I ask you to build tractors, but you build rockets?.

Chapter 79 Linear Algebra

On June 6, the B-level base was completed. The engineering team from the mysterious power of the system disappeared after acceptance, leaving the engineers sent over to receive and carry out small modifications.

On July 7, more than 22 former C-level base employees and an equal number of newly recruited apprentices have entered the post and put some equipment into working condition.

When Lin Ju arrived, the wasteland he saw at the end of last year had completely disappeared, replaced by a giant aerospace manufacturing base covering an area of ​​5000 acres, with complete facilities and two runways.

Even if all the people that can be poached from the partner universities are brought here to work, the current number of people in the B-level base will not reach 300, and it needs to desperately expand.

Currently, the only parts in operation are the high-altitude test bed of the engine experimental department, a final assembly line and the silicon carbide chip automatic production line. It is expected that more than 25% of the equipment and machines will be operational next month.

Lin Ju had the illusion that the snake could swallow the elephant, because as long as all the production power of this base is mobilized, four heavy-duty launch vehicles like Xinyuan-50 can be produced at the same time, with a manufacturing cycle of [-] days, an average of less than half a month. pieces.

Following the signs in the factory to find the huge and advanced aero-engine test bench, Lin Ju discovered that work was already underway here.

It has a small bypass ratio. At first glance, it looks like the air inlet of the XW-9 high-thrust turbofan engine is connected to a wind tunnel that simulates high-altitude high-speed airflow. The nozzle at the tail converges and spits out a long blue tail flame.

Compared with its original purpose of the WCR-9 combined engine, the jet part of the XW-9 has very little changes, so in the test data that Lin Ju saw from the test bench, the performance was fully in line with expectations.

为了适配高空高速环境，XW-9的涵道比只有惊人的0.29，连F22使用的F119发动机涵道比都在0.34左右。

Even with such a small bypass ratio, the XW-9 can still achieve a maximum output of 14.4 tons of thrust in the afterburner state. Although it is not the highest in the world, the advantages of its small size and adaptability to high speeds are unique.

When an aircraft flies above 28000 meters, thrust is no longer the most influential factor. Instead, aerodynamic resistance and thin air cause the engine to easily surge, reduce power output, and even stop.

The best application targets of XW-9 are aircraft that fly at high altitude and high speed for a long time, such as supersonic passenger aircraft, supersonic bombers or medium-sized interceptor aircraft.

As for the XW-10 that increases the bypass ratio and enhances the thrust without afterburning, there are too many changes. It is still in the design stage and we will wait until the team is familiar with the XW-9.

After leaving the aviation department, Lin Ju continued to walk around the base. When he arrived at the runway, he saw a row of things on the tarmac that were very inconsistent with the architecture:
A row of large agricultural machinery including wheeled tractors, crawler tractors, cotton combine harvesters, cabbage harvesters, corn harvesters, etc. were parked neatly on the apron.

Seeing his own employees there, Lin Ju quickly drove over and asked what was going on.

"Boss, it turns out that before the tractor factory was upgraded, there was a backlog of agricultural machinery and accessories. Later, they were piled in the open air and no one cared about them. Then we repaired these agricultural machinery and assembled the accessories and assembled almost ten units. We can transport them to a small place over there. coming."

"What do we need all this junk for? Which department are you in?"

Lin Ju was confused, but when he asked, these were actually the people who worked with Xin'an on the XW151 intelligent driving system, and when they saw the agricultural machinery, they actually wanted to make intelligent agricultural machinery.

Although the working sites of tractors and cars are very different, making intelligent unmanned agricultural machinery is much simpler than cars. The biggest site changes and base station problems are much easier, so they are considered an unimportant branch.

Perhaps to reminisce about the past, Lin Ju climbed up and tried a wheeled tractor, and then he was speechless while grabbing the gear handle and interior trim made of rocket titanium alloy scraps.

Forget it, if you have money, just make whatever you want.

……

At 23 a.m. on the 10rd, Progress’s second space live broadcast and the first lecture officially started.

China’s last space lecture was the Tiangong-2013 mission in 8. It was watched by more than 6000 schools across the country and nearly [-] million primary and secondary school students, which caused a huge response.

Although there was a great response this time, it was far from the spectacular scene of 6000 million students.

Because what Zhou Rui is talking about is mathematics... linear algebra.

Yesterday's live broadcast was a small space experiment suitable for all ages, including drinking water balloons floating in the air, observing a spinning top in weightlessness, and showing bean sprouts that had just broken ground in space.

There is live streaming on campus, but it still only cooperates with most primary and secondary schools that cooperate with the Sichuan Department of Education, and the effect is still very good.

The next day was a live webcast for all universities. Zhou Rui originally wanted to talk about sensors in his field, but he heard last night that a large number of department lines were down, so he decided to use this unique way to wake up everyone's awareness. Enthusiasm for learning mathematics.

The ground center said it didn't matter. They were not the National Space Administration anyway, and there were no rules for astronauts' actions.

So after watching the live broadcast at Nanjing Institute of Technology and many universities, they saw a kind-faced Zhou Rui leading the trio to introduce themselves first, and then Deng Lei and Zhao Xiaowen grabbed a whiteboard and supported Zhou Rui. .

Zhou Rui picked up the pen and wrote the words "First Lecture":

"Hello, dear students, today our space lecture content is: Linear Algebra Lecture [-], Determinants.

Determinant is a very important concept in..."

"Cough, cough, cough!"

In front of countless computer screens, the students who had just been tortured by mathematics felt that their breathing had stopped and their vision went black.Before the broadcast, everyone thought that space live broadcast was interesting, and they would definitely see many novel experiments and unique physical phenomena. The result is:
The floating college teacher is leaning sideways, dangling back and forth while teaching linear algebra, and occasionally leaning on the bulkhead?
Why does it feel like the old TV has no signal and the icons are wandering around the whole screen?
Although the live broadcast content made countless people drowsy after listening to it, few people were willing not to watch it with the blessing of BUFF from space classes, and they just finished watching the two hours of non-stop online live broadcast class.

When Zhou Rui ended the live broadcast and learned from the feedback from the ground that the number of viewers had not changed much, he was very happy and felt that his teaching method was novel and effective.

"Xiao Zhao, why don't you just give a lecture for tomorrow's live broadcast? You'll talk about Chapter 2. I'm not familiar with the rest."

"Teacher Zhou, is this not good?"

"You have to trust the experience of the old teachers! Come on, let's finish the experiments quickly. There seems to be something wrong with a few culture media. Please spend more time preparing lessons before going to bed. Look at the quality of students over the years. How can we contribute to the country if this continues?”

"Hey...if that's the case, that's as well."

"..."

Commander Deng Lei had no interest in the two men discussing how to persecute the fragile minds of college students. He just floated to the porthole at the front of the plane, picked up a camera and kept taking photos of the starry sky and the earth.

There is no extravehicular component in this mission, but the extravehicular spacesuit is ready, and the next time the Unity is driven, it will be able to exit the vehicle.

Only then will he truly experience the magical feeling of being enveloped in darkness and suspended in space: this is what astronauts who have already left the spacecraft told him.

But what they didn't know was that a screenshot from the live broadcast had begun to spread on the Internet at an extremely fast speed.

Searching for the keyword "China's Space Class" on YouTube, the number one video has been played more than 400 million times and was released less than 7 hours ago.

The cover is the most hilarious. Zhou Rui and Zhao Xiaowen are surrounding the whiteboard. On it is linear algebra, which is painful for college students all over the world. Commander Deng Lei is holding plastic-wrapped black tea and silently hiding in the cab to observe the stars.

The cover's headline reads: "The Most Boring Space Lesson Ever."

The space lectures in 2013 not only caused a sensation in China, but also a large number of "demolish it, demolish it, demolish it" in the aerospace section of the Internet.

Although both Aramco and the former alliance had sent people into space decades ago, broadcast the first spacewalk, and built a large space station, they were limited by the fact that there was no Internet in the world at that time, and the quality of television broadcasts was not good. , the impression on the new generation is not profound.

Therefore, China's aerospace industry has attracted much attention, and the wall in 2015 was not so strict, and there was still a lot of exchanges.

After the Lin Ju rocket is launched, I like to look through the oil pipes and Little Blue Bird to see what these foreigners think.

"The space shuttle is unreliable. The Gaganyan plan will be implemented next year. Our spacecraft will not only be more advanced, but will also undertake the ISS astronaut transportation mission."

This was the first high praise comment that Lin Ju saw. If he looked carefully, he saw that it was from India, so that was fine.

The Jagangyang plan was proposed for implementation in the 70s, but it had disappeared a full 50 years before Lin Ju traveled through time. It is an illusion to say that its implementation next year will be the same as the H-20 flying tomorrow.

Look at the next one:
"Rough and made in China, H2A is strong and powerful (an inferior Chinese knock-off, not as powerful as the H2A rocket)"

Well, it seems that the Japanese are living a good life after eating too much seafood in Fukushima. The nuclear wastewater from 2013 to now is enough to mutate living things.

No, nuclear wastewater has not been discharged into the sea yet.

Lin Ju recorded in his memorandum the prevention of nuclear sewage discharge, and decided to find a way to prevent it in the future. If the Ministry of Foreign Affairs dared to say that it should be discharged into the sea, the rocket would fail to launch and fall eastward.

"H1 copied Aramco's space shuttle! Progress is a poor imitation of Endeavor, a knockoff made with knockoff parts!"

"Xiongfeng Missile is no longer the best in the world, mainland companies are better than us."

"Love comes from Tanzania, can China send African astronauts into space?"

"Stealing former Alliance technology, ***"

"I don't want to read mathematics at all. Why are there no silkworms spinning silk?"

Most of the remaining comments are about a bunch of demons dancing around, and a few are more interesting. In fact, many of Lin Ju's comments on YouTube can be understood without translation. Traditional Chinese characters are the most common comments on this type of video, but they are also the least interesting.

Let’s take a look at Little Blue Bird again. The first post below Ma Yilong’s latest news is a mockery of his Dragon spaceship. Lin Ju thought about it and gave Ma Yilong a thumbs up and commented in trumpet English:

"Come on, the Dragon spacecraft is better than H1, we must stick to it."

A few hours later, Lin Ju logged into Little Blue Bird again and found that Ma Yilong had replied to him, a simple thank you and an emoticon.

Take a screenshot and save it for later. When you have a duel with Lao Ma in the octagonal cage, take it out and make him laugh out loud!

(End of this chapter)