"Please wait, Academician Yang." Hearing Yang Wei's request, the respondent on the other end of the red phone spoke seriously and solemnly, and immediately transferred to the garrison representative office of Huangtianba Base.

A few seconds later, Lin Jian’s thick and powerful voice sounded from the phone: “Hello, Academician Yang, I am Lin Jian.”

"Representative Lin, I'm going to come to me. There's an important thing." Yang Wei didn't delay. After calling him, he went straight to the point and informed him of the situation.

"Yes, Academician Yang, I will arrive in 3 minutes." As Yang Wei gave the solemn notice, Lin Jian was stunned for a moment, immediately reacted and replied.

"Drip..." In a flash, the encrypted wired telephone communication that lasted for about ten seconds was disconnected, and a busy phone tone came from the microphone.

Yang Wei put the red phone back on the desktop, held the cool white glass with his right hand, put it to his mouth, took a sip to relieve his thirst, and then put it back on the desktop and waited quietly.

Inside the office, silent.

Time passes slowly, three minutes later.

"Dongdong!" A crisp and loud knock came from the light yellow door.

"Please come in."

Yang Wei looked at the door and said in a straight voice.

"Squeak..." The yellowish office door was gently pushed open, Lin Jian, wearing a regular uniform, carrying the rank of colonel, appeared and walked into the office.

The door closed and Lin Jian came straight towards Yang Wei.

"Academician Yang, what's the matter?" Lin Jian came to Yang Wei, showed respectful expression on his face, raised his right hand and saluted, and then asked.

Yang Wei was not polite, staring at Lin Jian in front of him with his eyes, with a serious face and said seriously: "About the fifth-generation fighter jet."

"Fifth-generation fighter jet?"

When Lin Jian was speechless, he was stunned for a moment, and his mind suddenly thought of bad things. His back was subconsciously straightened, and his voice was three points higher, revealing a hint of solemnity: "Academician Yang, is there something wrong with the No. 25 Project?"

As the actual executor of the transformation plan, Lin Jian knew the basic information and overview of the No. 25 Project. The total investment amount of the entire project is as high as 650 billion yuan, and the confidentiality level reaches the first-level top secret core. There are no more than 20 insiders in the country. The real content is the fifth-generation fighter jet that was in development by Cheng Fei.

The real fifth-generation fighter jet is equivalent to the sixth generation of the Russian standard division. It was officially launched in 2015 for research and development.

If there are serious problems in Project 25, this will be a devastating blow to Chengfei and the entire AVIC, and it will be even worse for the country and the Air Force.

"It's not the 25th Project, but the 25th Project is progressing very smoothly. It is a new fifth-generation machine solution that has been feasible tested. The purpose of my search for you is because of it."

Yang Wei shook his head, his face was natural and solemn, and he revealed his information about Project 25 slightly. After a change of tone, he said in a deep voice: "Do you have a tactical tablet?"

"Take it."

Lin Jian nodded and took out the tactical tablet from the file bag he carried with him.

When Lin Jian was ready, Yang Wei immediately opened the confidential computer and extracted the Z-2 fifth-generation machine solution file listed as a level 3 top secret, and sent it to the tactical tablet equipped by Lin Jian through face-to-face transmission.

"Drip!" A prompt sound came out, and the tactical flat panel showed that a new confidential document was received.

Lin Jian clicks on the screen, enters the identity permission password, and then opens the entire file after the system confirms.

The next second, two fighter jet design plans with different shapes suddenly appeared, and the contents of the files were displayed on the screen and caught your eye.

The first Z-2 fighter with the maximum sweep angle of the forward sweep wing is clearly visible in every part of the body, from the close-coupled canard wing + the wings around the front fuselage, to the forward sweep angle using the tandem triangular wing, and the horizontal tail wing with the end of the fuselage outward.

The entire fighter jet exudes a cruel and extremely aggressive feeling. Lin Jian just took a look and his eyes seemed to encounter a magnet, and he could not move away.

After finally moving his sight away and moving downward, when he saw the second diamond-shaped wave-shaped aerodynamic layout of the forward sweeping wings, Lin Jian seemed to be struck by lightning, and was stunned and stood there.

Elegant, noble, and gorgeous posture. The diamond-shaped wave-riding body in the second photo is as daunting as a queen.

Shocked!

Unparalleled shock.

"Academician Yang, is this... a variable forward sweeping wing without a drooping tail?" After two seconds, Lin Jian tried hard to control his emotions, looked up at Academician Yang Wei sitting opposite the desk, opened his mouth, and his throat seemed a little hoarse.

Yang Wei smiled slightly, nodded and replied, "Yes, the code name is Z-2, designed by my student Zuo Xue, what do you think?"

"Compared with the average Z-1 fourth-generation aircraft solution, the Z-2 can be said to be very bold. The first time I saw a pneumatic layout plan without a vertical tail variable forward sweeping wings, which is to my taste." Lin Jian heard this, but he did not expect it was designed by Zuo Xue. Zhou Hai's face subconsciously appeared in his mind. He was not stingy with his praise and made comments from his heart.

No matter which pilot takes a look at the fifth-generation aircraft solution of Z-2, you will definitely be satisfied with it.

The aerodynamic layout without a vertical tail variable forward swept wing is not a little advanced compared to the aerodynamic layout scheme adopted by the fourth-generation fighter at this stage.

Good, Zhou Hai is simply lucky. My girlfriend Zuo Xue quietly took out a brand new aerodynamic layout design for the fifth-generation machine.

"However, Academician Yang, although I am an amateur in aircraft design, I also know the shortcomings of the aerodynamic layout of the forward swept wings. How to solve the aerodynamic elastic divergence?"

After praising her, Lin Jian glanced at Yang Wei with a smile on his face, sorted out his words, and put forward his thoughts: "The Russians abandoned Sukhoi's Su-47 'Golden Eagle' plan because the high-speed aerodynamic elasticity could not be effectively suppressed, and Su-47 could not even maintain supersonic flight for more than three minutes."

Aeroelastic elastic divergence.

Even as an amateur, Lin Jian knew the top fatal flaws facing this forward sweeping wing aerodynamic layout.

Front swept wings have countless advantages, but if this problem is not solved, these advantages are meaningless in the face of the shortcomings caused by the divergence of aeroelastic elasticity and can never be actually used.

It can be said that once the forward swept wing solution is involved, any problems and difficulties encountered in the entire fighter jet development process are not as good as aerodynamic elastic divergence.

The disadvantages caused by divergent aerodynamic elasticity are at the least the damage of the fighter jets, and at the worst the planes are destroyed and people are killed!

"Some." Yang Wei's smile became stronger and stronger.

"What?" Looking at Yang Wei's confident smile, Lin Jian's turn was shocked again this time, and his eyes were filled with incredible expressions, a little unbelievable.

Surprised and shocked.

Lin Jian couldn't believe what he heard.

The fatal defect such as the forward swept wing head, which has left countless aviation experts and aerodynamic experts in the world, has actually been solved.
Chapter completed!