Chapter 463 The Jinwu Wind Tunnel Experiment Is Completed

Sichuan-Sichuan Mountains.

A peregrine falcon is gliding quietly in the sky, its eyes scanning the glade 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 centimeters and its wingspan reaches an astonishing 120 centimeters. Although this size is not large among the world's raptors, it is more than 300 kilometers away. With the support of the ultimate flight speed, it still easily climbed to the very top position on the raptor list.

It is September now. According to the peregrine falcon's habits, it should have already left for Yangcheng, thousands of miles away, to spend the winter. However, it has no intention of leaving at all. Instead, it flies in the cold wind that has gradually turned cold. Round and round, quietly waiting for a certain moment to arrive.

Yes, it is a wise bird.

After chasing its target and flying into this large mountain by chance, after several months of observation, it has gradually discovered the differences between this mountain and other peaks it has flown over.

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

In contrast, there are many prey in this mountain forest, and they are also extremely stupid. Unlike the cunning prey it has chased, the crows here, the pheasants here, the voles and rabbits here are just like this. As if they had never learned how to survive, they would always swarm out of the forest at a certain point in time, exposing themselves to their sharp claws.

And at this time, it is often the time for me to feast.

It doesn't know what caused all this. After all, it lives in the air and travels through turbulence all year round. It can't feel the abnormalities that its prey feel. It only knows that such a commotion will happen again soon. .

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

Then, countless birds flew up from the forest, and the field mice and rabbits also rushed out of their caves. The peregrine falcon folded its wings and howled down with the strong wind. Before the rabbit came to his senses, a dark shadow passed by.

Then, the hare collapsed to the ground, its head completely crushed by the peregrine falcon's claws.

A few seconds later, the peregrine falcon landed leisurely and began to enjoy its effortless lunch.

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

This is the Sichuan-Sichuan JF-22 large-scale wind tunnel experimental base. Wang Rui and Su Guan had just finished the morning experiment. When they walked out of the experimental base to enjoy the wind, they happened to see the scene of peregrine falcons hunting.

"It's so fast. My eyes can't keep up with its movements. This must be the fastest bird in nature, right?"

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

Wang Rui on the side nodded and replied:

"It is indeed the fastest bird in the world - it is also the national bird of Arabia. However, this kind of bird is actually very rare in our country. It is slightly more common in the southeast and north. It is a good sign to see it here. ”

"I heard from other colleagues that this peregrine falcon has been here since two months ago. It seems to have learned some rules. As soon as our wind tunnel was opened, the noise and vibration came out, and other animals were frightened and scrambled everywhere. When it runs, it comes out to hunt.”

"If you want to take a photo, keep it early next time. If the temperature continues to get colder in another month, it will definitely leave. No matter how much food there is, it won't be able to withstand the heavy snowfall."

"Will it still snow here?"

Su Guan asked curiously.

"It's not snowing. The altitude here is high, and it's relatively close to the sea. Every year, there will be one or two snowfalls in the cave. When the conditions were poor in the past, we were sent out to remove snow - remove snow from the mountains, can you believe it? ?”

"I don't know who said it. Snow seeping into the ground will affect the stability of the wind tunnel. And the leader at the time was also a fool. He just believed whatever he said. It was a cold day, and he took hundreds of us brothers with him. , grunting and running outside to shovel the snow."

"At that time, this place was still very deserted, and large equipment couldn't get in. It was all done manually. As the sky came down, we shoveled at the same time."

"It's quite absurd when I think about it now. Now more than ten years have passed in the blink of an eye. Looking back, it's actually quite interesting."

"There were a lot of living creatures in the snow at that time. We once caught a yellow-skinned bird - did you know? The yellow-skinned baby will change its skin in the winter, and its fur is snow-white, not to mention how cute it is."

Su Guan on the side nodded slightly and replied:

"I've seen this in a video. Huang Pizi is from the mustelidae family, and most of the mustelids are cute."

"But having said that, does snow really have an impact on the wind tunnel? We are in a critical period of testing now. If a snowfall affects the accuracy of the data, it will be over."

Wang Rui shook his head and replied:

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

"The next such high-intensity test will probably have to wait until the spring of next year."

"What to do about the problem of variable wing pressure difference? Leave it alone? I remember during the last meeting, I said that if the pressure difference cannot be solved, the high-pressure airflow will probably blow the wing tip into pieces during the expansion of the wing body."

Su Guan looked a little confused. He was a relatively peripheral member of the aerodynamic team of the Golden Crow project and did not know much about some core information. However, major issues like this would not be kept confidential. After the problem was discovered, he and his The other team members worked overtime for three nights, and the final plan was not satisfactory.

According to his understanding, the new solution can barely solve part of the problem. However, at high altitudes and high speeds, the pressure coefficient changes caused by the wing expansion and retraction processes are still greater than the critical value. As long as a minimal disturbance occurs, the entire wing may collapse. , even the entire plane was torn into pieces.

Seeing his confused expression, Wang Rui answered:

"We have studied it, and the aerodynamic layout cannot solve this problem. The Golden Crow is too big, much larger than Maozi's Tu 160. They have no experience in this field, so all they can rely on is purely theoretical data."

"Except for our group, we had a total of six groups making plans, but in the end they were all rejected."

"Then you still said that this afternoon is the last experiment? You won't tell me that Jinwu won't do it anymore, will you?"

Su Guan's eyes widened in surprise. He had devoted three years to this project. If he finally gave up for such reasons, he would probably never be willing to do so in his life.

No, not only giving up, but even changing the current design plan, he found it unacceptable.

In his mind, the Golden Crow with variable wings, capable of hypersonic cruise, and a maximum speed of Mach 2.7 is the complete Golden Crow. If the variable wings and high-speed performance are given up for stability, then it can only be regarded as a sparrow!

As for Sparrow, Chouguo already has one, and he doesn’t want to build something that others have already built.

".If I say that we really gave up the variable wings, will you rush directly to the chief engineer's office and give him a hammer?"

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

Wang Rui stared closely into Su Guan's eyes, 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 are so cool."

"What are you thinking about? The design of this aircraft has been finalized for a long time. The variable wing is the key structure. How can it be changed casually. Our principles at Shufei are different from Fengfei. If we want to do something, we have to do something that others don't dare to do."

"The reason why this is the last experiment is not because we want to ignore this problem. 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 that cannot be solved through aerodynamic layout optimization. We have simulated it countless times in the matrix, and the conclusion is the same."

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

"You are not in the materials team, so you don't know that a new material plan, ANR-HT09, was sent from Sanchi Research Institute two weeks ago."

"I heard that this material was originally intended to be used in nuclear fusion reactors. Later, people there discovered that after modifying the proportion of anti-neutron radiation components, the strength, heat resistance and toughness of the material were improved - just right It can be used on the wings of the Golden Crow."

"After replacing the titanium alloy we currently use with this material, although the weight increases by about 3%, it does not affect the overall design."

"Moreover, the wing is much stronger than our previous design. The problem of variable wing pressure difference that we cannot solve is nothing at all in the face of this material."

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

But he was also a little curious, who were the people at Sanchi Research Institute? It has been established for less than 5 years, and the results it has produced can almost be said to have monopolized the entire field of advanced materials in China.

From aerospace, to large machinery, to deep-diving equipment, to nuclear fusion, to clothing, electronics, and even food packaging, they seem to be everywhere.

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

If this continues, won't the next step be to build a space elevator?

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

"Brother Rui, after the wind tunnel experiment is completed, the Golden Crow's body is finalized. The next step is to complete the test, right?"

Hearing his question, Wang Rui secretly felt a little funny.

Young people are indeed much more impatient than older people like me.

However, there are advantages to being anxious. If it weren't for the leadership of these young people, I might not be able to maintain the momentum I have now.

Thinking of this, he answered:

"Absolutely."

"Jinwu is about to enter the production and trial production stage. Under our current system, this stage usually takes the least time."

"After the fuselage shell comes out, it hits the engine, and it's not far from the time when the Golden Crow takes off."

"I estimate that we will see the first Golden Crow take flight by the end of next year at the latest, or possibly even early next year."

There was a look of longing in Su Guan's eyes, and his gaze moved back to the peregrine falcon in the distance.

There, the peregrine falcon had eaten and drank enough. After finally sharpening its claws, it flapped its wings slightly and stabbed straight into the clear sky.