Scholar’s Advanced Technological System

If you want to understand the difference between the advantages and disadvantages of electric propulsion and chemistry, you must first understand the concept that a junior high school student understands. That is acceleration.

On a shorter distance scale, because of the large thrust of the chemistry propulsion method, the spacecraft can reach a very high speed in a short period of time, so overall it is more dominant in flight time.

However, if the distance scale is enlarged to one million kilometers or even tens of millions of kilometers, it is another situation.

Although electric propulsion can not be promoted to chemistry, the working medium can be ejected in a short period of time in exchange for a huge thrust, but through continuous acceleration, with a large specific impulse, a speed far greater than that of the chemistry rocket can be obtained. Maximum value.

Therefore, for BFR rockets, it takes 3 months to travel to Mars across tens of millions of kilometers.

But for the Xiaguang, which starts directly from the lunar orbit, one month’s time is enough.

In the case of missing the optimal launch window of the Hörmann transfer orbit, if the relative position of Mars and Earth is at the optimal launch position, it may not be enough for one month to complete a journey from the moon to Mars. flight.

In a deep and deep dark space, the Xiaguang, which is the astronaut of the Yuegong station, is delivered to the destination, and the completion of the working medium is slowly separated from the Moon Station.

Sitting in the cockpit, Xu Zhenghong reached out and pressed it on the helmet, reporting to the ground command center with a clear voice.

“Here is the Xiaguang, we have completed all flight missions and requested the next step.”

“This is the ground command and command center. Congratulations on completing all the missions. Now please switch to cruise mode and wait for the next step.”

“Received, switching to cruise mode.”

Sitting in the co-pilot position and looking at Xu Zhenghong who switched to the cruise mode, Liu Wei casually asked.

“Do you not return directly?”

“The ground command let us wait.”

“Because those Americans?”

“Yes.”

Speaking of this matter, Liu Xin’s heart can’t help but feel a bit of emotion.

About two or three months ago, they had seen each other far from the Earth outer space track.

When I didn’t have time to say hello, I watched them fly far.

I didn’t expect to see it again right now, but in this form.

Silence continued in the cockpit for a little while.

Just when Xu Zhenghong half closed his eyes and was about to sleep for a while, the signal light in the cockpit suddenly flashed a little.

Liu Wei opened the door and reminded: “The signal from the ground command center.”

“I saw it,” opened his half-closed eyes. Xu Zhenghong sat up from the chair and reached out and pressed it on the helmet. “Here is the Xiaguang, going to the scheduled airspace, ready to switch routes…”

The blue arc is sprayed from the five-seat electric propulsion engine of Xiaguang, dragging the spaceship of silver and heading for the distant and innocent Xinghai…

……

15 minutes ago.

In this dilemma, the White House finally made a choice. At the same time, the Chinese Ministry of Foreign Affairs received a call from the United States from the President, and on the phone, the US President formally submitted a request for assistance.

A few minutes before 10, the news reached the Nanjing Space Launch Center, and the staff who finished the navigation work immediately returned to work.

At about the same time, the Xiaguang, which was performing the mission on the lunar orbit, received the news and immediately started the preparatory plan. After the completion of the supply of the working and livinglihood materials at the Moon Palace Space Station, it was calculated along the ground by the ground command center. The waterway went to Mars.

From the time of receiving the rescue request to the rescue team, it is less than 15 minutes before and after.

At this moment, World once again witnessed the efficiency of China.

At the same time, the Lunar Track Construction Committee held a press conference at the Nanjing Hotel, which publicly reported the latest progress of the rescue operation to reporters from major media.

This move almost did not put the United States vomit blood qi.

Say good low-key work?

How can I even ask the reporters!

Originally, the White House was planning to handle it in a low-key manner. As a result, it was not expected that the Huaguo side would directly operate in a big way, and it was also a press conference to report the progress of the rescue to the community.

In particular, the rescue program launched within 15 minutes, suddenly let NASA Ares plan ground command center staff a red face.

It took them three days to analyze the various options and the possible outcomes, but none of the responsible people told them that they could not save, so that they missed the best window of launch.

As a result, there was no budget assessment on the other side of the country. The XVIIX minutes determined the waterway and sent a rescue team, exploding them more than one street in efficiency.

Although they also know that this rescue plan is definitely not made within 15 minutes, it may be ready before the video call, or even three days ago.

But even so, this efficiency is enough to make them far behind.

Not only that, the open and transparent and responsible attitude of China in the “humanitarian” rescue has formed a sharp contrast with NASA’s previous push and sell, and it has time to let all Ares plan the work of the ground command center. People, as well as those who support the Ares plan, feel ashamed and unable to show one’s face, and the direction of public opinion has changed overnight.

[I am ashamed of NASA. 】

[Unbelievable, if not Chinese, we don’t even know what happened to our colonists on Mars? ! The White House is planning to wait for their bodies to be weathered, and then send people up to collect their bodies? 】

[Send a rescue team within 15 minutes… God, how is this possible! 】

[Don’t tell me about the difficulty of rescue, I seriously doubt that NASA has no plans to save people! 】

[Until now, I know why the Mars Diary was stopped, not because of the high cost of communication, nor because of the sandstorm on Mars, purely because our White House and NASA want to hide the truth…]

In order to save face and show his determination to pick up his own citizens, after realizing the seriousness of the matter, the White House urgently announced that it will assume the full budget of the rescue plan.

However, the announcement had just been sent out for five minutes, and NASA received a bill from across the Pacific.

A total of 17 billion dollars.

Support scan code, installment payment.

After seeing this bill, Director Carson was almost not suffocated.

17 billion dollars!

Fuck can recreate a Xiaguang!

Is this the cash machine?

Just then, his assistant came over from the side.

“mister ……”

“what happened?”

Looking at the face of the poor face of Carson, the assistant hesitated for a moment, and said something to stop.

“A bad news…”

Looking at the mother’s mother, Carson impatiently said: “Do not talk nonsense, hurry.”

“Yes!” Seeing the boss’s impatient expression, the assistant rushed nodded and said, “…just half an hour ago, we found out on the official website of the Chinese official media that they also had a documentary program on the other side.”

Upon hearing this sentence, Director Carson suddenly groaned and felt secretly bad.

But this is not a good reason, but he can’t say it.

Opened his mouth, he asked with a reluctant voice.

“What documentary?”

The assistant smiled bitterly.

“The name seems to be… Mars Rescue.”

Carson: “…”

Except for a fuck, he doesn’t want to talk about anything now…