Rebirth 2008: I Can Make Money Reading Chapter 506

The latest website: the next morning,

Mu Yang got up later than usual, feeling a little tired, and his waist was a little sore. It seemed that he had tossed around for too long last night.

Eat sui and know the taste, forget the time.

Sitting up from the bed, he found that his wife was no longer on the bed, turned over and got out of bed, reached for the phone from the bedside table, and saw that it was already eight o'clock in the morning.

"Hey, it's so late, more than an hour later than usual, it seems that we need to control the time from now on."

Maybe it was because I got too many achievement points last night, and I was a little too excited. The master fought, turned YUN over YU, and got QIANG in the move. The duel was muddy.

At the beginning, I was in love with four SHEs, but now I look back and feel exhausted, and I feel a little bit depressed.

He got out of bed slowly and picked up his clothes. His wife Song Xuelu just came up from downstairs and entered the room. After seeing it, she helped him tidy up his collar carefully.

"Husband, why don't you go to the company today and take a day off, today is Saturday." Mu Yang simply let go of his hands, stood stupidly, and asked his wife to help tidy up his clothes.

The air outside the window blows in, and the nose sniffs unconsciously. The fragrance is overflowing, including the fragrance of flowers outside the window, and the fragrance of the wife's hair in front of me.

He lowered his head to appreciate her fair little hands, and her face was still tender, but it had faded away, and the corners of her mouth were full of smiles, adding a touch of charm.

She was wearing a pure cotton home dress today, her front was undulating, and she couldn't see her feet when she looked down.

Mu Yang embraced her slender waist and hugged her. Feeling two soft elastics, he held her chin with one hand and clicked it.

"Really, when the child comes over in a while, it's not good to see."

Even though Song Xuelu was married, she was thin-skinned, so she blushed slightly and pushed him away gently. Mu Yang blinked, teased his wife, and then unscrewed the rest of the buttons by himself.

Song Xuelu turned around and helped tidy the quilt on the bed. Just after the quilt was folded, she saw a crumpled piece of paper at the corner of the bed, frowned, and blamed the husband for being so real, throwing it around, making it embarrassing for the family to see, While whispering and nagging, she still picked it up and threw it into the bathroom toilet to flush it away.

"Husband, it's a bit cold outside, why don't you wear two thin clothes when you go out." Song Xuelu looked at the clothes her husband was wearing and reminded her.

The constant temperature at home is about 20 degrees Celsius, so you can't feel the cold outside temperature. "How long will it be?"

"It's six or seven degrees. It's drizzling in the morning, and the north wind is blowing over. It's chilly."

"Winter is coming so fast today." Mu Yang left the bedroom, went to the closet next door, added a woolen underwear, put a thicker shirt in the middle, tied a tie, and wore a suit.

I'm still young now, but it's not like when I was in middle school. At that time, the temperature was several degrees Celsius, and I still took cold water.

It doesn't mean that there is no hot water for washing. The main reason is that there is no hot water in the bedroom, so you have to walk to the public bathroom to take a bath, and sometimes you have to queue up.

But after I went to college and fell in love with taking hot or cold showers, I never dared to take cold showers again. Once people get used to something, it is very difficult to change back to the original.

Thinking of this, he felt that time passed so fast. October 8, 2008, October 18, 2015. Seven years have passed since I was reborn in this life.

If you add one lifetime, more than twenty years have actually passed since middle school. Mu Yang had breakfast at home and spent the morning with the child.

In the afternoon, even if it is a weekend, I still go to the company as usual. The lab is resting today, and he plans to sort out the work at hand. half an hour later,

The scientific research work at hand is only the rocket project, and the smart city does not need him to stare at it, and the engine is used for the time being.

The main body of the rocket has a lot of work to do, such as the seemingly simple structure of the fairing (located on the top of the launch vehicle), which is also a very critical component.

If the fairing cannot be opened normally after the rocket reaches orbit, then the satellite cannot be launched normally. If it is a manned satellite, the astronauts must be finished.

Aerospace companies that produce fairings have conducted countless tests in order to ensure normal separation.

The quality of the fairing depends on the rocket and

In terms of load, the fairings of small rockets are as light as one or two hundred kilograms, and the fairings of medium and large rockets are more than two tons and less than five tons.

Structural materials Combination of graphite fiber composite materials, glass fiber reinforced plastics, aluminum alloys, aluminum crest sandwich materials, etc. Commonly used materials are aluminum alloys and carbon fibers, etc. Since electromagnetic waves cannot penetrate these two main materials, it needs to be localized according to different payloads. Replace the area with wave-transparent material, otherwise the radio signal cannot be connected.

The fairing is more than 100 kilometers away from the earth. At this altitude, because the air is very thin and factors such as aerodynamic heating are not enough to affect the satellite, the fairing completes its mission and will be separated into two half-covers and thrown away.

At the current level of technology, satellite rockets launched around the world throw away their fairings.

Since part of the fairing is made of carbon fiber, its material cost is very high. For example, the cost of launching a single Falcon 9 is 60 to 70 million US dollars, but its fairing costs 5 to 6 million US dollars.

After the fairing is separated, it is attracted by the gravity of the earth and falls into the atmosphere. When it rubs against the atmosphere, it heats up and burns down. However, like a large fairing, most of them cannot be burned.

I remember that in 2011, after the successful launch of Shenzhou VIII, the fairing separated and fell, and 100,000 people evacuated without fire or electricity.

This well is no joke!

Because there are gas stations, power plants, coal mines, substations, oil depots, chemical plants and many other flammable and explosive places and enterprises in the fall area of ​​the fairing weighing more than 2 tons, as well as natural gas pipelines for the West-East Gas Transmission, the threatened The length of the pipeline is hundreds of kilometers. If it is hit, the consequences will be disastrous.

Each half of the fairing weighs more than a ton, falling from the ground at a speed of hundreds of meters per second, and the impact force can be imagined.

Judging from the technical situation at the time, it was impossible to control the fall area of ​​the fairing. The range was too large, so that the search range was also very large, and a lot of material resources and manpower were spent.

Therefore, Mu Yang wanted to change the recycling method of fairings. That is, do not separate and throw away!

Then how to launch the satellite in the fairing?

In fact, the structure that Mu Yang needs to do is to open it, then slide it to the outside of the main body of the rocket, wait for the satellite and other loads to be released, and then reassemble the fairing to return to the state before launch.

Since the front end of the fairing is tapered, if the opening is not large enough, the release of satellites will still be affected.

Therefore, the opening space for the fairing to open is required to be large enough, and the fairing will not affect the launch of the satellite after it slides toward the main body of the rocket.

In fact, it is not that his plan has not been thought of by experts.

First, the structure is a bit more complicated, and the weight of the fairing is increased, which may require several hundred kilograms more.

Originally, the payload launched into geosynchronous orbit was only a few tons, and the cost per kilogram was US$10,000.

If the load is a few hundred kilograms less, that is a few million dollars.

Not worth it!

Second, if the structure is complicated, it will be more difficult to successfully divest, and this is where the biggest risk lies.

Third, the rockets they designed were not intended to be recycled. Except for the satellites that were launched, other rocket components must be thrown into space. There is no need for such a complicated structure. It must be under the condition of ensuring the strength and safety of the satellites. The lighter the better.

Fourth, if you really want to recover the fairing, there are other options.

For example, Shenzhou 15 uses control + parachute, but it is still burned during the landing process, and the landing speed is not low.

However, Xinghai Group's rockets are different.

Due to the high thrust of Xinghuo-1, Xingkong-1 can carry more material into geosynchronous orbit.

That is not ten or twenty tons, but,

90 tons!

That's right, the load can reach an exaggerated 90 tons.

If it is in low earth orbit, it can reach 200 tons.

It is really very difficult to get together 90 tons of satellites to launch together. How many medium and large satellites are needed?

Therefore, under normal circumstances, most of the load is wasted. Just like dozens of tons of trucks pulling hundreds of kilograms of materials. When Mu Yang thought of this, he was also very helpless.

Where is his Xing Kong No. 1 carrying satellites? It was moved to space, and it was specially used to build a space station.

So, as long as the power is strong enough, many worries can be ignored.

The fairing is made into a sliding rail type, and it is not thrown into space. After the satellite and other loads are put in, it will merge back to its original state, and then return to the earth with the main body of the rocket.

Mu Yang's plan was beyond the imagination of other experts.

No way, who told him that the thrust of the Xinghuo-1 rocket engine is so abnormal. Liquid hydrogen + liquid oxygen is not new!

But with full-flow graded combustion, only a pervert would dare to think so.

The pressure in the combustion chamber is very high and the temperature is extremely high. It might be a missile. Therefore, it was no wonder that Ye Fan, the project manager, was uneasy.

This is for him to rub the atomic bomb with his hands!

With such a large thrust, it can be said that Muyang can consider not using aluminum alloy + carbon fiber.

He can use titanium alloy + nickel-gold composite material to make the fairing, which is more resistant to high temperature. However, the overall weight is doubled.

Moreover, the center of gravity of the rocket will also be affected somewhat

Mu Yang has already handed over the drawings to the manufacturing center. The company currently does not have the ability to produce carbon fiber, so it still has to purchase it from outside.

Carbon fiber is also a very important material, and Mu Yang has included it in the development plan. The rocket structure consists of 4 main sections.

1. The payload compartment is loaded with things to be carried such as satellites, spacecraft, and nuclear warheads, and the outside is equipped with a fairing.

2. Control the instrument section, including guidance, attitude control, power supply, power distribution and other systems.

3. Propellant tank section.

4. Engine compartment section.

For the Xinghai Group, the first part of the fairing needs multiple tests, and the satellite has not yet been developed;

In the second part, many parts and components cannot be purchased, and independent research and development is required, which delays time. The third part is not a big problem, and the fourth part of the rocket engine Xinghuo-1 is almost completed. If the main body of the rocket is ready, of course the satellite is the worst.

Therefore, the core of Mu Yang's next work is the development of satellites.

The Xinghai Group will also launch its own satellites to occupy space resources in advance.

According to the principles established by the international community, whoever occupies it first will own it, and at the same time cannot interfere with other satellites.

Affected by the Xinghai Group, Musk's money-making speed is much slower, and the development of his space exploration company has been seriously affected. The Starlink plan has not yet been announced, and it is estimated to be announced in 2016.

There are three main reasons why Mu Yang didn't plan to announce it first.

First, the announcement of the Starlink project will definitely be protested by the scientific community and opposed by various countries. This is the principle of shooting the bird that stands out.

They announced in advance that it is impossible to transport a large number of satellites into space in a short period of time. Second, Xinghai Group has not yet developed rockets and satellites.

The rocket sample will be reported by the end of the year at the earliest, and the satellite is estimated to be early next year at the earliest.

The best time is to let Musk bear the wrath of the scientific community after Musk announces it. Third, the Xinghai Group's first announcement will definitely be boycotted by Western countries.

In this case, it is better to let the other party announce first.

Since Musk's space company can do it, our Xinghai Group can do it too, so don't have any disputes.

Xinghai Group takes advantage of the powerful carrying capacity of Xingkong-1. The height of the Starlink satellites is in low orbit, and the payload of Xingkong-1 reaches 200 tons. As long as the production capacity of the satellite can keep up, all resources can be occupied within a year, or even not used.

At that time, Musk and Ugly Country will definitely be stunned.

Even if you launch a bad satellite, you have to take up resources and replace it with a better one.

As long as he occupies it first, Musk will not be able to engage in any more Starlink projects. When Mu Yang thought of this, he laughed a little.

Of course, there is a reason for him to engage in the Starlink project, and it is not just to occupy resources.

Satellites are not cheap. Even if the Muyang Starlink plans to launch small satellites, a few million yuan, tens of thousands of satellites will cost hundreds of billions of yuan

Of course, the cost will be many times higher than the laying of optical cables across the country for 5G in the future.

This is also the way to enter 5G ahead of time, overtaking on curves.

As for how to charge the communication fee, that is a matter for the future.

Anyway, let's talk about it first.

In fact, even if Xinghai Group does not engage in the Starlink project, it still needs communication satellites, not simply communication services.

The Xinghai Group did not intend to compete with the country for any communication business, but only used it for itself to further improve confidentiality, anti-interference and flexibility. In addition, it was also for the future layout.

In the future layout, he needs communication satellites with stronger anti-interference. Therefore, independent research and development of communication satellites is imperative.

Before that, Mu Yang also figured out the cost of operating communication satellites. After roughly calculating, it was really expensive.

The first is the cost of communication system products, including the cost of structure, thermal control, power supply, attitude control, reaction control, radio measurement and control, data management, cable network and communication.

The second is the cost of satellite products (overall design, manufacturing, assembly, inspection, testing, and management costs). Generally speaking, the heavier the quality, the greater the communication capacity, and the lower the cost per channel. Its cost is mainly related to quality and power.

The third is launch costs.

Communication satellites are geosynchronous satellites, which are stationary relative to the earth and lie about 3.6 degrees above the earth's equator.

Three stationary communication satellites evenly arranged in a space of 10,000 kilometers can form a communication network. Then, except for the polar regions, almost global continuous communication can be achieved.

If only three satellites are launched, the launch cost will be expensive.

Generally speaking, the cost of a rocket launch is fixed. For example, 50 satellites are launched at a time, and then the launch cost is apportioned according to the quality.

In general, if a communication satellite has a mass of 1,000 kilograms, the communication system product cost is about 30 million yuan, and the satellite product cost is about 67 million yuan. The launch cost fluctuates greatly.

A few years later, taking speX's Falcon 9 rocket as an example, the launch fee of the rocket was about 62 million US dollars. The maximum mass launched into geosynchronous orbit is 8300kg, and an average of one kilogram costs 8,000 US dollars.

For a communication satellite of 1,000 kilograms, it costs almost 10 million U.S. dollars.

Of course, its launch cost is extremely low, perhaps only a few million dollars.

In general, operating three communication satellites for ten years (based on a ten-year lifespan), each with a mass of about 1,000 kilograms, will cost seven to eight times the total cost of space activities (including communication system product costs, satellite product costs, and launch costs). billion.

But after calculating the cost of infrastructure and other miscellaneous things, it will be at least one billion yuan. So, without one billion yuan, I can't afford the business of communication satellites.

If the mass of the satellites is larger, each weighing 2 tons, about 2 billion yuan will have to be prepared in ten years. Small satellites like Musk's are mass-produced, and the average one costs hundreds of thousands of dollars.

And some countries' special satellites, such as spy satellites, even cost billions of dollars.

The calculation of all satellite fees fluctuates greatly, and the data is roughly the same. It is normal for individual differences to be large. Let alone Chinese cabbage, the prices of different regions and different time periods vary greatly.

Mu Yang wants Xinghai Group to assemble its own communication satellite system. This amount of money will cost more than one billion or two billion yuan or even more in ten years, but it will not be exaggerated to tens of billions.

Of course, I have mastered the rocket recovery technology, and the launch cost is greatly reduced. In addition, foreign communication satellites are all independently developed and manufactured, and the cost will be much less.

He roughly calculated that one billion yuan was enough for him to play communication satellites, and it was still ten years.

Moreover, his communication satellite is different from Starlink's satellites. One is for personal use, while Starlink's is for public use. Of course, self-use communication satellites can also use Starlink's resources.

When Mu Yang was sorting out his research and development work, eight of his students were gathering at a hot pot restaurant outside Jiangsu and Zhejiang University.

As a senior sister, Leng Han was the first to speak:

"now

Tianlai convened everyone to build a team together, one is to connect with each other, and the other is to congratulate our teacher for winning the Nobel Prize and the honorary title of academician of the Chinese Academy of Sciences and the Chinese Academy of Sciences.

Maybe these honors are not very important to teachers, but for us, it adds a lot of pressure.

The teacher's students are too bad, right.

The outside world has been denying that teachers recruit students, thinking that teachers can't cultivate any talents, but in fact they are denying us.

The teacher also said, let us not care about the public opinion of the outside world, do scientific research in a down-to-earth manner, live for ourselves, and rarely put pressure on us.

Having said that, I still feel that I am not up to the mark. As a senior sister, I have been under the teacher for nearly two years, and I have not made any achievements. I apologize to everyone for not being a good example.

When Jin Wei saw Leng Han say this, he also felt a little guilty: "Well, I also have a share, and it's true that I haven't made any achievements."

"Senior Sister Leng, Senior Brother Jin, it's not your fault, it's only been two years, you can still lay the foundation, accumulate strength and accumulate strength to move forward, if the results are achieved so easily, those experts will be ashamed.

In a few more years, it will be much easier to come up with achievements. "Chu Yun, a student of the third class, said.

Hearing this, Leng Han smiled relaxedly: "Okay, the comforting words of Junior Sister Chu Yun made me feel very comfortable. I really have to follow what the teacher said, the foundation must be solid, just like the Xinghai Group, step by step , it will be much easier to develop cutting-edge technology in the end.”

"The teacher is too powerful. As a student, the pressure is too great~www.mtlnovel.com~ Judging from the current situation, I feel that it will be difficult to share the teacher's worries in the next one or two years."

"Everyone does well the learning tasks assigned by the teacher, which is to share the teacher's worries. Don't expect to make any big achievements." Leng Han encouraged, "It's rare to have a party, and the weather is starting to get cold. Let's have hot pot at noon today. , continue to work in the afternoon.

We undertook the UAV project and just set up a team. We can't rely too much on the engineers of the project team, we still have to rely on ourselves.

Of course, we are a team with engineers, and we should not treat them differently, but learn from them with their strengths and experience.

I hope that everyone will work together to successfully develop it as soon as possible, so that the teacher can be satisfied. "

The teacher gave them one billion project funds and asked him and Jin Wei to build a drone project team. After the calculation, they felt that they couldn't afford the company's experts, and it was not easy to recruit people, so they had to invite some senior engineers and mid-level engineers. Engineers, and some novices, take them, a team of 40 people.

"Okay! Let's work together!" Everyone raised their fighting spirit.

Chapter end