There is less than a year left before Shenzhou-3 can truly carry out manned space flight.

The training of astronauts is in full swing.

The training of the first batch of astronauts was very arduous and heavy.

It includes more than 100 subjects in eight categories: physical training, aerospace environment adaptation training, psychological training, basic theory training, aerospace professional and technical training, flight procedures and mission simulation training, survival and life-saving training, and large-scale joint exercises.

Each person has more than 6,000 hours of training.

You must know that the first batch of astronauts was originally selected from among the outstanding pilots of the Air Force.

You can take a look at the selection conditions for the first batch of astronauts:

Have a strong will, dedication and good compatibility, height 160~172 cm, weight 55~70 kg, age 25~35 years old,

Must be a fighter or fighter pilot, with a total of more than 600 hours of flight,

Have a college degree or above, and excellent flight performance, no grade accidents, no tobacco and alcohol addiction, and the physical examination in the last 3 years is "Class A".

In the 90s, such a standard was enough to brush down 99% of the people in the country, but even this can be regarded as a harsh condition.

Still, more than 1,500 people were selected from the Air Force for the second screening.

In ten large sanatoriums, more than 1,000 elite pilots underwent more rigorous physical examinations.

The slightest imperfection on the body will be brushed away.

You even need to check your family medical history, even if you don't have any problems with yourself, but if you have a family history of diseases that are not conducive to aerospace work, it will still be brushed off.

At this level, half of the candidates were brushed down, and there were still 800 people left.

These people are excellent in all aspects, but they still need to be selected for the third round!

This round is to compete whose body is more able to adapt to the work of astronauts.

At this level, 60 of the 800 people will be selected to be truly suitable for aerospace work.

Eventually, these people undergo special physiological function examinations in the Institute of Aerospace Medical Engineering.

Find out if they have stronger aerospace physiological functions than ordinary people.

For example, the overweight test on a centrifuge is carried out to see if the body can withstand extremely strong overloads.

Hypoxic endurance tests are carried out in the pressure chamber, where oxygen is removed after the tester enters the chamber.

As the air pressure drops to an altitude of 5,000 meters, if someone can't adapt, they will be eliminated.

If you reach an altitude of 10,000 meters and your skin feels an itchy sensation like ants crawling, it means that you have decompression sickness and will be eliminated.

Swing at high speed for 15 minutes on a six-metre swing to detect vertigo.

In a room full of noise and vibration, endure constant external disturbances and observe for restlessness.

Stand up and lie down on a tilting bed with your head down and feet high, measure carotid artery blood flow and cardiac attachment ability, and lower body negative pressure.

After these brutal and lengthy selection tests, twelve personnel were finally selected to enter the astronaut corps.

By now, these people have been training for almost three years.

Because our first astronauts are basically trained pilots, they not only have to operate the spacecraft, but also take into account the identity of the ship's engineers and payload specialists.

Therefore, many of their training subjects are very heavy, such as these astronauts in front of Zhang Xingyang now.

"After the propulsion system of the Hongyan rocket fails, what should we do in the first place?"

Zhang Xingyang, as the chief designer of the Hongyan rocket, is assessing the astronauts in front of him.

As pilots, they also need to learn a lot of theoretical knowledge, including rocket and spacecraft design principles, flight dynamics, meteorology, astronomy, communications, equipment testing, aerospace medicine knowledge, and so on.

Of course, those are only theoretical knowledge, and Zhang Xingyang is now learning and assessing flight procedures and mission scenarios.

They must learn to detect and troubleshoot emergency problems.

This is not only for the success of manned space missions, but also for the safety of their own lives.

"This issue should be considered in different time nodes."

Sitting on the other side of Zhang Xingyang, Yang Hongwei, who was serious, replied according to the theoretical knowledge he had learned before.

"If it was before the rocket was ignited, it was found that there was a problem with the propulsion system."

"Then it is necessary to contact the control center as soon as possible and suspend the launch of the rocket."

"Then the launch site engineer is notified to inspect the propulsion system of the rocket."

In this case, in fact, it is the simplest one, after all, the engine has not yet started working, and the danger is not very great.

"If it is found that the propulsion system is faulty after the first stage rocket has been ignited."

"First get into the escape tower, then it's up to you."

If there is a problem after ignition, it is difficult to solve the problem of the rocket propulsion system by relying on the astronauts themselves.

And for the personal safety of astronauts, they must enter the escape tower as soon as possible to escape.

Otherwise, there is a high probability that there will be a major accident when there is a problem with the rocket.

The escape tower will maintain a safe enough distance from the rocket under the action of the separation engine to protect the lives of astronauts.

After all, the life of an astronaut is more precious than the same weight of gold.

In order to train qualified astronauts, the state has invested hundreds of millions of dollars in various trainings for them.

Not to mention anything else, just the special supporting training equipment, the construction cost is as high as tens of millions, and this is only the cost of materials.

The daily training plan and nutrition planning are carried out by a special person.

It can be said that every gram of meat on their bodies is counted.

The weight will not deviate greatly, but will remain at a relatively stable value all year round.

Next, Zhang Xingyang asked a few more questions about the emergency treatment of the rocket, and the other party's answers were all correct.

On the evaluation in his hand, he wrote one by one excellent, Zhang Xingyang smiled and said:

"This time you passed the assessment, congratulations."

Yang Hongwei, who was sitting opposite, although his body posture had not changed, his body was obviously not as tight as before, and the whole person relaxed.

This assessment is directly related to whether he can be selected to carry out the first manned space mission in the future.

Everyone in the astronaut corps is now staring at this only position, and they all want to be the first to go to the sky.

Twelve people, almost all of them are desperate, learning all kinds of aerospace knowledge.

Because as long as there is a little bit of learning that is not in place, it may be eliminated in the subsequent selection process!

"Thank you, Dean Zhang."

Yang Hongwei sincerely thanked Zhang Xingyang.

However, Zhang Xingyang does not have any special ideas:

"Thank me for what."

"You should thank yourself."

"After all, the only person you can rely on after going to heaven is yourself."

The first manned space program had only one space for astronauts, so whatever happened.

The astronauts can only find a way to solve it by themselves at the first time.

After saying goodbye to the astronauts, Zhang Xingyang came to a large laboratory.

This time, it is only incidental to assess astronauts as rocket experts.

The real purpose is something else.

"Yo, Dean Zhang is here."

As soon as he entered the laboratory, a middle-aged man with a fair face greeted him.

Yang Bing is responsible for the development of spacesuits in manned spaceflight systems.

"Lao Yang, you are in such a hurry to call me over, is there anything to improve in the spacesuit?"

Before Zhang Xingyang came, he only knew that the other party was going to discuss the problem of spacesuit with him, but it was not clear what the specific problem was.

"There are certain problems with the anti-overload design of the spacesuit."

Yang Bing didn't be too polite, everyone's time is precious, and it is a waste of time to talk a little more nonsense.

"We used to inflate to resist overload."

"But now it has been found that during the re-entry process, the overload is very high, and the original design does not achieve the desired effect."

This time, during the re-entry of Shenzhou 2, they detected a maximum overload of 9 G!

Such an overload, and it occurs in a very short period of time, will directly cause astronauts to have various adverse reactions in an instant.

Although there is no immediate danger to their lives, it will have a great impact on their professional lifespan.

Domestic astronauts are not disposable products, and many of them need to go to space many times in the follow-up planning.

Therefore, this problem must be solved, otherwise it will have a great impact on the subsequent manned space program.

"Why don't you use a liquid-filled type to resist overload?"

Zhang Xingyang looked at the spacesuit, which was a little taller than himself, and asked with some incomprehension.

It should be common knowledge for them that liquid-filled methods can react faster and complete the process of resisting overload.

Moreover, because the liquid-filled type is a purely physical process and does not involve chemical reactions, the effect is also very good.

This is also the reason why Zhang Xingyang was so confused after reading the spacesuit.

Yang Bing naturally knows the benefits of using a liquid-filled load-resistant system, but they also have their own considerations.

"We also thought about using the liquid-filled type, but there was a problem with the liquid-filled type."

"It's just too heavy!"

At this time, Yang Bing led Zhang Xingyang to another small room in the laboratory.

There's another spacesuit that doesn't look the same.

"This is the spacesuit we tried to make earlier with a liquid-filled load-resistant system."

"How much does this set weigh?"

Zhang Xingyang also asked with some curiosity, after all, if the weight difference was not very large, they should not give up such a plan.

"The liquid-filled load-resistant system alone weighs 30 kilograms."

"If you count the total weight of the spacesuit, it reaches one hundred and forty kilograms!"

"In the case of losing the power source, the astronaut will not be able to walk a hundred meters on it."

Yang Bing said with emotion, touching the cold surface coating of the spacesuit.

"The probability that the power won't start is very low, and to be honest, you're a bit choking."

Although he knew that his words might be a little unpleasant, Zhang Xingyang still pointed out that their idea was not very valid.

"Moreover, even if the liquid-filled anti-load system is not used, the weight of the inflatable design will reach about 120 kilograms."

"It's still very difficult for astronauts to move without a power source."

There is nothing wrong with what Zhang Xingyang said, but they themselves thought too extremely.

It is not realistic for them to want astronauts to be able to work without a power source.

"Maybe we're wrong."

After being silent for a while, Yang Bing said with a wry smile.

"We also want astronauts to survive in extreme situations."

"But as things stand, that's not realistic."

Zhang Xingyang patted Yang Bing's shoulder and said:

"Lao Yang, believe us, the probability of problems in our power system is lower than the probability of you becoming a woman."

Zhang Xingyang's ridiculous words made Yang Bing's mood slightly better.

The power system of the spacesuit uses two high-energy-density batteries, and the value of these two batteries alone reaches seven figures.

This is also the reason why the cost of the spacesuit has reached tens of millions, and every part on it is not cheap!

"Xingyang, you haven't seen astronaut training yet, have you?"

"Would you like to see it?"

At this time, Yang Bing also changed his mentality.

In fact, in the future, Zhang Xingyang will not say that he will watch other people's training, he himself has experienced a lot of astronaut training.

But at that time, the content of his training should be very different from now.

It's not just a matter of the progress of the times, it's a difference in status, and of course he trained as a technician.

For some physical training content, there is no such perverted as those drivers who require extreme physical strength and endurance.

"Are there any training sessions going on right now?"

"What are you training in?"

Zhang Xingyang asked with some curiosity.

"At this time, they should be doing overload training."

The two walked out of the spacesuit lab and came to another large laboratory in the base.

In the middle of the large room, a huge swing arm is spinning at high speed.

This is a large centrifuge that is rotated to simulate overload.

In the rotating cabin, under the strong force, the astronaut's facial muscles began to deform and sag, and even if he tried his best to control himself, tears still flowed involuntarily.

"The next item is overweight training in the head-pelvis direction."

Yang Bing, who was outside, introduced Zhang Xingyang to the follow-up training subjects of astronauts.

The direction of the head and pelvis is the direction of the line from the top of the head to the pelvis.

During this training, the astronauts in the rotating chamber felt as if the blood was about to be thrown up their spines.

And there is no interval between the items, the last second is the training in the direction of the head and pelvis, and the next second it is in the direction of the chest and back.

Without giving the astronauts any time to breathe, it was as if a boulder weighing hundreds of pounds was pressed on his chest, making people's hearts beat faster, breathing difficult, and the internal organs as if they were about to be crushed.

Zhang Xingyang looked at the arm length and rotation speed in the field, and had his own guess about the strength of the load, but in order to verify his idea.

Or the exit asked:

"How much overload do they have to carry at most?"

Yang Bing turned his head at this time:

"An overload of up to 12 G."

Even Zhang Xingyang, who has always been well-informed, was a little surprised.

In general, good pilots experience a wide variety of adverse reactions when subjected to an overload of 9 Gs.

For example, subcutaneous bleeding, black vision, red vision and so on.

However, astronauts need to withstand high overloads for much less time than pilots.

This is one of the reasons why they are able to withstand high overloads.

But even if it's short, it's still the most painful and dangerous part of the training.

During training, everyone will have one hand holding the alarm, and as long as you feel that you can't support it, you can press the button on the alarm at any time.

The centrifuge will complete the deceleration in the shortest possible time.

However, in the course of several years of training, no one has ever stopped this training for subjective reasons, and they have all relied on their own strong willpower to complete this training.

Forty seconds of training time is a long time for an astronaut in a centrifuge.

For those who observe from the outside, it passes quickly.

As soon as the centrifuge stopped, the medical staff in the laboratory rushed up as fast as they could.

Every time you go through such extreme training, it will cause great damage to the astronaut's body.

Therefore, medical personnel must carefully examine the astronaut's body at the first time.

This time it was Jing Haipeng who was training, and when he was rotating the cabin, he was basically unable to stand on his own.

The medical staff were only able to support him and transfer him to a stretcher.

Zhang Xingyang could see that there were many fine bleeding spots on his body.

These are caused by excessive loads and rupture of subcutaneous capillaries.

"If they had liquid-filled spacesuits, would this still happen?"

Zhang Xingyang pointed to the astronauts who were still carrying out various first aid measures on the side and asked.

"No, the overload that the spacesuit can resist is very large, even if it is twelve times the gravity, after wearing the spacesuit, it is at most about four times the gravity on a normal day."

Quadruple gravity, for ordinary people, may feel particularly uncomfortable, but for astronauts, it can only be regarded as sprinkling water.

"Quadruple gravity, it's really acceptable."

At this time, Zhang Xingyang explained the power system of the spacesuit again, wanting to dispel the other party's prejudice:

"As for the power source, if you are really not at ease, we can arrange another backup energy system."

"But then, the backup energy system can't be installed on the spacesuit."

"It can only be connected to the manned spacecraft, and in extreme cases, it can be connected and used."

Yang Bing also knew that their previous thoughts were indeed extreme.

But considering the extreme situation, it is understandable, after all, any situation may lead to the death of astronauts.

And this kind of situation is something that no one wants to see.

"It would be nice to be able to avoid extreme situations where you don't have motivation."

Both of them tacitly did not mention the issue that might add a lot of load.

Fortunately, the Hongyan rocket has a large carrying capacity, and even if a backup energy system is added, it can still be launched.

There's another chapter tonight.,By the way, ask for a monthly ticket.,If you have a monthly ticket, vote.。

(End of chapter)