Siheyuan starts from a good life

All preparations are completed, "The wind speed is suitable, aircraft 1 and 2 will be accompanied, and runway will take off first."

"Test aircraft No. 2, runway three, get ready for takeoff."

Jiang Yan looked at the three planes running up from the tower and listened to the commander's voice in his ears.

"Comrade Jiang Yan, do you have any other instructions? The plane is about to take off." The commander suddenly asked Jiang Yan at this time.

Jiang Yan thought for a while and said directly into the microphone, "Test aircraft No. 2, just fly normally. If the aircraft trembles, return immediately. Return immediately."

"Test Plane Two understands."

Jiang Yan stood on the tower and watched the plane taxi and then smoothly rise into the sky.

However, in order to reassure everyone on the ground, the pilot on the test aircraft did not perform any dangerous operations. But it was flying smoothly.

Jiang Yan looked through the telescope and the fighter plane was flying very smoothly at this time. Jiang Yan also looked at the right half of the fuselage specifically, but it was far away and he couldn't see any problems at the moment.

According to the test pilots, this resonance occurred during the rapid climb of the fighter plane.

At this time, I heard the plane shouting. "Tower, tower, this is test aircraft No. 2. It is currently flying in good condition and no problems have been found. Please raise it quickly."

"The tower has received it and allows the lift to be raised. Please pay attention to safety."

"Roger that!"

After a skillful and beautiful lift, the test aircraft entered the stage of smooth flight again.

However, during the initial pull-up process, the test pilot could clearly feel the vibration on the right side of the aircraft. The faster the pull-up speed, the stronger the vibration.

To verify the accuracy of this question, the pilot again performed a quick pull-up flight.

The test plane was flying freely, and the people below were extremely nervous at this time. They raised their ears and listened carefully to the sound of the engine in the air. As long as there was nothing wrong with the sound of the plane's engine, it meant that There is nothing wrong with the plane.

When Jiang Yan was nervous, Jiang Yan heard again, "Tower, tower, this is test aircraft No. 2, requesting to return."

"The tower received it, everything on the ground runway is normal, and return is allowed."

More than twenty minutes earlier than originally expected, Jiang Yan and others also left the tower when they heard the plane began to return, and came to the runway to wait for the plane to land.

On the ground, everyone can already see clearly how Wu Ye flies in the sky, but at this moment, everyone's hearts are lifted up, because everyone knows that this It is during the process of taking off and landing that aircraft are most prone to dangers and problems.

When flying smoothly in the sky, under normal circumstances, there will be no problems unless you encounter some extreme airflow, but the probability of encountering that situation is extremely small.

After a while, the fifth aircraft that was tested slowly landed on the wide runway. The fuselage began to contact the ground steadily, making a faint sound of tire friction.

Wuye's landing gear compressed slowly, absorbing the impact during landing. The braking system was precisely controlled by the pilot, allowing the aircraft to decelerate smoothly on the runway.

After a period of taxiing, the aircraft stopped steadily on the runway.

Every step of the landing touched the hearts of the people on the ground. When they saw the plane stop smoothly, many people jumped up waving their clothes.

Although the chance of something going wrong with this sick Fifth Master is only 78%, this 78% chance is the mortality rate. For a person, it means life or death. The test!

After the plane stopped, as soon as the door opened, the pilot inside spoke.

"Mr. Jiang, I feel it. You are right. There is an obvious vibration on the rear half of the right wing."

When the plane took off, Jiang Yan specifically told the test pilot a few places he had to estimate, but he didn't expect it to actually be there.

Although the test pilot's voice was not loud, it was enough for those present to hear clearly.

"Dismantle it quickly." After Jiang Yan said this, he took the tools and started working.

"General Engineer Lu, please quickly organize people to remove the second half of the right wing of the first Fifth Master." Dean Tang reacted and began to give instructions.

Although Chief Engineer Lu was eager to know the reason, he temporarily suppressed his thirst for knowledge and quickly organized people to dismantle the wings of the Fifth Master's aircraft as required.

"Here, and here, yes, right here, remove all these rivets. Slowly, don't touch the things behind, be careful." Jiang Yan directed the staff and nervously dismantled them.

The disassembled aircraft parts were carefully put aside by the staff and marked with corresponding numbers.

When the first part was disassembled, Jiang Yan took it out and observed it eagerly.

"Look, Dean Tang, the problem lies here." After Jiang Yan looked at all the parts, he took a few damaged parts and said to Dean Tang and others who were standing next to him.

Dean Tang looked at Jiang Yan's palm and saw that Jiang Yan was holding a few inconspicuous parts. There were some scratches visible to the naked eye on these parts.

The location of these inconspicuous parts is on the inside of the wing, where they are used to connect the rear part of the fasteners and fit into the fuselage. Ordinary people will not notice this at all.

"Comrade Jiang Yan, are you sure that it is this small link part that causes the resonance of the aircraft?" Director Shen looked at the few inconspicuous parts in Jiang Yan's hand with some disbelief.

Hearing Director Shen's words, Jiang Yan rolled his eyes at him in his mind. They were inconspicuous. These parts were the parts that fixed the links of the fuselage. Their importance could not be explained in a few words.

But when he heard him asking, Jiang Yan nodded: "Basically, it's almost the same. Didn't I just ask Mr. Lu to dismantle the wings of the Fifth Master's aircraft?"

"After comparing it with the one on the fifth master, I can basically be 100% sure."

"Then what are you waiting for? Let's go to the hangar quickly." Upon hearing this, Dean Tang quickly pulled Jiang Yan into the car and rushed to the hangar where the other Fifth Master was parked.

When Jiang Yan and the others arrived at the hangar, the right wing of the first Fifth Master had also been removed. Jiang Yan directed the staff to remove the same parts at the same location.

After placing the gaskets at the same location on the two Fifth Masters on a tool table, Jiang Yan took a look with some magnifying glasses and immediately confirmed the real problem.

Jiang Yan pointed to the parts that looked exactly the same from the outside and said: "Everyone knows that when our fighter jets fly at high speed, air shock waves will produce a lot of resistance. In addition, the pressure difference between the front and rear will produce a pressure Drag, there's a lot of compression between the nose and the wings and the tail..."

"This gives our fighters a high chance of resonance."

"But at the end of the day, if the material is strong enough, there won't be any problems..."

"The cause of aircraft resonance is the problem of the material itself."

"But don't underestimate these inconspicuous linking parts. The process requirements are quite strict and no worker above Level 4 can make them."