There were no reporters on Lao Ma's trip to Qiongzhou, so the atmosphere seemed quite relaxed.

The station for the launch of the Mengtian experimental module was next to the Xinyuan launch site, so Lao Ma was not in a hurry to go, but was taken by Lin Ju to visit the Xinyuan launch site first.

In the assembly building of Xinyuan's No. 2 station, he saw the first stage of the Xinyuan-3 rocket that had just completed the launch of the axial module of the Qianjin space station and had just completed part of the maintenance work.

11 meters in diameter, 77 meters in height, because the surface has not been covered with thermal insulation tiles, so there are still heavy ablation marks.

Standing at the bottom of the rocket, level with the 19 K380 engines suspended in the air, the old horse reached out and touched the nozzle that emitted a metallic blue light, and drilled down to observe the structure at the bottom of Xinyuan 3.

Unlike the Starship Super Heavy booster with messy wiring harnesses at the bottom of the previous World Line, the bottom of Xinyuan-3 has been treated perfectly, and the rest of the engine is covered by heat shields except for the rocking mechanism and the combustion chamber to prevent the backflow of tail flame ablation.

The old horse looked at the engine for a long time, crossed his waist and said with emotion:

"The combustion chamber of the Raptor engine is not much smaller than that of the K380, but the thrust is less than half, and the specaX is already far behind in terms of engines, and even the RD181 needs two such nozzles."

Lin Ju: "We have also carried out many iterations, and about 10 K380 units will be manufactured in a batch for ultra-high-intensity testing in the early stage, so that many problems can be found and resources can be used to promote progress. ”

Due to the lack of understanding of Xinyuan's internals, Lao Ma recognized the way of rapid iteration and kept nodding:

"Yes, it takes mass production testing like a car to iterate quickly, but Lin, why is XAP still using traditional aluminum alloy rocket bodies? Although stainless steel is a little heavier, it is much cheaper, and the dry mass ratio is not so important for a recyclable rocket. ”

Lin Ju: "I am very much in favor of the stainless steel technical solution, but compared to the de facto low cost, the idea of XAP is that a lower dry mass ratio brings higher capacity, which will make the average cost per kilogram lower. ”

"Hmm......"

Lao Ma obviously noticed the difference between the routes of XAP and SpecaX, but he felt that it was not too important, such a giant rocket, the cost of the rocket body is no longer much lower.

He thought of the starship he planned, and the super-heavy booster B4 was still in the design stage, but it still couldn't catch up with Xinyuan-3.

He tried his best to imagine Xinyuan-3 as a stainless steel metal surface, and it felt as if the starship was already erected next to him.

……

"On the first anniversary of the 'Dawning Project', what achievements have been made by the moon landing operation?"

"Liu Minglu: Resolutely win the battle of 'YF77' and build an advanced and reliable high-thrust hydrogen-oxygen engine."

"The Wentian and Mengtian experimental modules were launched into orbit within two days and successfully docked, and the Tiangong space station became the second largest spacecraft in orbit."

"The number of people in space in China has exceeded 100."

"Four astronauts will return to Earth in the near future."

"Douyin, record a good life."

"Byte instigated the founder to personally go to space to bring goods for Lin Ju."

"The speed of the satellite network is much faster than 4G, is 5G still necessary?"

"Elon Musk concludes his visit to China."

In late September, a flurry of news broke out in succession.

First of all, YF77, the anxious Sixth Academy ushered in timely rain: two senior engineers of the Xinyuan Aerospace Power Department guided the improvement of YF77.

The price is not money, Xinyuan exchanged some space instrument technology from the space agency, which is more precious than money.

For Xinyuan, it is very simple to use the YF77 technology with the original gas generator cycle and medium thrust, and the Sixth Academy is mainly inexperienced, and it is good to have a little guidance in the design, and there is no absolute difficulty in the material.

Now YF90 and YF79 are still under development, even if there is no new distance, the space agency will be able to solve these problems sooner or later, it will be a favor.

Starting from YF79 and YF90, it can be said that the space agency's hydrogen-oxygen engine technology has officially entered the world-class level, at least on the same level as Aramco.

YF77, that's just the darkness before dawn.

The H240 and H80 they purchased before are most likely to be used in the construction of the lunar base after the manned lunar mission, and using these two engines as the upper stage power can increase the lunar transfer orbit capacity of the Long March 10 by about 10%, which is a lot of quality.

In addition, there are 6 astronauts who went up in March, one of the four from the Space Agency, Ke Yun, a system engineer from Xinyuan, and the rest will return to the ground in October.

For more than half a year, this is a new record for the continuous stay time of Chinese astronauts in space.

The four crew members who returned were in order to make room for the follow-ups, and they were actually in very good physical condition, and their zero-gravity life for half a year did not cause much trouble.

However, Deng Lei has something to do when he comes back, H2M has two months to make its first flight, and Xinyuan, such an expensive thing, must find experienced astronauts to press the array and conduct many test flights.

You must know that the H2 will continue to carry out high-frequency space operations for almost a year, capturing satellites and transporting "sky survey" telescopes, and the task is much more complex.

So Deng Lei himself has no reluctance to return to the ground, now he is at the peak of his body, Xinyuan is reluctant to leave the oldest astronaut on the ground, and will definitely arrange a lot of flight missions.

H2 requires a lot of manpower for each operation, and it is bound to be doped with non-professional astronauts, and it needs the help of professional players.

Although Xinyuan's space tourism service has ushered in a peak period since July, the number of people entering space has risen rapidly, but half of them are pure loads, that is, tourists, and it can only be said that the space tourism market has been fully tapped.

After the steadfast mission in July, two wealthy foreigners who had just completed a seven-day tour of the space station, immediately spent money to join the queue for a 24-hour tourist flight launched on the same day as the Mengtian experimental module in September.

Due to sufficient training and bringing their own spacesuits, this trip only cost a few million dollars per person, and the average cost of the two trips dropped immediately, making people call themselves travel ghosts.

However, the most cost-effective on this flight was Zhang Yingming, his physical condition was unexpectedly good, and after a simple training, he took a set of one-size-fits-all spacesuits in stock and went up on the day of Douyin's release.

Xinyuanguan micro-linkage carried out publicity, and attracted millions of downloads with the gimmick of the founder going to space, and then in the morning, everyone watched the launch of the Mengtian experimental module, and in the afternoon, we watched Mr. Zhang's Douyin live broadcast of the tourist flight of the Firm.

This initiative has proved to be extremely successful, Mr. Zhang was rewarded by the users of his company's APP with millions of gifts, which has caught up with the popular anchors, and many creators who have been contacted in advance have released exquisite short videos one after another, and in the first 10 hours, tens of millions of users have been harvested, and mobile users are addicted to new models.

At a time when many people realized how much short videos consumed traffic, Zhang Yingming posted a video recorded in the corner of the cabin of the Steadfast.

"Family, who hasn't used the Jingwei satellite network, gigabit broadband with you, you can use it wherever you go, the original price is 8999 per year, now open the comment area and click on the webpage to jump, enter 'Zhang total 666' on the official website of Xinyuan, and receive a red envelope of up to 8888 yuan, everyone has a share, first come, first served......"

(End of chapter)