This star is going to the moon

Chapter 125 Lunar Landing Rocket Data Model, Chang'e Launch

It’s December again, and all industries are starting to take stock, and the entertainment industry is no exception.

Even compared to other industries, the entertainment industry's various annual rankings attract a lot of attention, after all, they are always on the hot search list.

This year has not been easy for celebrities in the entertainment industry. First, Fan Bingxue's "yin-yang contract" exposed the problem of tax evasion in the entertainment industry, and then Wu Fan was arrested, which led to the "fan circle rectification". Later, there was the "toad jumping on the face" incident, and the entertainment industry was quiet for a long time.

Later, it was because Lu Yun released a video that broke the circle and attracted some attention from the entertainment industry to the aerospace industry that they tried to be active.

Now that the various lists are starting to be summarized, they have to take advantage of the last award ceremony of the year to show themselves well.

As a result, he was warned for allowing fans to interfere with the normal operation of the airport.

You have to know that the "fan circle rectification" has only been going on for two months, and the limelight has not yet passed.

This is not "the scar has healed and the pain has been forgotten", it is simply "the memory of a fish".

Of course, if they were not so "suspicious", they would not have caused so many bad things, and the entertainment industry would not have been criticized by so many people.

Lu Yun, who no longer cares about star rankings, is discussing the detailed data of the rocket with the "DY Rocket" data calibration team.

In the conference room, Zhao Yuan, the leader of the calibration team, pointed to the conceptual diagram of the "DY rocket" on the screen and reported to Lu Yun.

(I made this myself)
"...the cargo version of the 5-meter diameter bare rocket has a height of 70 meters, and the manned version is 72 meters. It uses a common bottom tank, has a takeoff mass of 750 tons, and a takeoff thrust of 1050 tons."

"Its first-stage rocket uses seven YF-100K liquid oxygen-kerosene engines, an improved version of the YF-100. Last year, the Sixth Academy completed its first complete principle verification hot test of this type of engine."

"However, if this type of engine is to be used, some improvements must be made, such as increasing the thrust from 130 tons to 150 tons, and also making it reusable. These problems are not serious, as we have the technology in this area."

"The second-stage rocket is equipped with two YF-100M engines. This is a high-altitude optimized model developed by the Sixth Academy based on the YF-100K engine. It completed its first test run in June this year and is ready for direct use."

"In this way, the bare-rod rocket's low-Earth orbit one-time carrying capacity can reach 31.5 tons. If a sea recovery ship similar to the Falcon 25.6 is used to recover the first-stage rocket, the low-Earth orbit carrying capacity can also reach tons, covering the low-Earth orbit carrying capacity of the Long March B."

"The only problem is that its first and second stages are liquid oxygen and kerosene, rather than the liquid hydrogen and liquid oxygen of the Long March 5, so its high-orbit capacity cannot compare to the Long March 5."

"However, if we use the Long March 5's maiden flight-proven 'space shuttle', the Long March 2 upper stage, which can be installed in the fairing, its high-orbit recovery capacity can match that of the Long March 5, and the transportation cost will still be much lower."

(Online picture, the upper stage is a flat shape, considered a half-stage rocket, and is only used in space)
Lu Yun nodded when he heard this. This result was similar to what he had roughly thought before, but he didn't know the exact data. Zhao Yuan's team was dedicated to refining these data.

At present, it seems that the technical difficulty of the light-rod type is not great. It uses a lot of mature technologies of the Long March 5, and not many technologies need to be upgraded and improved. Most of the upgraded technologies are already available at Bluestar Aerospace Company, and a small part needs to be solved by the relevant aerospace research institutes themselves.

According to the progress, it will be available in about two to three years.

In other words, the two types of Long March 5 rockets must be used quickly. Basically, they will be retired after launching the three modules of the Tiangong space station, the Mars probe and several practical satellites.

Although it seems a bit wasteful and not many tasks were performed after it was developed, it has accumulated a lot of technology and experience for the light-rod type, and many parts and production lines can be directly used on the light-rod type.

Moreover, the times are moving forward and technology is developing rapidly. When it is time to retire, we must do so decisively, otherwise it will be a waste.

"...the height of the cargo version of the 'DY' heavy-lift rocket is 90 meters, and the manned version is 92 meters, in the CBC configuration."

"Its takeoff mass is 2300 tons, and its takeoff thrust is 3150 tons. It uses three first-stage boosters and one second-stage rocket. The problem is the same as with the bare-barrel model, but in order to achieve a lunar orbital capacity of 25 tons in the recovered state..."

Zhao Yuan paused, looked at Lu Yun, and then continued, "It has an additional hydrogen-oxygen three-stage rocket, but we've calculated that using only the YF-75D on three Long March 75 second-stage rockets won't work. We need to upgrade the YF-D."

"It is necessary to increase the thrust chamber pressure and use a larger nozzle to increase the vacuum thrust to more than 9.4 tons and the vacuum specific impulse to more than 451 seconds."

"In that case, we calculate that the theoretical low-Earth orbit carrying capacity of the cargo version of the 'DY' heavy-lift rocket can reach 98 tons, and the recovery version can also reach 80 tons!"

"Of course, this isn't important. Just like the Falcon Heavy, they don't carry cargo into low-Earth orbit." "What's important is that this way, the DY Heavy rocket's full lunar orbit capacity can reach 32 tons, and in recovery mode it can reach 25.6 tons, meeting the 25-ton requirement you mentioned, Mr. Lu!"

After introducing these, Zhao Yuan and other staff members looked at Lu Yun with burning eyes, expecting Lu Yun to reveal the real name of the "DY" rocket the next moment, and then raise his arms and call on them to build the rocket!
Unfortunately, Lu Yun is not stupid.

This model has not been decrypted yet!
What's more, this is just a data model. Lu Yun needs to report it to his superiors and tell them that this type of rocket is basically feasible.

Only after passing the review from above can he take his team to various research institutes to ask them for the most detailed technical data, and then use the "technology integration theory" to create a detailed technical model of the moon landing rocket.

After all, this is a rocket that will carry out a manned lunar landing mission, a major national mission. It is not a rocket built by Blue Star Aerospace itself. Many things must go through national procedures, and it cannot just say whatever it wants as before.

It was already late at night when they finished talking about the "DY" rocket, and they happened to watch the live broadcast of the Chang'e 4 launch on CCTV together.

Lu Yun remembered that the launch of Chang'e 4 in his previous life was not broadcast live, but only the news was broadcast after the successful launch.

Because the Long March 5 launch failed in the previous life, CCTV broadcast the entire event live. At that time, the launch was regarded as a very good science popularization mission, and multiple reporters and multiple angles reported the entire project in a big way.

Unfortunately, the Long March 5 "Fat Five" launch failed, the scheduled follow-up programs could not be carried out, and the entire project team was under tremendous pressure.

Since then, the Academy of Space Technology has become cautious about CCTV's live broadcast of rocket launches.

This life is different. With Lu Yun's intervention, the rocket problem was solved in advance and the launch went smoothly. So even though the launch was around 2:30 in the morning, CCTV's live broadcast was still quite large.

After all, the Chang'e-4 probe is heading to the back of the moon. If successful, it will be the first time for mankind, and the significance will be very significant in various ways!

Zhao Yuan sighed, "It's a pity that the Wanhu rocket's lunar transport capacity is a bit low. Its one-time transport capacity is only 3.2 tons, which is not as good as the 3.8 tons of the Long March B. Otherwise, it would have been able to take on the mission of launching Chang'e ."

Lu Yun crossed his arms and said, "It's actually quite simple. We just need to find a suitable upper stage. That way, even in recovery mode, we can still cover the high-orbit capacity of the Long March 3B. It's just that the Wanhu rocket came out relatively late, so we didn't have time to find a suitable upper stage."

The others nodded when they heard this, and that was correct.

After the Wanhu rocket uses the upper stage, it will cover the carrying capacity of all the "toxic rockets" in the Long March 2, 3, and 4 series. It is only a matter of time before they are eliminated.

After that, when rockets are launched next time, residents in the booster landing areas will not have to hide, and the environment will not be polluted.

Moreover, those rocket models are all 3.35 meters in diameter, and their production lines can also produce some of the things needed for Wanhu rockets, so the aerospace officials are currently negotiating technology licensing with Blue Star Aerospace Company.

After all, in addition to some normal satellites, the aerospace authorities also have some confidential military satellites, and it is not convenient for private companies to launch those satellites.

If the government also produces some Wanhu rockets itself, it will be able to save the jobs of some aerospace engineers.

As for the other part…

Just in time to join the manned lunar mission!

"Hey, 30 seconds left!"

"I'm suddenly a little nervous. Do you think Chang'e 4 can successfully land on the far side of the moon? This would be a first for mankind. No one has ever done this before."

Lu Yun smiled when he heard this, looked at them and said firmly: "Don't worry, it will definitely work!"

直播：“5、4、3、2、1，点火！”

"take off!"

(End of this chapter)