Whether it is Qiao Caihong, Zhou Shaoping or Zhang Gongding who are standing.
Or Zheng Tao, Ye Duzheng and Qian Bingqiong sitting on the chairs.
Everyone at the scene felt as if they had been hit by a gust of absolute zero-degree wind in an instant, with expressions frozen on their faces.
A long time passed.
snap——
Qian Bingqiong accidentally overturned the tea cup on the table, and then he came back to his senses as if he was waking up from a dream.
He first took a deep breath, resisted the urge to rush to Xu Yun, and asked Xu Yun:
"Comrade Han Li, what did you say?"
"Shoot down the reconnaissance plane across the sea? This... do you know how terrifying the parameters of that reconnaissance plane are?"
Xu Yun nodded, pointed to Ye Duzheng beside him, and said:
"Didn't Director Ye just say that the reconnaissance plane can fly at an altitude of more than 20,000 meters, which is much more powerful than domestic fighter jets."
"As for its flight speed...if nothing else, it should be about 800 kilometers per hour?"
Qian Bingqiong suddenly shrank and blurted out a question:
"Wait a minute, Comrade Han Li, how do you know its speed?"
To know.
Although the U2 reconnaissance aircraft was put into service in 1955, it is already some years ago.
But for a long, long time.
Its existence is just some rumors about Mohu.
It wasn't until Mao Xiong used a missile to shoot down a cruising U2 in the country a year ago that this mysterious reconnaissance aircraft truly appeared in front of the world.
However, Mao Xiong has never provided the specific parameters of U2 to the rabbits. At present, even the flight speed of U2 is considered a confidential data - it is not that few people know it, but that ordinary people do not have access to this kind of data.
Qian Bingqiong looked at him with a surprised look on his face.
Xu Yun smiled calmly.
As early as he realized that the person coming was U2, he had already thought about what he should say next...or rather, what he should say.
I saw him moving his chin towards a certain direction outside the window. You could see through the window that it was the base of the previous weather Doppler radar:
"Comrade Qian Yi, don't forget, I have some experience in radar, and I can be considered an enthusiast."
"At present, if we want to discover the U2 track in China, we can obviously only rely on the shore-based radar in Fujian Province - after all, domestic reconnaissance aircraft can only come from that place."
"The alarm sounded in the factory more than three hours ago. If we include the time it took to deliver the message in Fujian Province and then divide it by the distance, we can roughly determine its speed."
"...."
Qian Bingqiong was silent for a moment and then nodded slightly.
This explanation makes sense, but most people probably wouldn't think of it.
Just the concept of shore-based radar can block many laymen.
Then he paused and continued to ask:
"Comrade Han Li, since you know the speed and height of U2, why do you still say that you can defeat U2?"
"You know, not to mention our domestic fighter jets, even various anti-aircraft missiles currently don't have the ability to shoot down U2."
"If you want to shoot down the U2 reconnaissance plane, you must come up with a more advanced weapon, right?"
"Could it be...that you have an optimization plan to increase the height of a fighter jet?"
Xu Yun couldn't help but glance at Qian Bingqiong again.
I'm afraid Qian Bingqiong didn't even notice it himself.
The questions he raised at this time were not at all like the business scope of a boilermaker...
At the same time, Ye Duzheng beside him did not make any corrections, which was obviously enough to explain one thing——
These two fish were put into plastic bags.
certainly.
What Qian Bingqiong said at this time was not entirely true.
in real history.
In fact, Rabbit has already introduced SAM-2 surface-to-air missiles from Mao Xiong and formed a legendary missile force simply called the Second Battalion.
Even if Xu Yun hadn't appeared, the rabbits would have shot down the next U2 in a little more than a year.
And in the next five years.
Rabbit shoots down a U2 reconnaissance plane every other year and captures two pilots.
How exaggerated is this achievement?
It is so exaggerated that a total of 7 U2s were shot down in the world, and the Rabbits owned five of them.
Later, the rabbits used the wreckage of these five planes to piece together a complete aircraft body, which was displayed at the Military Expo for tourists to visit.
In 2017, Rabbit even invited Veralia Johnson, the son of late U2 designer Kelly Johnson from her second marriage, to visit Junbo.
I don’t know if it was because her father didn’t leave any inheritance to her, but Villaria Johnson was still smiling happily beside the U2 wreckage...
But on the other hand.
A year later, U2 has actually detected a lot of useful image information, which has provided great help for analyzing the research progress of the rabbits across the sea.
For example, when the rabbits' theoretical research is coming to an end.
A certain Melody with an open mind almost jumped over the wall. If Sui Zong didn't trust the intelligence from across the sea, the rabbits' nuclear base might have suffered a serious blow.
But now that there is a variable like Xu Yun, some things may be different...
Think of this.
Xu Yun couldn't help but raise the corner of his mouth with a smile like a fisherman who always buys good fish:
"Yes, Comrade Qian Yi, in terms of flight altitude, the U2 reconnaissance aircraft is indeed the first in the world."
"Not to mention the J-6, even the MiG-17, the world's top fighter, has a big gap between the flying altitude of the U2."
"It is very complicated to optimize the flight height of fighter jets. Whether it is pressure-resistant materials or ramjet engines, it cannot be solved with a drawing or an optimization plan."
Hearing Xu Yun's words.
Qian Bingqiong nodded subconsciously.
Students who were fighter jets in their previous lives should all know this.
The navigation altitude of fighter jets has always been a very complex area.
If you keep climbing at a small angle, you will find a situation as the air pressure decreases:
The airspeed is getting lower and lower, but the actual speed has reached a high level, and finally...
Enter Death's Coffin Corner.
In this corner.
The air pressure is so low that the lift is insufficient, but the throttle is already at the end.
At this time, the airframe is unable to accelerate, will stall when decelerating, and will stall if the lever is forcibly pulled.
If you accumulate enough speed to jump at a large angle, you will immediately stall and fall when you reach the highest point.
Therefore, we want to increase the flying altitude of an airplane.
In addition to the engine, there are a lot of modules that need to be considered, including airfoils, body materials, fuel injection, etc.
In a sense.
It's almost like redesigning an airplane.
And it takes a long, long time for the aircraft to go from design drawings to actual combat.
So even if Xu Yun could come up with an optimization or design drawing, even if his superiors trusted him immensely, the plane would not be able to land normally in a short period of time.
Think of this.
Qian Bingqiong felt that he had guessed Xu Yun's thoughts:
"Oh, I get it."
"So Comrade Han Li, you mean... that anti-aircraft missiles can be optimized?"
Unexpectedly, Xu Yun shook his head decisively and denied:
"...I'm sorry, neither."
"To tell you the truth, I know nothing about missiles, except for the word "bullet"."
Qian Bingqiong:
"?!"
What Xu Yun said is indeed true.
Missile research and development.
This is a very important profession in later generations.
Let’s not talk about the barriers between military industry and civilian use.
Xu Yun's majors such as engineering drawing, cybernetics, inertial navigation, and aircraft design are not something that Xu Yun can easily talk about.
The only thing Xu Yun has in common with the missile major is that he has a relatively in-depth study of advanced mathematics and a little research on various computer programs.
So if you ask Xu Yun to take the initiative and come up with some corner optimization plans, to be honest, it is still possible - no matter whether it can succeed or not, at least you can try it.
But I want Xu Yun to directly come up with a new missile model that is capable of actual combat...
joke.
It's better to expect him to update Chapter 20 tomorrow.
Seeing that both missiles and fighter jets were rejected by Xu Yun, Qian Bingqiong's expression became more and more confused:
"Then Comrade Han Li, what you mean by defeating U2 is..."
Xu Yun smiled mysteriously at him and pointed to the sky with his finger:
"Comrade Qian Yi, apart from fighter jets and missiles, do you think there is anything else that can reach the sky?"
Qian Bingqiong was stunned again.
Something that can reach heaven?
This is too much.
Birds can fly to the sky.
Balloons can go up to the sky.
The Type 59 tank, which was launched the year before last, is said to be able to take to the skies in the future...
Suddenly.
Qian Bingqiong suddenly thought of something, and raised his head and looked at Xu Yun in surprise:
"Comrade Han Li, are you talking about... satellites?"
As the current leader in the domestic atomic energy industry.
Qian Bingqiong's understanding of many front-end projects is much higher than that of Ye Duzheng, even Lao Guo and Lu Guangda.
So he knew it very well.
Although satellite research and development is still in its infancy.
But in future planning, satellite weapons are indeed a possible technology.
This technology is even higher than the radar research before the advent of weather Doppler radar, but the project was shelved due to the reasons mentioned before.
And unlike fighter jets.
Although the satellite design is equally complex, it is obviously much easier than the fighter jet - at least there is no need to consider the wind tunnel test. This step alone is enough to win...
However, just when Qian Bingqiong thought he had guessed the answer correctly, Xu Yun shook his head again:
"Comrade Qian Yi, I'm not talking about the satellite, but it's very, very close to the satellite - both conceptually and physically."
A question mark immediately appeared on Qian Bingqiong's face:
"?"
Then Xu Yun coughed lightly, turned to look at Ye Duzheng, and asked him:
"Director Ye, you are a meteorological expert, so you should know that the atmosphere will show different characteristics with different altitudes, and have different names, right?"
Ye Duzheng nodded, this was his area of expertise:
"Yes, the so-called atmosphere refers to the layer of mixed gases surrounding the earth due to gravity."
"Currently, there are a total of five academic levels based on the gas structure from the near surface to the sky."
"That is, the troposphere, stratosphere, mesosphere, warming layer and exosphere."
"Current civilian airliners generally fly in the upper troposphere, while military fighter jets fly in the area where the stratosphere and troposphere meet."
Hear Ye Duzheng's introduction.
Xu Yun subconsciously wanted to snap his fingers.
But as soon as he made this action, he was stimulated by the pain in his fingers and grinned:
"Oh, it hurts, it hurts..."
Ye Duzheng and Qian Bingqiong:
"...."
As we all know.
The earth's atmosphere is divided into five layers according to its temperature structure. From bottom to top are the five terms introduced by Ye Duzheng.
The troposphere is the lowest layer of the atmosphere closest to the ground and the lowest layer of the atmosphere.
The height is about 10 to 12 kilometers from the ground to the sky. At Mohu Point, it means that the troposphere is under 10,000 meters of altitude.
The troposphere is a very shallow layer compared to the entire atmosphere, and its thickness is less than 1% of the entire atmosphere.
But due to the effect of earth's gravity.
The troposphere concentrates about 3/4 of the atmospheric mass, more than 90% of the water vapor mass, and almost all aerosol particles.
Water vapor near the ground is transported upward through convection movement, and it easily forms clouds and causes rain.
Therefore, the main weather phenomena in the atmosphere occur in this layer, so the troposphere is most closely related to human activities.
The area above the troposphere is the stratosphere.
The stratosphere is also called the stratosphere, and the local height is about 7-12km to 50-65k... which is about 60,000 meters.
This chapter is not over yet, please click on the next page to continue reading! This layer contains ozone, which can absorb ultraviolet rays so that living things on the earth will not be directly exposed to the strong ultraviolet rays in the sun.
in this layer.
The atmosphere mainly flows in the horizontal direction, and the movement in the vertical direction is weak, so the air flow is smooth and there is almost no up and down convection.
As for the subsequent middle layer, the warming layer and the exosphere, we will not go into details. The area above them is the interstellar space.
By the way.
The ionosphere that many people are familiar with is actually the name of a special area between the mesosphere and the warming layer.
The way to distinguish it is physical electromagnetic effect, which actually has nothing to do with atmospheric standards.
As for the altitude of the satellite...that's more complicated.
Because satellites can be divided into three situations based on their actual flight altitude:
low orbit satellite,
medium orbit satellite,
and high-orbit satellites.
Everyone's traditional understanding...that is, satellites that rotate in space are basically high-orbit satellites, 36,000 kilometers above the ground.
But in fact.
The number of satellites in this part of the area is not the largest.
The largest number of satellites are generally located in the mid-orbit area. For example, the height of the Rabbit space station is about 400 kilometers.
Low orbit is generally the operating range of reconnaissance satellites. For example, keyhole satellites can often drop to 120 kilometers.
alright.
His eyes returned to reality.
Looking at Ye Duzheng who was talking eloquently, Xu Yun drew a range with his hand and said to everyone:
"Yes, it is not difficult to see from Director Ye's introduction that there is actually a special space in the lower stratosphere."
"Planes can't get up there, satellites can't get down there, and only a handful of rockets occasionally pass through there."
"But in fact, the air in the stratosphere is much thinner than the troposphere."
"The content of water vapor and dust there is very small, so there are very few weather phenomena. It can be said that there is no wind or rain."
"So Comrade Qian Yi, do you think there is such a possibility..."
Say it.
Xu Yun straightened his index and middle fingers and made a swimming movement with his feet in the air:
"That is, launching an aircraft into the stratosphere that can remain stationary for several days. The aircraft is loaded with several special missiles."
"When U2 was about to fly below the aircraft, the missile on the aircraft fell, and then..."
"Boom!"
"...."
Xu Yun was quite happy when he said this, but Qian Bingqiong and Ye Duzheng opposite him did not seem particularly excited.
After a while.
Ye Duzheng spoke slowly:
"Comrade Han Li, the scene you mentioned is indeed very attractive, but..."
"With our current technology, it seems a little difficult to achieve this effect, right?"
I saw Ye Duzheng spreading his left hand, with the thumb of his left hand bent into the palm of his hand, and the index finger of his right hand tapped the thumb a few times:
"First of all, the stratospheric aircraft you mentioned is a big problem. Our current aircraft cannot fly up there. What can you use to send missiles to the stratosphere?"
"Secondly, even if we really get an aircraft for you, how can we know the specific trajectory of the U2 reconnaissance plane?"
"Finally, how can you guarantee that a missile dropped from an altitude of at least several thousand meters, but the actual difference may reach 10,000 meters, can hit the U2 reconnaissance aircraft?"
Ye Duzheng's question is very sharp and very realistic.
To know.
Currently, no country or region in the world can launch aircraft into the stratosphere - except via rockets.
Even across the sea and the furry bear.
Not to mention that if you want to launch missiles, you must use fire control radar.
The wave frequency of fire control radar is three millimeter x microwave, which is the same as the wave band of detection radar.
According to the information disclosed by Mao Xiong.
The U2 reconnaissance aircraft has three detection radars. After detecting the fire control radar signal, it can quickly increase its altitude within 30 seconds.
The real core reason why Mao Xiong was able to take down that U2 was not simply relying on technology, but because of the existence of a sixth man:
Their intelligence aircraft detected through various channels very early on, and Peshawar is one of the main bases for U2 high-altitude reconnaissance aircraft.
So they sent an agent named Peter to enter the Peshawar Air Force Base as a handyman.
Peter maneuvered the U2 high-altitude reconnaissance on the tarmac to make its actual flight altitude inconsistent with the displayed altitude, and finally allowed Mao Xiong to successfully shoot down U2.
But the problem is that the rabbits these days cannot do this at all, but the pressure from the enemy agents in the mainland is even greater.
Therefore, in Ye Duzheng's opinion.
Xu Yun's so-called plan is completely wishful thinking.
If it were not for Xu Yun’s contribution.
Ye Duzheng even wanted to wave his hand in boredom and say goodbye.
Qian Bingqiong beside him also looked a little disappointed. After all, Xu Yun's plan was too unreasonable.
And just when Ye Duzheng was about to finish the scene with some words, Xu Yun spoke:
"You are wrong, Director Ye, we are fully capable of doing this."
Ye Duzheng suddenly raised his head in shock and looked at Xu Yun.
At this time, Xu Yun seemed to be responding to Ye Duzheng's question. He first raised the index finger of his left hand:
"The first question is, yes, currently neither our fighter jets nor commercial airliners can fly to the stratosphere."
"But Director Ye, I'm afraid you have forgotten that we actually have another very primitive tool that has the possibility of doing this."
Ye Duzheng blinked and asked subconsciously:
"What tool?"
Xu Yun turned his head when he heard this, pointed to the balloon that Fang Zhong was wrapping around his index finger and said:
"Balloon, or... airship."
Ye Duzheng's voice rose a little higher:
"airship?"
"That's right."
Xu Yun nodded, made another gesture to measure his height, and explained:
"Director Ye, you are a meteorological expert, so you should be familiar with the relationship between altitude and air pressure."
This chapter is not over, please click on the next page to continue reading! "Generally speaking, in an area with an altitude of 30km, the atmospheric pressure is about 10hpa, and the atmospheric pressure per square meter of the vacuum container is about 0.10 tons, which is 100 kilograms."
"If it is filled with helium buoyancy, the pressure difference between its inside and outside will become smaller, and the requirements for materials will be further reduced."
"So if the airfoil lift is designed well and the materials are selected, I think it is entirely possible for the airship to rise to the height of the stratosphere."
Xu Yun's tone was very determined.
Because when he was studying in his previous life, he had participated in the first "Flying Cup" National Future Aircraft Design Competition and received a good ranking.
This kind of design competition is not as simple as drawing a picture or building a model. It requires designing specific principles, materials and even simulating a lift track.
Finally, the final ranking must be announced through the guidance and comments of four academicians of the Academy of Engineering, Academician Huang Ruisong, Academician Liu Yongcai, Academician Huang Wenhu, and Academician Li Chunxuan.
Later, the University of Science and Technology also turned Xu Yun's airship blueprint into a physical object, and it successfully stayed in the stratosphere for three days.
"..."
Then Ye Duzheng thought for a moment and asked Xu Yun:
"Comrade Han Li, let me ask you another question - what material do you envision for the capsule?"
Although Ye Duzheng is not an expert in aircraft design, he has had a lot of experience with equipment such as weather balloons.
As the saying goes.
I have never eaten pork, but I have seen pigs running away.
Ye Duzheng didn't know much about the power structure, but he could barely make a judgment about the material - ordinary materials would definitely not be able to withstand the pressure difference in the stratosphere.
"What is the material of the capsule..."
Xu Yun recalled for a while and quickly said:
"The capsule material must have the characteristics of light weight, high strength, high thermal conductivity and high toughness, so polyester fiber and polyester are definitely needed."
"In addition, at least a fluorine film aluminum layer is required for heat conduction - these should be produced at the current domestic industrial level, but the requirements for the remaining braided load-bearing layer are relatively high."
"It requires a thin and strong pore film for gas exchange. The material can withstand high pressure. The pore diameter should preferably reach the micron level, and the number should be at least hundreds..."
"Of course, if we don't have this kind of material, we can think of other ways during the design process..."
Mention braided load carrying layer.
Xu Yun's brows couldn't help but frown slightly.
From a design perspective, this thing is a very important part of the stratospheric airship, and it can even be said to be the lifeblood.
Whether the airship can rise to the corresponding area as planned and whether the structure is not damaged by the pressure difference largely depends on this material.
So despite what he said, he could think of other ways. In fact, if this thing does not meet the standards, many subsequent links will be affected.
But there is no way.
If he says that he is powerless at this step, then Xu Yun's next plan will be completely scrapped.
However, just when Xu Yun frowned.
Qian Bingqiong on the side said very firmly:
"Comrade Han Li, please continue."
Xu Yun was stunned for a moment, and subconsciously looked up at Qian Bingqiong.
After raising his eyes.
Then he met Qian Bingqiong's extremely determined gaze.
This look was somewhat familiar to Xu Yun, because Lao Guo had shown the same look before.
Xu Yun:
"????"
What's going on?
To know.
The craftsmanship required for the braided load-bearing layer is indeed a very difficult problem for the current rabbits.
Even if the superiors now decide to produce a braided load-bearing layer, it will probably take several months - this is the fastest time assuming the rabbits have the production technology.
Could it be...
Like the memory module of the previous 109-A machine, do the rabbits still have something in their warehouse that has not been decrypted by later generations?
Looking at Xu Yun with a surprised look on his face.
Qian Bingqiong's heart at this time was actually quite subtle.
Is this a coincidence?
The moment I heard the related properties of the braided load-bearing layer described by Xu Yun.
Qian Bingqiong then thought of the batch of gas exchange membranes from Factory 504 that could not be used because their parameters had been manipulated.
That's right.
Gas exchange membrane. (Quack, I didn’t expect that. In fact, it was hinted at in that chapter)
The gas exchange membrane that Xu Yun mentioned as a braided load-bearing layer has all the characteristics required, and the accuracy will only be higher, not lower - this is a gas exchange membrane used for centrifugal enrichment of uranium!
The number of gas exchange membranes in that batch was approximately more than 3,000, and they were all being shelved in Factory 504 due to parameter errors.
Even the capital was at a loss as to how to deal with this batch of gas exchange membranes, but now Xu Yun actually gave such a suitable place to use it?
What a coincidence...
Then Qian Bingqiong took a deep breath and continued to signal to Xu Yun:
"Comrade Han Li, please continue."
Qian Bingqiong repeated "Please continue" for the second time.
Finally, Xu Yun's mind was brought back to reality.
So he took a deep breath and continued following his original train of thought:
"After solving the problems of heat conduction and gas exchange, the only thing left is to strengthen the toughness of the capsule."
Qian Bingqiong nodded:
"Then what materials are needed for this step?"
Xu Yun glanced at him and a few words popped out of his mouth:
