Great Power Technology.

Chapter 463 The Golden Crow Wind Tunnel Experiment Completed
Sichuan and Shushan Mountains.

A peregrine falcon glides silently through the air, its eyes warily scanning the glade below, waiting for today's lunch.

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 blessing of its extreme flight speed, it still easily reached the top position on the Raptor list.

It is now September, and according to the habits of the peregrine falcon, it should have already set off to fly to Yangcheng thousands of miles away for the winter at this time, but it has no intention of leaving at all. Instead, it is flying 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 the target and flying into this mountain by accident, after several months of observation, it has gradually discovered the difference between this mountain and other peaks it has flown.

Here, most of the mountains are exposed—even if they are not exposed, there are only trees that have just grown and are not tall.

On the contrary, the prey in this mountain forest is abundant and stupid. Unlike the cunning prey it has chased, the crows here, the pheasants here, the voles and rabbits here are just As if they have never learned how to survive, they will always swarm out of the forest at a certain point and be exposed to their sharp claws.

And this kind of time is often the time to feast on yourself.

It doesn't know what caused all this. After all, it has lived in the air all year round and walked through the turbulent currents. It can't feel the abnormality felt by those prey. It only knows that this kind of commotion will happen again soon. .

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

Afterwards, countless birds flew up from the forest, and voles and rabbits also rushed out of their caves. The peregrine falcon folded its wings and whizzed down with the strong wind. Before the rabbit came back to his senses, a black shadow passed by.

Afterwards, the hare lay limp on the ground, its head completely crushed by the sharp claws of the peregrine falcon.

A few seconds later, the peregrine landed leisurely and began to enjoy this easy lunch.

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

This is the Chuanshu JF-22 large-scale wind tunnel experiment base. Wang Rui and Su Guan had just finished the morning experiment. When they walked out of the experiment base to let the wind go, they happened to see the peregrine falcon hunting.

"It's 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 that he didn't take out his mobile phone to take a picture when he noticed this 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. But this kind of bird is actually rare in our country. It is slightly more common in the southeast and north. It is a good sign to see it here. gone."

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

"If you want to take pictures, watch it earlier next time. In another month, if the temperature continues to turn cold, it will definitely leave. No matter how much food there is, it can't hold up to heavy snowfall."

"Is it still snowing here?"

Su Guan asked curiously.

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

"I don't know who said that the snow seeping into the ground will affect the stability of the wind tunnel, and the leader at that time was also an idiot, he believed whatever he said, it was cold, and he brought hundreds of us brothers , humming and running outside to shovel snow.”

"At that time, this place was still barren, and large-scale equipment could not come in. It was all manual work. We shoveled while the sky fell."

"It's absurd to think about it now. Now that more than ten years have passed in a blink of an eye, it's interesting to look back."

"At that time, there were still many living creatures in the snow. We caught a yellow-skinned animal—did you know? The yellow-skinned animal will change its skin in 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 weasel family, and the weasel family is basically cute."

"But having said that, does snow really affect the wind tunnel? We are now in a critical period of testing. Don't let a snowstorm affect the accuracy of the data, then it will be over."

Wang Rui shook his head and replied:

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

"The next time such a high-intensity test is estimated to wait until the spring of next year."

"What about the problem of variable wing pressure difference? Leave it alone? I remember that in the last meeting, I said that if the pressure difference cannot be solved, the high-pressure airflow during the wing body deployment process is likely to blow the wing tip to pieces."

Su Guan looked a little puzzled. He was a relatively peripheral member of the aerodynamic group of the Golden Crow Project. He didn't know much about some core information, but such a major issue would not be kept secret. After the problem was discovered at that time, he and his The other team members worked overtime for 3 nights together, and the final proposal was not satisfactory.

According to his understanding, the new solution can barely solve part of the problem, but at high altitude and high speed, the change in pressure coefficient produced by the wing unfolding and retracting process is still greater than the critical value. As long as a very small disturbance occurs, the entire wing may , and even the entire plane was shredded.

Seeing his puzzled expression, Wang Rui answered:

"We've researched it, and the aerodynamic layout can't solve this problem. The Jinwu is too big, a circle bigger than Maozi's Tu 160. They have no experience in this field, and what they can rely on is purely theoretical data."

"In addition to our group, we have a total of 6 groups working on plans, and all of them were rejected in the end."

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

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

No, not just giving up, even changing the current design plan, he finds it unacceptable.

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

As for the sparrow, Ugly Country already has it, and he doesn't want to build something that others have already built.

".I want to say that we have really given up on the variable wing. Will you rush to the chief engineer's office and give him a hammer?"

"...Don't make such a joke, maybe I can really do it."

Wang Rui stared closely at 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 but burst out laughing.

"Hahahahaha Xiao Su, you are too cute."

"What are you thinking about? This aircraft has already been designed. The variable wing is the key structure. How can it be changed casually. The principle of our Shufei is different from that of Fengfei. If we want to do something, we must do something that others dare not do."

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

Hearing this, Su Guan's eyes lit up, and then he asked:
"How did you solve it? Is there a new model?"

"The model with a hammer 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, to increase the strength of the material."

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

"I heard that this material was originally intended to be used in nuclear fusion reactors. Later, the people over there discovered that after modifying the antineutron radiation composition ratio, the material's strength, heat resistance and toughness have all been improved—just right It can be used on the wings of the Golden Crow."

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

"Also, the strength of the wing is much stronger than our previous design, and the problem of variable wing pressure difference that we can't solve is nothing compared to this material."

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

But he is also a little curious, who are the people in the Sanchi Research Institute?It has only been established for less than 5 years, and its achievements can almost be said to have monopolized the entire advanced material field 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 present.

Under the leadership of this research institute, the field of Chinese materials is making great strides forward. In just a few years, it seems that they have gone the way of others for decades.

If things go on like this, isn't the space elevator going to be built in the next step?
Su Guan shook his head lightly, dispelling the messy thoughts in his mind, then took a deep breath, and asked tentatively:

"Brother Rui, after the wind tunnel experiment is completed, the body of the Golden Crow is finalized. The next step is the assembly test, right?"

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

Young people are indeed much more anxious than old people like me.

However, there are advantages to being anxious. If it weren't for the drive of these young people, I'm afraid I wouldn't be able to maintain my current momentum.

Thinking of this, he opened his mouth and replied:

"Almost so."

"Jinwu will soon enter the production and trial production process. Under our current system, this process generally takes the least time."

"After the fuselage shell comes out, it hits the engine again, and it's not far from Jinwu's takeoff."

"I estimate that by the end of the year at the latest, or even the beginning of the year, we will be able to see the first Golden Crow take to the sky."

Su Guan's eyes showed longing, and his eyes moved to the peregrine falcon in the distance again.

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

(End of this chapter)