January 22nd.

Rocket assembly company in Tsu City.

This is the general assembly workshop responsible for the Chang-5 launch vehicle.

Chen Yao, the chief engineer of Changwu, Li Guoqing, the chief designer and others were busy, and suddenly the general manager Dong Xiande walked over to the two with a happy face.

"Mr. Dong, is there any joy today, my son is married to a daughter-in-law or a wife's second child," Li Guoqing joked.

For the unserious Li Guoqing, Dong Xiande laughed: "Haha, it's a great happy event, but it's not me, it's everyone's happy event." ”

Li Guoqing coaxed: "Could it be that the organization is ready to give our company's single dog daughter-in-law?"

"Haha......" In the assembly workshop with a dull atmosphere, there was a burst of laughter.

Dong Xiande shook his head with a smile, and scolded with a smile: "I want to marry a daughter-in-law and go on a blind date by myself." ”

After the joke, Li Guoqing put away his hippie smile: "What a good thing to say"

"The one plans to place 24 medium-sized satellites in low earth orbit this year, each of which is about 7.5 tons." Dong Xiande replied in a low voice.

Li Guoqing couldn't react for a while, and asked uncertainly again: "24"

"Yes."

"I'm obedient, will it be too urgent to arrange 24 pills a year?"

Dong Xiande added in a low voice: "I heard that next year's task will be heavier, so we are required to send these 24 satellites this year." ”

"So urgent," Li Guoqing frowned.

Dong Xiande felt excited at the same time, but also felt a great responsibility: "Yes! However, the support has also increased a lot, and I heard that I plan to invest the funds that previously supported the semiconductor industry in the aerospace field. "あ七^八Chinese ヤ~(8)~1~ωωω.7\8z*òм

Of course, Li Guoqing of semiconductors knows how much money China has invested in semiconductors over the years, and with the rebuilding of Huaguo Semiconductor by Shenguang Instrument, domestic semiconductor companies have been able to achieve self-sufficiency, and there is even capital overflow.

Therefore, this year, we plan to invest up to 500 billion yuan in the aerospace field.

The reason for such quick success is that the sense of crisis in the Netherworld is increasing day by day, and the second is that cell chips will replace a large part of semiconductor chips.

Now it is also investing a lot of money in semiconductor chips, which is just a waste of money.

Considering the arrangement of the three major satellite systems and the consideration of entering the interstellar era in the future, it is imperative to concentrate funds on the aerospace field.

Although an investment of this magnitude may seem like a desperate gamble to outsiders, the Netherworld is now growing more and more confident.

Once the biological computer enters the large-scale application, the society as a whole will enter a new stage, and engineers and scientific researchers can be customized in batches.

Imagine that there are more than 280 million engineers and scientists among the 1.4 billion new humans, even if only 20% of them are suitable for engineers and scientists.

Moreover, these engineers and scientists can be at the level of one hundred, and mankind will usher in leapfrog development.

Now that the G organization has become a roadblock, if the other party is not eliminated, Huang Mingzhe and the Netherworld will have trouble sleeping.

The purpose of the Listening Satellite System is to search the "Paradise" of the headquarters of Organization G hidden on the blue star; The silent satellite system is designed to suppress the outbreak of nuclear war; The Phoenix satellite system is designed to clear the G organization and complete the strategic deterrence.

These satellite systems need to develop the space field, and without the development of launch vehicles, large satellites or space stations cannot be deployed in outer space.

……

"Talking about a big event" Chief Engineer Chen Yao walked over from the workshop.

"That's ......," Li Guoqing explained what Dong Xiande said just now.

After listening to Li Guoqing's explanation, Chen Yao touched his forehead, which was as smooth as a mirror, and the receding hairline, and secretly sighed that the only remaining black hair may be gone forever.

However, after glancing at Li Guoqing, who was already in the Mediterranean, Chen Yao felt a little better.

Dong Xiande hurriedly asked: "Lao Chen, how is the progress of our long-five-D research and development work?"

Chen Yao, who was worried about his hairline, glanced at his watch and replied: "The progress is already very fast, and in about 5 days, you can conduct the first interview car." ”

The Chang 5-D type is a new version improved on the basis of the Chang 5-B and Chang 5-C.

Although the payload has not been improved much, the maximum payload in low-earth orbit is about 37.2 tons, and the geostationary orbit is about 21.8 tons.

But the Chang-5-D has added a very important system, that is, the recyclable launch vehicle that SpaceX has been working on in recent years.

Last year, SpaceX went to experiment with the first recyclable launch vehicle.

However, the recovery system of Chang 5-D is more thorough, and according to the original scheme design, it can not only realize the first-level recovery of the core, but also the second-level recovery of the core.

And in terms of recycling, it is also different from SpaceX's Falcon rocket.

The core stage of Chang 5-D is separated near an altitude of 100 kilometers above sea level on the Kármán line, and then the descent posture is adjusted, and the auxiliary engine is gradually decelerated during the descent.

Until it descends to an altitude of about 30 kilometers, it deploys its auxiliary flight wings, enters the large drone mode, and flies directly back to the launch site or recovery site or sea recovery platform ship.

Similarly, the core second stage is also a similar recovery method, but the core second stage has two more stages: low earth orbit orbit orbit flight and atmospheric entry.

If the core level 1 and core stage 2 of Chang 5-D are successfully recovered, then the launch cost can be reduced by about 90%.

After all, the fuel for the launch vehicle is very cheap, relatively speaking, and the domestic electricity price is lowered every year, and the fuel cost for the launch of the Chang 5 is about 1.2 million.

The real cost is actually the core level 1 and core 2, which contain engines, electronic control systems, maintenance equipment, fuel storage tanks, etc., all of which are more expensive than gold.

At present, the launch cost of Chang-5-C is 580 million Chinese yuan per time, and the launch cost of Chang-5-D, which is preparing for testing, is about 60 million.

If it can be reused 10 times, the cost can be reduced to about 50 million; It can be reused 20 times, and the cost is reduced to about 35 million; More than thirty times, the cost will be as low as about 20 million.

However, the recoverable rocket is not without shortcomings, originally according to the design of the Chang-5-D attempt, as a disposable launch vehicle, it can increase the payload in near-earth orbit to about 55 tons.

However, nearly 17.8 tons of payload were sacrificed in order to achieve the recyclability of the core level 1 and 2.

There are gains and losses, and this is the price to be paid for a recoverable launch vehicle.

……

Dong Xiande thought for a while and said: "Lao Chen, you arrange the test as soon as possible, and I will go to the satellite assembly company and arrange for personnel to go to Shanmei." ”

"It's a matter of duty." Chen Yao nodded.

Dong Xiande, who was about to leave, suddenly stopped, turned around and said, "By the way, there are two groups of new researchers and engineers coming over in March, and the number is about 500 people. ”

"500 people" Chen Yao was surprised, and Li Guoqing on the side also looked weird.

Add 500 researchers and engineers at one time, where are so many researchers and engineers in the country

I have time to be researchers and engineers in the field of aerospace, and the vast majority of domestic researchers are concentrated in aerospace science and industry.

"It won't be a student soldier," Li Guoqing asked in a cold sweat.

Dong Xiande spread his hands helplessly: "300 are college graduates, and 200 are transferred from the army." ”

"My God......" Li Guoqing covered his forehead and smiled bitterly.

It turned out that the so-called researchers and engineers were a group of novices, and Li Guoqing and Chen Yao suddenly felt their scalps tingle.