The First Thousand and Seventy-Six Chapters Successfully Developed the Recovery Cabin

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The first thousand and seventy-six chapters of the successful development of the recovery cabin

But no matter what, everyone's enthusiasm is still quite high, and Zhao Zhongyao is naturally unwilling to discourage everyone's enthusiasm. So, he just put these 'works' in his office.

Zhao Zhongyao naturally dismissed the image of the spaceship designed by these people. Of course he himself knew what the spaceship should be designed to look like.

In fact, the spacecraft in the manned space program is just a recovery capsule. Since it is to be recovered, it should of course be designed in a circular shape. Because, only a round shape will be relatively stable when flying in the air.

However, when the recovery capsule falls from a high altitude to the surface of the earth, its speed will become faster and faster due to the acceleration of gravity. At this time, the outside of the recovery cabin will have to withstand the high temperature of thousands of degrees. If the outer material of the recovery cabin is not strong enough, it will definitely not be recycled successfully. When the high temperature generated by the friction between the recovery cabin and the atmosphere is enough to melt the recovery cabin.

Therefore, to develop a recovery cabin, the first thing is to find a super high temperature resistant metal material. Of course, during the recovery process of the entire recovery module, its speed is constantly reduced. This requires several deceleration parachutes on the recovery module, which are all design tasks that need to be completed when designing the recovery module.

The key of the satellite recovery system is the satellite parachute, and its development technology is an extension of the aviation parachute technology, but it is not the same. The satellite return capsule returns in orbit, with high parachute opening height, fast speed, heavy recovery load, harsh environmental conditions, complicated working procedures and control, and strict weight and volume restrictions of the system. There are three occasions and methods for recovering satellites. One is in the air, hooked from the plane to the string of the satellite's parachute.

This recycling method was adopted early in the United States. The second is on land, where the parachute makes the satellite land at a speed of several meters per second. This method is commonly used in my country and the former Soviet Union. The third is at sea, the satellite lands on the sea surface with a parachute, floats on the water with the help of a sealing device, and releases seawater dye, and ships and aircraft take back the satellite.

The high-altitude recovery test is an important test to verify the aerodynamic retarder, that is, the parachute recovery system. The recovery system model weighing hundreds or even thousands of kilograms dropped by a sounding rocket or an airplane floats to the ground by a parachute. If the deceleration system fails, the recovery material will accelerate from a high altitude and fall to the ground. For launch vehicle testing,

When the recovered data capsule is only 1.5 seconds away from the ground, the parachute can be ejected and opened in sequence. In order to further study the recovery technology of the rocket and ensure the success of high-altitude recovery, the arrow uses a speed reduction device combined with a speed brake and a parachute. When the rocket reaches near the apex of the trajectory, the arrow and the rocket body are automatically separated, and the speed brake installed on the recovery cabin is simultaneously opened.

During the descent of the arrow, due to the aerodynamic force, the tip of the arrow falls steadily towards the ground. When the arrow descends to a distance of several kilometers from the ground, a parachute will automatically pop up from the recovery cabin. After the drogue parachute is opened, the descending speed of the arrow slows down significantly, and then a large main parachute is pulled out from the recovery cabin by the drogue parachute. After the main parachute is opened, the arrow takes the drogue parachute and the main parachute to land slowly to the ground, with a landing speed of about 6 m/s. Only when some of the above-mentioned technical requirements are met, it is possible to develop the recovery cabin.

Zhao Zhongyao is already very familiar with the recovery cabin in the world he was alive. He knew that the recovery modules developed by the aerospace powers in the world before his death were all in the shape of arrowheads, not true circles.

The reason why it is designed in the shape of an arrow is because when the spacecraft falls into the atmosphere at a high altitude, due to its high speed, it will generate thousands of degrees of high temperature when friction occurs between it and the atmosphere. Such a high temperature would melt even ordinary steel.

The scene where we see meteors across the sky is the result of meteors being melted in the air. Of course, the speed of meteors entering the atmospheric chamber is much faster than the speed of the recovery cabin. After all, meteors fly to the earth from far away space, and their initial velocity is very fast. When it falls to the earth, its speed is even faster. Generally speaking, the speed of a meteor when it reaches the sky above the earth can reach a speed of 20,000 kilometers per hour.

The speed at which the return capsule falls into the atmosphere is generally only a few hundred meters per second. Far below the speed of a meteor. But even if this is the case, it will generate extremely high temperatures with the atmosphere. If the return capsule does not have insulation materials, it will still burn down quickly.

Zhao Zhongyao also knew a lot about the aerospace technology of the era before his death. He could of course also design a recovery pod in the shape of a bullet. But he feels that such a recovery capsule has a disadvantage, that is, during the recovery process, the flight trajectory of the recovery capsule may be unstable. If it is designed as a circle, the whole flight process will be relatively stable.

Zhao Zhongyao knew that in his lifetime, the reason why the recovery module was designed in the shape of a bullet was for the safety of the astronauts.

Because when the recovery capsule falls to the ground, it will rub against the atmosphere and generate extremely high temperatures. And the most severe friction with the atmosphere is of course the bottom of the recovery cabin. Therefore, the bottom of the recovery cabin must be designed in the shape of an arrow. Because only if it is designed in the shape of an arrow, when the recovery capsule returns to the ground, the high temperature generated by friction with the atmosphere will not harm the astronauts in the recovery capsule.

And Zhao Zhongyao knew that he didn't need such a design, he could use his own nanotechnology to develop a high temperature resistant alloy steel. Using this kind of nano-alloy steel, the whole design is used as the shell of the recovery cabin.

In this way, it is not necessary to design the recovery cabin into a bullet shape, and it can also avoid being damaged by the atmosphere when flying in the atmosphere.

The high temperature generated by friction melts.

Zhao Zhongyao has studied nano-alloy materials before. This super heat-resistant material can withstand a high temperature of 6,000 degrees. This temperature is much higher than the temperature generated by the recovery module when it fell into the atmosphere.

Of course, the parachute is also very important during the recovery process of the spacecraft. The parachute has to bear a lot of weight. After all, as objects fall into the atmosphere, they will speed up faster and faster due to the acceleration of gravity.

Under such circumstances, ordinary parachutes cannot bear the weight of the recovery capsule at all. The parachute must be developed with special materials.

As for this technology, Zhao Zhongyao also thought of the bio-steel technology he developed before. He knew that this bio-steel technology can now be applied to the recovery cabin he wants to develop.

Because of this, Zhao Zhongyao quickly designed the shape of the recovery cabin. The entire recovery module is different from the recovery module in the world he lived in. Not a bullet-shaped recovery pod, but a round one.

After Zhao Zhongyao finished the design, he showed it to Cheng Yu and the others.

After Cheng Yu saw the recovery cabin designed by Zhao Zhongyao, he felt a little incredible. I don't know how Zhao Zhongyao designed this recovery cabin to be circular.

"Mr. Zhao, why did you design this recovery cabin as a circle?" Cheng Yu asked Zhao Zhongyao with some puzzlement.

"If it's not designed as a circle, what shape do you think it should be designed?" Zhao Zhongyao asked back.

"Why not design it in the shape of a rocket." The recovery capsule designed by Cheng Yu himself has such a slender shape. Like a rocket.

After hearing what Cheng Yu said, Zhao Zhongyao looked at him and said, "Your design is only suitable for the shape of the rocket. The recovery module fell from a high altitude and did not take off on its own initiative. If it is designed in the shape of a rocket, it will The speed into the atmosphere will not be very fast. The high temperature will not be higher. Also, with your design, the flight path of the recovery capsule is also unstable during the fall. If the recovery capsule rolls in the air, That is very detrimental to the health of the astronauts.

Astronauts in the recovery capsule have very little space and cannot move at all. When the recovery capsule falls into the atmosphere, it has to bear a great weightless image. If the recovery module is not stable at this time, the astronauts will definitely not be able to bear it. If there are some physiological reactions, it will be very detrimental to the health of the astronauts.

Only if the recovery capsule is designed to be circular, so that the recovery capsule will not roll over when returning to the earth, and the astronauts will get a relatively stable flight state in the recovery capsule. "

Zhao Zhongyao's explanation made Cheng Yu suddenly realize, he looked at Zhao Zhongyao nodded and said: "It's still what Mr. Zhao said makes sense, I didn't think so much!"

"Okay, let's develop this recovery module quickly! Only by developing this thing first can we proceed to the next manned spaceflight program." Zhao Zhongyao knows that their current task is to first put this recovery module To develop it, this is the first step of the manned spaceflight program.

After hearing what Zhao Zhongyao said, Cheng Yu immediately agreed. He picked up the drawings on the table, looked at Zhao Zhongyao and said, "Mr. Zhao, don't worry! We will develop this recovery cabin soon."

"Okay, go to work quickly!" Zhao Zhongyao looked at Cheng Yu again and said.

In this way, after more than three months of hard work, Cheng Yu and the others finally developed the recovery capsule. Everything was exactly as Zhao Zhongyao designed.

Zhao Zhongyao was also very happy when he saw the recovery capsule developed by Cheng Yu and the others. After all, everything was as he thought, and this recovery pod was the recovery pod he wanted.

The recovery capsule has been developed, but what about this recovery capsule? This also requires an experiment. If you don't experiment, who knows what kind of problems will arise when you use it.

First of all, an airtight test should be carried out on this recovery cabin. In other words, we need to experiment with this recovery cabin to see how airtight it is. The recovery module is in space and is the place where the astronauts live safely. If there is a problem with the closed system, the safety of the astronauts will be threatened.

Because of this, the closed system of the recovery cabin is very important, and it is also the first system to be tested.

Although this system is very important, it is also very simple to experiment. Just dump the pod into a large pool of water and see if it gets water. If there will be water seepage inside, then of course there is a problem, and it needs to be improved again.

But Zhao Zhongyao is also very confident. He knows that there should be no problems with the recovery cabin he designed. He doesn't have to worry too much about doing this experiment.

In this way, Zhao Zhongyao asked people to pull this recovery cabin from the inside of the experimental workshop to the outside. On an open space, Zhao Zhongyao had people prepare such a large pool long ago.

Because of the manned spaceflight program. These experimental facilities must be prepared in advance. Of course, the large pool used in this experiment should also be prepared in advance.

In fact, not only will the large water pool be used in the recovery module for the experiment, but the astronauts will also wear space suits to carry out the airtightness experiment in the large water pool. The spacesuit, like the recovery module, is to protect the lives of astronauts in space. Therefore, this airtightness experiment is particularly important.

Zhao Zhongyao has now asked people to put the recovery cabin in this large pool and conduct an airtight test. After still entering, Zhao Zhongyao and Cheng Yu stood by the pool, watching the movement in the pool.

Because, if water enters the recovery cabin, there will naturally be bubbles on the surface of the water. If no water entered the recovery chamber, the level would naturally be calm.

Zhao Zhongyao and Cheng Yu can now see that the entire level slowly returned to calm after experiencing some waves caused by the entry of the recovery cabin into the water. No air bubbles came out of the recovery chamber.

"Mr. Zhao, is this recovery capsule qualified? No air bubbles come out of it." Cheng Yu was also very clear about the purpose of this experiment, and he saw that no air bubbles came out of the water. He thought, this recovery cabin must be very airtight.

Zhao Zhongyao listened to Cheng Yu's words, looked at the calm water for a while, and said: "It seems that there is nothing wrong with this recovery cabin, let's fish it up first!"

After Zhao Zhongyao finished speaking, several workers pulled the recovery cabin from the pool to the ground.

After putting it away, Zhao Zhongyao walked to this recovery cabin again. He opened the hatch of the recovery cabin and took a look inside. It was seen that the inside was completely dry, and no water entered the recovery cabin.

At this time, Cheng Yu also came to Zhao Zhongyao's side, and he also saw the situation inside the recovery cabin.

"Mr. Zhao, there is really no problem with the airtightness of this recovery cabin." Cheng Yu was also very happy. After all, this step is regarded as a successful experiment.

"Well! It looks good. However, I don't know what kind of situation people will be inside."

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