It's reasonable for me to have a two-way foil for a second-level civilization, right?

As he spoke, he adjusted the radio frequency directly.

"Call the ground command center!"

"This is the Moon Palace base, and the second-generation quantum computer has been installed."

After a short wait, Fang Xu's voice came over the radio.

"Ground command center received."

"Start the computer now!"

After hearing the order, Bai Yixuan's expression became solemn, and he quickly walked towards the second-generation quantum computer after receiving the command.

"Tsk... I was fooled by him, and I was thinking of blackmailing a hot pot meal!"

Hearing Hong Fan's soft complaint on the radio, Bai Yixuan's body suddenly stopped.

This kid... wants to eat hot pot and wants to go crazy?

"All right, all right, I'll treat you when I get back!" Bai Yixuan said angrily.

Hearing this, Hong Fan and Xia Wanyi's eyes suddenly lit up!

"Wuhu!" Hong Fan called softly, "Leader, let me help you!"

"Just leave it to me for such a small matter!"

As he said that, Hong Fan jumped up and down and chased after Bai Yixuan.

……

After ten minutes.

Looking at the flashing lights on the second-generation quantum computer, Hong Fan subconsciously stretched out his hand and scratched the "glass mask".

"This... shouldn't be a problem, right?"

With some doubts, Bai Yixuan took out a document from the backpack of the spacesuit, and carefully read it.

"team leader?"

Hong Fan subconsciously leaned over to take a look.

"Second Generation Quantum Computer Maintenance and Installation Manual"

"..."

Hong Fan looked at Bai Yixuan with a strange expression: "Captain, Professor Lu must have created this thing, right?"

Bai Yixuan nodded casually while carefully comparing the colored illustrations above: "Yes, it was made by Professor Lu."

"In addition to this, there is also a Xuannv series aerospace aircraft maintenance manual, which just came out a few days ago, and it is now placed under our seats, don't you know?"

Hong Fan: "..."

Although it was a bit outrageous, but thinking that it was Professor Lu's masterpiece, he suddenly felt that everything was logical.

"Huh!" Bai Yixuan breathed a sigh of relief, reached out and clicked on a colorful illustration in the booklet, "It's all right!"

"This is a self-check. To be precise, the weak artificial intelligence inside is building a suitable system."

Hong Fan nodded half-understanding: "So...how long will this take?"

"...I don't know, and Professor Lu doesn't know about the ability of weak artificial intelligence." Bai Yixuan frowned slightly, "However, it shouldn't take too long."

While speaking, all the lights on the second-generation quantum computer suddenly went out.

In the next second, the indicator light showing the working status quietly lights up.

"Hello."

Chapter 144 Cable Selection: Carbon Nanotubes

"Hello."

Just as the three of them were looking at each other, an extremely mechanical electronic synthesis sound sounded in the helmets of the three of them.

"Damn it!"*3

Bai Yixuan was the first to react: "Are you...one?"

"Yes." The mechatronic voice sounded again, "Do you want to start the construction plan of the Moon Palace?"

Unlike Zero, One's voice was extremely rigid.

After Bai Yixuan and his teammates looked at each other, he said in a deep voice, "One, start now!"

The moment the order was issued, the entire Moon Palace base came alive again.

only……

Everything seems to be fast forwarded.

The speed of the debris collection vehicle suddenly increased several times.

Seeing the scene where the collection vehicle slammed into the moon rock in front of her, Xia Wanyi's eyes widened slightly, and she involuntarily let out an exclamation.

But in the next second, the collection vehicle drew a beautiful arc just right, bypassing the moon rock in front of it!

Not only the collection vehicle, but also the transportation efficiency of the crawler device has increased several times in an instant.

At the beginning, in order to subdivide the types of ore, the crawler transportation was a meal.

but now……

Several crawlers were running quickly without any pause. The seemingly chaotic ore sorting process revealed an indescribable sense of order.

"Fuck..." Hong Fan stared blankly at the scene in front of him, "This is too exaggerated..."

Bai Yixuan's eyes were full of amazement.

This is just weak artificial intelligence!

If zero...

He shivered slightly.

He finally knew why Xia Guo had developed so rapidly during this period of time!

……

Earth.

"Professor, One has started working normally."

Zero's voice sounded in the office.

Lu Yongchang's tightly frowned brows slowed down a little.

"okay, I get it."

"By the way, Zero, help me contact Academician Wei Rong."

"Tell him, I'll go to the carbon nanotron laboratory right away."

"Yes, Professor."

……

Carbon Nanotron Lab.

"Hello, Professor Lu."

As soon as Lu Yongchang entered the laboratory, a middle-aged man with gray temples greeted him: "Let me introduce myself, I am..."

"Academician Wei, I recognize you!" Lu Yongchang smiled and reached out to hold Wei Rong's right hand, shook it vigorously and then said in a deep voice, "The situation is urgent, so I won't talk nonsense."

Wei Rong's expression became serious for a moment: "Professor Lu, tell me."

"The problem of the cable material of the space elevator has not been solved yet."

Hearing Lu Yongchang's words, Wei Rong's expression changed slightly: "Professor Lu means...plan to use carbon nanotubes to make space elevator cables?"

Lu Yongchang nodded in satisfaction.

It is easy to talk to a smart person, and you can understand what he means with just one sentence.

"How? Is it possible?"

Wei Rong frowned in confusion.

After pondering for a moment, he nodded, then shook his head quickly.

"In theory, this possibility exists."

"Professor Lu, you also know that the tensile strength of carbon nanotubes reaches 200Gpa, which is about 100 times that of steel, but the density is only one-sixth of steel."

"In theory, this is indeed an ideal material for a space elevator."

"But...the current carbon nanotube preparation process has a big problem. Most carbon nanotubes can't even reach the centimeter level."

"Moreover, the current strength of carbon nanotubes is mainly reflected in the microscopic level."

"At the macro level, due to various reasons, its tensile strength is greatly reduced in value."

Lu Yongchang nodded slightly.

He is naturally very clear about these mechanical properties of carbon nanotubes.

After all, among room temperature superconducting materials, he chose carbon nanotubes.

However, at that time, he used the excellent electrical properties of carbon nanotubes.

After pondering for a moment, he chuckled lightly: "It's normal to have problems, as long as we solve them."

"The point is, right now, carbon nanotubes are the most likely material for space elevator cables, and that's enough."

Wei Rong froze for a moment, then nodded vigorously, with admiration in his eyes: "Well said, Professor."

……

In front of the experimental bench, Lu Yongchang silently looked at the carbon nanotube sample prepared for the first time in front of him.

The carbon nanotubes are about one meter in length and have a tensile strength of 80Gpa.

Logically speaking, this is already an extremely good carbon nanotube.

But that's clearly not enough for a space elevator.

As a necessary technology for a planetary civilization to enter the universe, the space elevator contains extremely high technical content.

One end of the elevator is on the ground, and the other end is in geostationary orbit 3.6 kilometers away. In the middle, it is only connected by a cable.

As for why it doesn't fall...the principle is simple.

It is only necessary that the centrifugal force generated by the rotation of the earth counteract or be greater than the downward gravitational force to keep the cable taut.

Of course, while maintaining the above conditions, the overall center of mass of the elevator should be equal to or higher than the geostationary orbit.

Considering the weight of the cable itself and the various transportation devices attached to the cable, the only way to keep the overall center of mass of the elevator in the geostationary orbit is to increase the mass of the counterweight at the other end, and the only way to increase the length of the cable is.

When the counterweight happens to be in a geostationary orbit of 3.6 kilometers, if you want to ensure that it does not fall, the mass of the counterweight must be infinite, which is obviously impractical.

Therefore, under normal circumstances, the highest point of the space elevator is generally about 9 kilometers from the earth's surface.

Under these prerequisites, as the most important material of a space elevator, the cables connecting the two ends need to withstand extremely terrifying tension!

Of course, in addition to the tensile strength, there are many other conditions necessary for the cable, such as stable materials, not easy to damage, and so on.

"This is already the strongest carbon nanotube produced in the laboratory." Wei Rong's voice came from the side, interrupting Lu Yongchang's thoughts.

He shook his head slowly: "Not enough, not far enough."

Wei Rong smiled wryly.

Of course he didn't know enough.

For space elevators, the tensile strength of 80Gpa is obviously not enough.

You know, even the most basic space elevator requires the cable to have a tensile strength of at least 100Gpa!

"At least 1000Gpa..." Lu Yongchang muttered to himself.

Hearing this, Wei Rong's eyes widened suddenly.

1000Gpa? !

It's like talking about a dream!