This star is going to the moon

Chapter 184 I came prepared, but regrets came with Mars exploration

Even though it was Saturday, the morning cafeteria of the Blue Star Aerospace Company was still crowded as it had an important mission.

But it was a little different from usual. There was something wrong with the way Yu Xingchen looked at Lu Yun.

Lu Yun couldn't stand it anymore after taking a few bites of food, so he asked, "Old Yu, what do you mean?"

"If you have something to say, just say it. If you have something to say... just keep it to yourself. I'm having breakfast right now."

Upon hearing this, Yu Xingchen immediately asked, "Did you watch the news this morning about the Chandrayaan-2 mission?"

"I saw it," Lu Yun said calmly while eating a bun, "It's just a failure, it's normal, I'll try again next time."

normal?

Failure is normal, but the percentage is abnormal!
Yu Xingchen couldn't hold it in any longer: "Mr. Lu, the key point is '95%'. The 95% you mentioned before should not be the success rate, but the failure rate, right?"

"Even...how did I come across this number? It's amazing."

Lu Yun complained in his heart: It’s not magical at all.

And he wasn't talking about the failure rate.

When it comes to space missions, there's no such thing as a success rate percentage. Generally speaking, success is success and failure is failure.

To put it simply, Chandrayaan-2 must have really landed on the moon, regardless of whether it was lying down, standing up, or even upside down.

As long as some signals can be transmitted back, we can say that we have achieved a certain percentage of success.

After all, this incident was recorded in a private space company's moon landing mission a few years later in the previous life.

Some of them were lying down, some were upside down, and although their working hours varied, they all took at least one photo of their "landing" and sent it back.

However, Chandrayaan-2 lost contact directly at an altitude of two kilometers from the lunar surface, and no information was transmitted back, which was a complete failure.

After all, the core of Chandrayaan-95 is to land on the South Pole of the Moon, conduct various experiments, and then release the lunar rover. If none of these tasks were completed, only Sri Lanka can say "% success".

However, when Lu Yun heard Yu Xingchen ask this, he was secretly happy, because he came prepared.

He thought about the wording after he blurted it out earlier.

"Actually, Sri Lanka didn't say the death rate was 95%. That was a headline given by the media. They said 'the entire moon landing process was 90% to 95% successful.' That's actually similar to what we say '95% to %'. The same applies to my casually mentioned '%'."

"Of course, as you said, the reason why I think it has a high probability of failure is that there were actually signs of it."

Hearing this, Yu Xingchen perked up: "Oh, tell me in detail?"

Lu Yun didn't elaborate, but instead asked, "What do you think is the key to the successful lunar landings of the Chang'e 3, 4, and 5 missions?"

"Landing core?"

Yu Xingchen feels that there are many answers to this topic, and in China, the answer often involves the role of people, such as the close cooperation of scientific researchers.

But here...

Yu Xingchen suddenly had an idea: "It's the 7500N variable thrust engine YF-36!"

"Snapped!"

Lu Yun snapped his fingers: "That's it!"

The YF-36 is a variable thrust engine with high specific impulse and high control precision for spacecraft. It uses a pintle-type flow regulating device to precisely control the flow in the oxygen, combustion and cooling paths respectively, achieving continuously variable thrust with a thrust variation range of 1500~7500N and a thrust control precision of 6.25N.

Its breakthrough technologies such as large-ratio flow regulation, adaptive regulating injector, and large-diameter thin-wall nozzle spinning have greatly promoted the development of domestic liquid rocket engines and related technologies.

The national aerospace agency, which has always been conservative, evaluated it as "the comprehensive performance has reached the world's leading level."

It is not just an "advanced level" of similar level, but "leading level", which shows how terrifying it is.

This not only ensured the success of the Chang'e-5, -5, and - missions, but also the future success of the Tianwen- Mars exploration mission and the Chang'e- lunar sample return mission. "India's Chandrayaan- lacked variable thrust engine technology, so its lander was equipped with five small engines. The goal was to achieve precise control of the thrust for landing by switching each of the five engines on and off."

"This incredible operation requires extremely advanced soft landing autonomous guidance, navigation, and control technologies, even more advanced than those required for the Chang'e mission."

"Unfortunately, judging by the numerous papers they've published, they don't possess this extremely niche and extreme technology..."

Yu Xingchen knew the reason without having to listen to what was said next.

In fact, these are all public information. You can summarize them by searching on a large scale first and then carefully screening them.

But just like Lu Yun’s “Technology Integration Theory”, it is easy to say but very difficult to do in reality.

And the reason why the Indians are forced to do this is because they have poor skills, but they are very gambling and want to beat the Chinese.

The initial Mars exploration bet was a success, and it tasted the sweetness, and it couldn't stop.

Eight years ago, China and Russia cooperated on a Mars exploration mission. As a result, the Russian rocket malfunctioned, and its Mars rover, along with China's "Firefly-1" Mars rover, plunged into the sea.

Two years later, Bharat won the bet, and its Mars probe entered the orbit of Mars, making it the fourth country in the world and the first in Asia to successfully conduct Mars exploration.

The reason why it is said to be gambling is that the total mass of its Mars rover payload is only 15 kilograms.

There are five instruments in total, and the most productive one is a camera.

The "Firefly No. 1" has eight instruments, two of which are cameras!

This is a huge regret for the older Chinese.

But on the other hand, it was the old Chinese who joined the game and made Ah San fall in love with competing with them, and in order to win, he had a strong gambling nature!
This time, its Chandrayaan-2 failed, which dealt a heavy blow to its national self-confidence.

Then the Chinese side will launch the second cabin of the Tiangong space station at the end of the month, and the third cabin in March next year. By then, the basic model of the first phase of the Tiangong space station will be completed.

The most important Chinese Mars mission is also coming, and Tianwen-1 will be launched in July next year.

Unlike India's orbital exploration which only launched a camera, Tianwen-1 is a super large project that completes "orbiting, landing and patrolling" in one go!
Today is Saturday, and there are still many people working at Blue Star Aerospace, after all, there are too many tasks to take on.

However, Chief Engineer Lu Yun is not that busy, because after mastering some key technologies, his subordinates will take care of various chores.

So the burden on Lu Yun's shoulders was carried by others below him, and he could still go on a date with An Fangfei on Sunday.

So after solving a key problem in the afternoon, Lu Yun left the company in the envious eyes of Yu Xingchen.

But Lu Yun had no idea what was waiting for him.

At first, An Fangfei took him to the mall and bought him a set of clothes.

Because Lu Yun is a person who doesn't care much about clothes. When he was concentrating on being a star, Liu Chun brought a makeup artist to dress him up. Since his work focus shifted to aerospace, no one cares about him, so it's very simple for him to dress himself - as long as it's clean.

Of course, the main reason is that he is handsome, so whatever he wears looks fashionable and stylish.

Of course, An Fangfei's clothing style is also...

Anyway, “birds of a feather flock together”, and both of them can hold up the clothes with their looks.

An Fangfei was just experiencing what a girlfriend should do for her boyfriend.

One of them is buying clothes.

After they had dinner, An Fangfei took out two more movie tickets.

"Let's go watch The Legend of Luo Xiaohei together."

"Let me tell you, I really like this cartoon. Its creator was also very inspiring. He made the animation for 3000 yuan..."

Lu Yun: “…”

(End of this chapter)