Sichuan and Shu Mountain Area.

A peregrine falcon was gliding quietly in the air, its sight alertly scanning the clearings below, waiting for today's lunch to appear.

This peregrine falcon is one of the extremely rare subspecies in China. Its body length is 60 cm and its wingspan reaches an astonishing 120 cm. Although this body size is not large among the world's Raptors, it still easily topped the list of Raptors with the ultimate flight speed of more than 300 kilometers.

It is September now. According to the habits of peregrine falcons, it should have set off to fly to Yangcheng thousands of miles away for winter, but it has no intention of leaving at all. Instead, it flew around in the cold wind that has gradually turned cold, quietly waiting for the arrival of a certain moment.

Yes, it is a bird of wisdom.

After chasing the target and flying into this mountain by chance, after several months of observation, it has gradually discovered the difference between this mountain and other peaks it flew past.

Here, most of the mountains are exposed--even if they are not exposed, they are only newly grown and not tall trees.

In contrast, there are many preys in this forest and very stupid. Unlike the cunning prey it has pursued, the crows here, the pheasants here, the voles and rabbits here seem to have never learned how to survive. They will always rush out of the forest at a certain point in time and be exposed to their sharp claws.

And at this time, it is often the time to have a feast for yourself.

It doesn't know why it caused all this. After all, it lives in the air all year round and walks through the turbulent flow, it cannot feel the abnormality felt by its prey. It only knows that such riots will happen again soon.

As time passed by minute by minute, as the sun rose higher and higher, the wind became a little hot. Just as it was about to lose patience, the leaves on the ground suddenly trembled slightly for no reason.

Then countless birds flew up from the forest, and the voles and rabbits rushed out of their caves. The peregrine falcon held up its wings and howled down with the strong wind. Before the fattest rabbit could come back to its senses, a black shadow flew past.

Then, the hare collapsed to the ground, and its head had been completely shattered by the peregrine falcon's sharp claws.

A few seconds later, the peregrine falcon landed leisurely and began to enjoy this lunch that was free of effort.

And this scene was seen by the two people who were also standing leisurely on the top of the mountain.

......

This is the large wind tunnel experimental base of Sichuan and Shu jf-22. Wang Rui and Su Guan had just finished their morning experiments. When they walked out of the experimental base to let go, they happened to see the scene of peregrine falcon hunting.

"So fast...my eyes can't keep up with its movements. This should be the fastest bird in nature, right?"

Su Guan sighed, he regretted not taking out his cell phone to take a photo when he noticed the peregrine falcon, and missed the most exciting hunting process.

Wang Rui nodded and replied:

"It is indeed the fastest bird in the world - it is also an Arabian bird. However, this kind of bird is actually rare in ours. It is slightly more common in the southeast and north. It is a good sign to be seen here."

"I heard from other colleagues that the peregrine falcon has been here since two months ago. It seems that it has learned some rules. As soon as our wind tunnel opened, the noise and vibration came out, and when other animals were scared and ran around, it came out to hunt."

"If you want to shoot, wait early next time. If the temperature continues to turn cold in another month, it will definitely leave. No matter how much food it is, it will not be able to withstand heavy snow."

“Will it snow here?”

Su Guan asked curiously.

"It's not snowing... It's high altitude here and is more dependent on quilts. Every year, there will be one or two snowfalls in the cave. When the conditions were poor in the past, we were sent to remove snow - to remove snow from the mountains, dare you believe it?"

"I don't know who said it. After the snow seeps into the strata, it will affect the stability of the wind tunnel. Then the leader at that time was also a fool, and he believed whatever he said. It was a cold weather and took our hundreds of brothers to run outside to shovel the snow."

"At that time, this place was still deserted and large equipment could not be in. It was all artificial. We shoveled it while going down from the sky."

"It's quite absurd to think about it now. More than ten years have passed in a blink of an eye. Looking back, it's interesting."

"At that time, there were still many living things in the snow. We caught a yellow-skinned boy-----Do you know? The yellow-skinned boy will change his skin in winter. The fur is snow-white, so cute."

Su Guan, who was standing beside him, nodded slightly and replied:

"I have seen this in the video. The yellow-skinned zodiac is from the family Weedaceae, and the family Weedaceae are basically cute."

"But then again, does snow really have an impact on the wind tunnel? We are now in the critical period of testing. Don't have a snow to affect the accuracy of the data, that's all."

Wang Rui shook his head and replied:

"There is a hammer's influence. Besides, it doesn't matter if it has an impact. After the last experiment was completed this afternoon, all the wind tunnel experiments of Jinwu were completed. After this big project is over, we will definitely have a long vacation."

"The next high-intensity test like this will probably be until the spring is coming next year."

"What should I do if the pressure difference of variable wings is not enough? I remember that during the last meeting, I said that if the pressure difference cannot be solved, the high-pressure airflow may blow the wing tips down during the wing body expansion."

Su Guan's expression was a little confused. He was a relatively peripheral member of the Jinwu project aerodynamic team and did not know much about some core information, but major issues like this would not be kept confidential. After the problem was discovered, he and other team members worked overtime for three nights all night, and the final proposal was also unsatisfactory.

According to his understanding, the new solution can barely solve some problems, but at high altitude and high speed, the pressure coefficient changes generated by the wing expansion and retraction process are still greater than the critical value. As long as a very small disturbance occurs, the entire wing and even the entire aircraft may be torn apart.

Looking at his puzzled expression, Wang Rui answered:

"We have studied it. Aerodynamic layout cannot solve this problem. Jinwu is too big, which is better than the Russians' Figure 160. They have no experience in this field, and they can rely on purely theoretical data."

"In addition to your group, there are 6 groups in total doing the plan, and they were all rejected in the end."

"Then you said that the afternoon was the last experiment? You wouldn't tell me that Jinwu wouldn't do it anymore, right?"

Su Guan widened his eyes in surprise. He had devoted a full three years to this project. If he gave up for such a reason in the end, he would probably never be willing to do so in his life.

No, he didn't just give up, even if he changed the current design plan, he felt unacceptable.

In his heart, the golden crow with variable wings and can cruise at hypersonic speeds, and the maximum speed of Mach 2.7 is the complete golden crow. If the variable wings are given up for stability and the performance is given, it can only be considered a sparrow!

And the Sparrow, the Ugly Kingdom, has already existed, and he doesn't want to create something that others have already created.

"...I want to say that we really gave up on the variable wings. Would you rush directly into the chief engineer's office and give him a blow?"

".........Don't make such a joke, I might be able to do it."

Wang Rui stared at Su Guan's eyes tightly, trying to maintain his serious expression, but after looking at each other for a few seconds, he finally couldn't help laughing.

"Hahahahaha... Xiao Su, you're so coquettish."

"What are you thinking? This plane has long been designed with a fixed design. Variable wings are the key structure, so how can we change it casually? Our Shufei's principle is different from Fengfei. If you want to do it, you can do something that others dare not do..."

"The reason this time is said to be the last experiment is not because we want to ignore this problem, but on the contrary, it is because the problem has been solved."

Hearing this, Su Guan's eyes lit up, and then he asked:

"How to solve it? Is there a new model?"

"There is a hammer model... this thing cannot be solved through pneumatic layout optimization. We have simulated it countless times in the matrix, and the conclusions are the same."

"There is only one way to solve the problem, strengthen the strength of the material."

"You are not from the materials group, so you don't know that two weeks ago, a new material plan was sent from the Sanchi Institute, anr-ht09."

"I heard that this material was originally intended to be used in a nuclear fusion reactor. Later, people there discovered that after modifying the anti-neutron radiation component ratio, the material's strength, heat resistance and toughness have been improved - just right on the wings of Jinwu."

"After replacing the titanium alloy we are using now, although the weight has increased by about 3%, it does not affect the overall design."

"And, the wing strength is much stronger than our previous design, and the variable wing pressure difference problem that we cannot solve is nothing in front of this material."

After listening to Wang Rui's explanation, Su Guan finally breathed a sigh of relief.

However, he was also a little curious about who were the people from the Sanchi Research Institute? It has only been less than 5 years since its establishment, and the results it has almost monopolized the field of advanced materials in the entire China.

From aerospace, to large-scale machinery, to deep-sea diving equipment, to nuclear fusion, to clothing, electronics, and even food packaging, it seems that they are present.

Under the leadership of this research institute, the Chinese materials field is making great strides. In just a few years, it seems that it has completed the path of others for decades.

If this continues, will the space elevator be started in the next step?

Su Guan shook his head gently, dispelled the messy thoughts in his mind, then took a deep breath and asked tentatively:

"Brother Rui, after the wind tunnel experiment is completed, Jinwu's body will be finalized. The next step...it's time to complete the assembly and test?"

When Wang Rui heard his question, he secretly felt a little funny.

Young people are indeed much more anxious than older people like themselves.

However, there are also benefits of being anxious. If it weren't for the leadership of these young people, I might not be able to maintain my current momentum.

Thinking of this, he answered:

"Absolutely, right?"

"The Golden Crow is about to enter the production trial stage. Under our current system, this stage usually takes the least amount of time."

"After the fuselage comes out, it hits the engine again, not far from the golden crow taking off."

"I guess, at the end of the year or even the beginning of the year, we will see the first golden crow coming to the sky."

Su Guan's eyes showed a look of longing, and his eyes moved back to the roek in the distance.
Chapter completed!