the cause of the problem been found?"

As he spoke, Wang Dazhi noticed that Viktor Vladimirovich Kapaya was still carrying a metal pipe in his hand.

"Found it," Viktor Vladimirovich Kapaya nodded, pointed to the thing in his hand that resembled a tubing and said to Wang Dazhi: "Wang, this is the burst hydraulic oil pipe, you see here, there are very serious signs of wear. ”

Wang Dazhi took a closer look, and sure enough, the hydraulic oil pipe in Viktor Vladimirovich Kapaja's hand had very serious wear marks on it, and the burst place had even been rubbed into a flat surface. He suddenly frowned: "The reason why the oil pipe bursts is because this part of the oil pipe has been worn through?"

"That's the reason," Viktor Vladimilovich Kapaya nodded, "and it also shows that the design of the tubing in this place is not in place." ”

When the plane is parked on the ground and flying in the air, the shape of the wing will undergo a very large deformation, taking the American B-52 bomber as an example, when the plane is parked on the ground and flying in the air, the difference in the position of the wing tips can reach more than 7 meters!

That's more than two floors!

With such drastic deformation, and the need to maintain the performance of the wing for decades to come, you can imagine how high the requirements for the design of the wing are.

Of course, not only the B-52 is a large aircraft, but also the wing of the Boeing 737, our most common medium-sized aircraft, will also produce elastic deformation, and even the Cessna 172, a light aircraft with a maximum weight of just over a ton, will also have deformation, which is normal, and the designer will inevitably reach this point when designing the wing and arranging the internal pipelines and wires, but the hydraulic oil pipe of the technical verification machine called the tiltrotor machine was actually worn through, which can only be said to be a very low-level mistake.

So, whose mistake is this?

Wang Dazhi knew that Chen Geng attached great importance to this tiltrotor technology verification machine, so he attached great importance to the daily research and development work of this aircraft and the flight test process, knowing that although this technology verification machine was designed by Viktor Vladimirovich Kapaja, in fact, Viktor Vladimirovich Kapaya was more of the chief designer, he took out the overall design ideas and specific requirements, and then assigned the design work of each part to the following groups, such as the wing design team, Engine nacelle design team, fuselage design team, landing system design team...... Each group is both independent and cooperative.

Thinking of this, Wang Dazhi had an idea in his heart: Could it be the problem of the wing design team?

But before he could speak, Viktor Vladimirovich Kapaya said with a look of shame: "Speaking of which, most of the responsibility for this crash is on me. ”

"Huh?"

Hearing what Viktor Vladimirovich Kapaya said, Wang Dazhi and Meng Haibo were stunned for a moment, and their eyes fell on Viktor Vladimirovich Kapaya: This guy ...... Isn't he taking the initiative to take responsibility for his group members?

Without waiting for Wang Dazhi to speak, Meng Haibo hurriedly said: "Victor, I remember that the wing was not designed by you, right?"

"That's right, I didn't design the wing," Viktor Vladimirovich Kapaya nodded, but before Wang Dazhi could speak to Meng Haibo, Viktor Vladimirovich Kapaya continued: "But I reviewed it, that is, I signed the final document." ”

Wang Dazhi and Meng Haibo glanced at each other and stopped talking: From this point of view, there is no problem, whoever signs is responsible, this is the same in ancient and modern China and abroad.

Viktor Vladimilovich Kapaya continued with a look of shame: "The comrades of the wing design team did not fully consider the amplitude of the deformation of the wing of the aircraft in various flight states after placing the engine nacelle in the wing tip position, and the amount of calculation was insufficient, and I also made an empirical mistake, did not fully calculate the wing deformation in some large overload conditions, and was not rigorous enough in the review, which caused this accident. ”

I see!

At this point, where did Wang Dazhi and Meng Haibo still not understand what was going on?

To put it simply, whether it is the wing design team or Viktor Vladimirovich Kapaya did not fully calculate the state of wing deformation of the aircraft in some extreme flight conditions, which led to the fact that the hydraulic oil pipe would not wear out in ordinary flight conditions, but in some extreme flight attitudes, because the deformation of the wing was more visible, it had a violent friction with this hydraulic oil pipe, and finally wore through the hydraulic oil pipe that controlled the flaps over time, causing the pilot to lose control of the flaps, resulting in this accident.