A big country of aerospace with black technology

"Report to the command center, I have entered the return capsule!"

Yang Hongwei's resonant voice sounded in the command center.

Accompanied by instructions to return.

The ocean-going survey ship on the Pacific Ocean began to inject the return data of the spacecraft into the control system of the spacecraft.

Radio waves travel from the surface of the ocean to space at the speed of light.

The return capsule, which has been flying with the orbital module for nearly three days in space, started the return procedure.

Start to separate from the orbital module.

As the carrier of many scientific research instruments, the orbital module will continue to fly in space for a month to complete many pre-planned experiments.

After completing all the experimental projects, the manned spacecraft will return to the ground through a soft landing under ground control.

Return to the detached engine above the pod and start firing.

Disconnect the connection between the return module and the orbit module.

Because the process of astronauts returning to the ground is much more dangerous than flying in orbit.

And this time the astronauts returned from space, and the whole process was broadcast live across the country.

Therefore, it is not just the aerospace practitioners involved in returning to the ground who are deeply worried about our astronauts.

Thousands of people standing in front of the TV are also praying in their hearts for the space heroes who are about to return.

Hope he can come back safely.

"I wish him a safe return!"

Zhang Xingyang, who was at the control center of the launch base, thought silently in his heart.

Of course, if you want to say that in this world, the person who worries the most about the safety of an astronaut is naturally his relatives.

As a family member of an aerospace hero, it is naturally a great honor.

But it is also inevitable that I want to worry about my husband, my son, and my father.

In a village by the Bohai Bay, a retired old couple watched their son on the TV.

While being proud of him, he was also extremely worried.

Although the two old men didn't know the specific tasks of their sons, they also knew that they would have to pay a huge price just to go into space and then come back.

In fact, it is true.

As the first Chinese in China to take a manned rocket to space.

There are some minor problems with the rockets and spaceships.

For example, when the rocket is launched and the return capsule returns to the earth, there are strong vibrations and huge pressure.

These adverse environments, although the astronauts were in the process of riding, relied on their spacesuits and good physical fitness to carry them over.

However, it still caused irreversible damage to the astronaut's body.

In later generations, even if domestic aerospace technology has made great strides in development, it can stay in space for a long time.

But as the first astronaut to go into space, he has no choice but to go to the space he loves.

This has also become a great regret in his life.

"The return capsule propulsion starts, and the startup is normal!"

After separating the engines and completing the separation between the reentry module and the orbital module, the propulsion on the reentry module starts.

Start to adjust the angle and orientation of the return capsule, and strive to make the return capsule fall within the predetermined target range.

Similar to the shape of a warhead, the upper part has a slightly pointed ellipse, and the lower part is a flat return capsule, and the tail begins to emit blue-white flames.

The propulsion system of the return capsule adopts the current engine with relatively balanced performance in all aspects.

Therefore, in terms of specific impulse, combustion efficiency, etc., compared with other engines at this time, there is nothing particularly outstanding.

But such an engine has an advantage that others do not have.

That is, it is not as easy to damage as other engines, and in more extreme cases, even if it is only the astronaut himself.

It was also able to barely complete the repair work of the propulsion system of the return capsule.

Although the manned return capsule is similar in appearance to the warheads of intercontinental ballistic missiles loaded with many sub-warheads.

However, in fact, the performance indicators pursued by the two are quite different.

The manned return capsule pursues stability and safety, and the requirement is to be able to guarantee the safety of the astronauts in it during the process of returning to Earth.

During the return process, the astronauts in the cabin will not be seriously injured due to the high temperature generated by the intense friction with the atmosphere.

As for the sub-missile head, in the process of re-entering the atmosphere, what is pursued is the ultimate speed and accuracy, and it must be able to complete high-precision strikes on several targets on the ground.

The return capsule is in space, and has circled the earth for a small half circle, when it is close to the sky above the country.

Attitude control engine, start firing.

For the angle of the return capsule, a series of fine adjustments are made.

To ensure that the return capsule can accurately return to the intended site.

When flying in space with a thin atmosphere, the speed of the return capsule is very fast, like a bullet that is constantly accelerating, shooting towards the earth.

However, the return capsule cannot always maintain such rapidity.

Soon, the reentry capsule entered a denser atmosphere.

The rich atmospheric substances, in the fierce friction with the return capsule, will continuously heat the shell of the return capsule.

So much so that the matter on the surface of the shell has reached the state of plasma.

For manned spaceflight, this stage is also the most thrilling.

Because such high-temperature plasma will have a strong shielding effect on the communication between the return capsule and the ground.

This is also a phenomenon of blackouts that often occurs in the aerospace industry.

On the ground, among the control center and the monitoring station, the connection with the return capsule was lost for a while.

Although everyone knows that this is a normal phenomenon that occurs when the return capsule passes through the black barrier area.

But I still couldn't help it, silently worrying about the astronauts in my heart.

Especially the old couple sitting in front of the TV, almost fainted after hearing that the reentry capsule their son was traveling in had lost contact.

Fortunately, the host later explained that this is a normal scene during the return process of the spacecraft, and the two old people felt a little relieved, but it was only a trace.

The people on the ground are praying for the safety of the astronauts.

Yang Hongwei, who was riding in the reentry capsule, felt extraordinarily uneasy.

Before boarding the reentry capsule, Zhang Xingyang had explained to him in particular.

During the process of re-entering the atmosphere of the reentry capsule, the temperature of the outer shell will rise rapidly due to severe friction, which will create patches of ablation marks on the outer porthole.

Let him not be afraid.

Originally, he didn't care too much, after all, in the past training, they had trained such similar subjects.

But only when he really went through it did he realize how terrifying this process was!

During the return process, you watched the rapid birth of yellow-brown ablation marks on the porthole of the return cabin.

At the same time, it was accompanied by a terrifying low sound.

It was like the echo of a devil, echoing in my ears.

Even though Yang Hongwei repeatedly gave himself psychological hints, telling himself that these were abnormal noises produced during the flight of the return capsule.

But still physically, there is a series of discomfort.

But still physically, there is a series of discomfort.

Fortunately, the time when communication with the ground is not possible is very short.

After a short while, the connection between the return capsule and the ground command center was re-established.

"Yang Hongwei, how do you feel now?"

As soon as contact was restored, the command center inquired about the physical condition of the astronauts.

"The condition is fine."

Yang Hongwei relaxed a little after hearing the voice from the ground.

The abnormal noise that had been lingering in my ears seemed to have disappeared.

After learning about Yang Hongwei's current state through the health monitoring system integrated in his space suit.

Many people in the command center felt relieved.

"Ground search force, have you been sent out?"

Zhao Tianming glanced at the predicted landing time of the return capsule on the big screen, and asked the assistant beside him.

"The helicopter brigade and the ground search convoy have already set off."

The assistant said after inquiring about the current location of the ground search force.

Both the helicopter brigade and the ground fleet are equipped with the latest Beidou positioning system.

It can improve the positioning accuracy to ten meters level.

On the grassland hundreds of kilometers away.

In October, the prairie began to snow heavily, which had a certain impact on the driving of the convoy.

Fortunately, for helicopters flying in the sky, as long as there is no snowfall, it will have no effect.

A helicopter with high-powered searchlights roared past a pitch-black grassland.

"Grandpa, there's a plane!"

After Zhuoya heard the roar, she ran out of the yurt in a hurry, then pointed at the searchlight of the helicopter, and shouted:

"Grandpa, come out and see!"

For children who have lived on the grassland for a long time, it is still very interesting to see the plane.

Habuji hit the dry pipe he carried with him, rolled the pipe, glanced at the helicopter that had been flying farther and farther, and said lightly:

"Zoya, it's already late."

"you should go to bed!"

The old man ignored the increasingly faint roar of the helicopter in the distance, and looked at the energetic little girl in front of him seriously.

After finally coaxing the little girl.

Habuji came to the stable outside the yurt, snuggled up to a tall horse, and watched the convoy passing by less than 100 meters away from his home.

He who just read the news today knew that these people should be the same as before, and they were still looking for the astronauts who were about to land.

It's just that in the past few times, they could only find fake astronaut models, but this time it seems that someone really came back from space.

For the aging Khabji, he didn't know what it was like to be in space.

But he knows that behind this, the country he lives in is getting stronger and stronger.

Those strongmen who once ruled and owned the grasslands failed to achieve any achievements, and now they are happening quietly before their own eyes.

The return capsule drew a fiery red light in the sky.

Those who have not rested, after hearing the news broadcast on the TV, the return capsule is about to land.

Or go out of the house, or go up to the rooftop to see if you can see it with your own eyes.

However, in most areas, this scene is actually invisible.

Because of the problem of the flight trajectory of the return capsule, most of the areas it flew over were uninhabited areas in the northwest.

When the return capsule is still a certain distance from the ground.

The helicopter brigade, as a visual search unit, discovered the target immediately.

"Report to the command center!"

"We have found the return capsule!"

"repeat!"

"We have found the return capsule!"

It is not difficult for everyone in the command center to hear the uncontrollable excitement and excitement from the voices of the reporting personnel.

Of course, it's hard not to get excited when you're actually in that environment.

Glad to be a part of what could be called a historic milestone.

The speed of the return capsule is extremely fast. If it lands at such a speed, not only the return capsule will suffer a great impact.

Moreover, the astronauts among them will also be seriously injured due to the huge impact, and are likely to die.

This has to rely on the deceleration system on the return capsule to decelerate.

When there is still a distance from the ground, the huge drogue parachute on the top of the return cabin will open first.

The parachute as big as a football field opened in an instant, and the return capsule paused for an instant, and the speed was greatly reduced.

Especially Yang Hongwei, who was fixed on the return cabin seat, could feel it.

If it wasn't for the restraint of the seat belt on his body, then he might have flew straight up at that moment.

Fortunately, the seat belt is very strong, which helped Yang Hongwei withstand the inertia of the parachute's sudden deceleration.

Although the parachute can reduce the speed of the return capsule from hundreds of kilometers per second to tens of meters per second.

But even at this speed, a direct landing may still cause greater damage to the astronaut's body.

Therefore, the gamma altimeter on the rocket measures when it is only tens of meters away from the ground.

The signal is transmitted to the thrust reverser engine at the bottom of the return capsule.

The high-efficiency fuel whose performance exceeds TNT in the thrust reverser engine burns instantly and releases high-pressure gas.

However, Yang Hongwei, who was in the return capsule, felt as if a large firecracker had suddenly exploded under his buttocks, and even the return capsule seemed to jump up.

Fortunately, the working performance of the thrust reverser engine is still not to be said, successfully reducing the speed of the return capsule to one-tenth of the original speed.

The return capsule landed smoothly on the Amugulang grassland.

Because of the targeted treatment this time, Yang Hongwei felt a burst of discomfort during the process of returning to the ground.

However, it did not have a relatively large impact on his body, and there was no injury to the corner of his mouth.

The helicopter brigade arrived at the place where the return capsule landed first.

The staff performed their duties, some began to open the return cabin door, and some were covering the gamma altimeter with a lead cover.

Yang Hongwei was in very good condition, and was even able to walk out of the cabin door by himself after the cabin door was opened.

After waving to the crowd around him:

"I'm out of the cabin and in good condition!"

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