Chapter 86 The Chief Aircraft Designer's Exclamation

Song Wencong originally wanted to discuss the contents of the thesis with Xu Chongxing, but he was stunned when he heard this sentence. He really didn't expect that Xu Chongxing came all the way here with the manuscript of the thesis, but it was not written by him.

Feeling surprised, he immediately confirmed: "Are you really not the author of this paper manuscript?"

"It's definitely not me." Xu Chongxing nodded in response.

After making sure that he had not heard wrong, Song Wencong's mind started to work quickly.

Analyze who else could have written this paper.

"Could it be the professor in your Institute of Fluid Mechanics who made you make this trip in person?"

"I should know him."

"It's not from our Institute of Fluid Mechanics."

When Xu Chongxing saw that Song Wencong had started to use the method of elimination, he stopped keeping the question in suspense and announced the final answer directly.

"In fact, the author of this paper is right here. He is Xu Yuan, a student at Qinghua University."

Almost at the moment Xu Chongxing finished speaking, Song Wencong immediately turned his gaze back to Xu Yuan.

After looking at it carefully, I still don't quite believe it.

"You mean him."

"That's right." Xu Chongxing nodded solemnly when he heard it.

But Academician Song Wencong shook his head and remained skeptical.

"This paper proposes to combine the lifting body winglets and canards, and is even bold enough to design as many as sixteen aerodynamic surfaces. To achieve this level, one must have extensive design experience."

"It's too difficult for one of your graduate students to complete it alone."

As a veteran in the field of domestic aircraft design, he is very confident in his judgment.

I do not think that this thesis can be completed at the graduate level alone.

The degree of difficulty involved is too high.

At this time Xu Chongxing also hurriedly began to explain, but what he wanted to explain was not the thesis issue.

"You misunderstood Mr. Song. Xu Yuan is still a freshman in the Department of Engineering Mechanics at Qinghua University."

"Undergraduate freshman?"

When Song Wencong heard this, his expression froze instantly. His emotions fluctuated even more than when he saw the paper just now. He even started to feel a little angry.

"Nonsense."

"Can you say that casually, Chongxing?"

"You dare to use other people's papers to gild your reputation, and you even gild my head."

“Do you think this is students copying homework?”

In his opinion, for a normal graduate student to write such an excellent paper is already a rare talent, but if it were a freshman, it would be like telling a lie without even thinking about it.

Although it is not known why Xu Chongxing would help do this, the author of the paper must be someone else.

After listening to everything Song Wencong said, Xu Chongxing seemed rather embarrassed at this moment.

I was so excited these past two days that I forgot about it.

Because of his achievements in mathematics, he was shocked but able to accept the innovative canard aerodynamic layout design completed by Xu Yuan.

It can only be said that Xu Yuan is also extremely talented in the field of engineering mechanics.

A rare genius.

But Mr. Song has been obsessed with studying aircraft design for many years and has devoted all his energy to the projects at the institute.

Naturally, I don’t pay much attention to things in other circles.

That is why there are doubts about Xu Yuan's innovative lifting body wing canard aerodynamic layout.

This is normal.

Just as Xu Chongxing was about to explain further, Xu Yuan's voice suddenly came to his ears.

"Academician Song."

“I did complete this paper independently.”

"It was after reading your article on low-aspect-ratio high-lift aircraft that I tried to make innovative improvements to the canard layout."

"If there is anything unreasonable, please correct me, Academician Song."

Xu Yuan did not back down in the face of Song Wencong's questioning, but chose to take the initiative to speak and respond generously.

Song Wencong obviously did not expect Xu Yuan to be so confident. Especially after hearing Xu Yuan talking about the articles he had published, he somehow felt a little strange in his heart.

It seems that Xu Yuanzhen is the author of the paper.

Restraining his emotions temporarily, he intended to test Xu Yuan on the contents of his paper.

His thought stopped here and he immediately said, "Since the paper was written by you, tell me why you chose this design." After that, he stared at Xu Yuan and waited for his answer.

"Just speak if Academician Song asks you to." Upon hearing this, Xu Chongxing turned around and said encouragingly to Xu Yuan.

Xu Yuan had nothing to be afraid of. He just organized his words in his mind and started talking freely.

"The aerodynamic characteristics of the traditional canard aerodynamic layout are unstable, especially at supersonic speeds, where the problem is further magnified. In addition to the problem of structural strength, the nose-down moment efficiency will also be significantly reduced."

"For this reason, I got inspiration from your article, Academician Song, and adopted the innovative design of the lifting body side wing canard layout."

"It ensures that the fighter has excellent aerodynamic performance in supersonic, transonic and subsonic conditions."

"In addition, with this layout, the canard has the triple functions of pitch control, vortex generation, and vortex control. The overall utilization of the vortex field by the aircraft far exceeds that of previous models." ...

Song Wencong listened carefully to Xu Yuan's speech, and his original questioning expression gradually disappeared as time went by.

Instead, his eyes showed appreciation and praise.

At this moment, he finally believed that the paper was indeed written by Xu Yuan.

The thesis may have borrowed some information from plagiarism, but Xu Yuan's understanding of the innovative canard aerodynamic layout and his advanced ideas cannot be faked. Even he feels refreshed.

Although these remarks may seem a bit strange coming from an undergraduate freshman.

But facts are facts.

No one is allowed to distort or neglect it.

However, he did not mean to let Xu Yuan stop at this time. Instead, he pointed out the shortcomings of Xu Yuan's lifting body side wing canard layout.

I want to see what level Xu Yuan’s level is.

"Your proposal is indeed the most perfect canard layout I have ever seen, but with so many aerodynamic surfaces, the aerodynamic complexity can be said to be rare in the world. If our fighter jet adopts this appearance, it will have extremely high requirements for the flight control system."

"In addition, the diamond-shaped nose plus the DIS air intake, as well as the canard edge strip and large delta wing aerodynamic layout, the final optimized shape will be an ultra-long fuselage."

"Do you think this aerodynamic structure layout is suitable for our future latest generation of stealth fighters?"

Song Wencong is worthy of being the domestic chief aircraft design expert.

In such a short period of time, in addition to being amazed at the innovative aerodynamic layout of the lifting body, wing and canard, I also noticed the existing problems.

Xu Yuan was naturally aware of these situations, but after all, the design of a fighter jet's appearance could never be perfect.

Always keep some, optimize some, and give up some.

The key is to meet your own needs.

With his mind working quickly, he gave his answer in a deep voice without any hesitation.

"Academician Song."

"I'm sure a good flight control system won't be a problem for us."

"The long fuselage provides a sufficiently long lever arm for the canard and vertical tail, and the supersonic maneuverability, stability and trim capabilities are particularly outstanding."

"In addition, the long fuselage also means a larger internal volume, which can accommodate a large bomb bay to carry more ammunition."

"The aerodynamic layout I designed is certainly not perfect, but all fighter planes are the product of compromise."

"Whether it is a duck-style layout or a traditional layout, the choice is determined by demand."

"From the perspective of our current level of supporting facility R&D and manufacturing, the canard layout with some excellent performance in the supersonic field is the most suitable."

"That's all I have to say."

Xu Yuan almost spoke out the core content of the paper in one breath, and paused after saying the last word.

He met Academician Song's gaze with a firm look, waiting for his next words.

After about two seconds, Song Wencong suddenly showed an appreciative smile on his face, and he stretched out his hands to applaud.

"Wonderful."

"What a terrifying life!"

"Bravo."

He expressed his admiration in a series of sentences without any reservation, which was enough to show his approval of what Xu Yuan had just said.

It was not until now that Song Wencong finally understood why Xu Chongxing had brought a student here specially.

Then he turned his head and said to Xu Chongxing, "We, the old comrades, can finally rest assured that you have trained such an outstanding engineering mechanics genius." His words showed his love for Xu Yuan.

It's a stark difference from his attitude just now.

At this time Xu Chongxing finally breathed a sigh of relief, and with a happy look on his face he quickly added.

"Xu Yuan is not only a genius in engineering mechanics, he also majored in mathematics."

"Not only is he the champion of the International Mathematical Olympiad, he also took the top spot in the college entrance examination with a nearly perfect score."

“Not long ago, I published my first paper in the Annals of Mathematics, successfully solving the problem of infinite Carmichael number intervals. For this reason, the school also cooperated to hold an academic conference on number theory.”

Song Wencong did not know about these honors that Xu Yuan had received. It was only after hearing about them from Xu Chongxing that he felt as if he had suddenly realized something.

“It turns out there are so many achievements.”

No wonder Xu Yuan was able to complete this paper, it turns out that he is a genius in the field of mathematics.

Perhaps it was because he saw that the country had such outstanding talents, or perhaps it was because the appearance of the latest generation of stealth fighter jets had taken shape, Song Wencong was happier than ever before.

It can be said that if Xu Yuan was not still an undergraduate student, he would have wanted to recruit people directly to the research institute.

In the following time, Song Wencong talked about the current development of the latest domestic fighter jets, and had new plans for the innovative canard aerodynamic layout structure of the lifting body winglets designed by Xu Yuan.

"Recently, everyone has been arguing about whether to continue to optimize existing fighters or directly develop the latest generation of stealth fighters."

"Because we want to catch up with the level of foreign fighters, this requires the latest generation of stealth fighters to have excellent performance."

"As a result, the project has not been approved yet, and we are unable to determine the aerodynamic layout that best suits us."

"But Xu Yuan's paper may change the current situation and prompt the development of the latest generation of stealth fighter jets to be approved as soon as possible, so I plan to take this paper to the Yanjing headquarters to apply."

When he said the last sentence, Song Wencong's expression was more determined than ever, as if he had made up his mind.

(End of this chapter)