The Magician of Clow

Chapter 1192 Special Chapter The Distance From Thoughts to Starry Sky

"Using this, it is possible to build an elevator at the equator at a height higher than that of a synchronous orbit, where the two forces balance,"

Hearing Li Ze continue to explain, Fangran saw him raise his hand to draw, and a slender rectangle extending beyond the outer circle was extended from the inner circle, and the point where it intersected with the outer circle was marked as r0.

Subtle reminiscences of being at once physically dominated.

"In this part below the synchronous orbit, the radius becomes smaller, and the gravitational force formula GMm/r is relatively large, while for the part beyond the synchronous orbit, the centrifugal force formula mωr is relatively large,"

No, wait, I always feel that two very familiar formulas have appeared
Watching Li Ze mark the slender rectangles on both sides of the outer circle in red and blue, indicating that they are 'pulled' in two completely opposite directions by gravitational force and centrifugal force respectively,
Fangran, who was sweating a little, saw his last opening when he looked at him:
"Then as long as the two parts are equally stressed, the space elevator can stand in space without support."

After hearing this, Fangran felt suddenly enlightened and shocked.

"The concept of a space elevator has actually been proposed a long time ago, and the relevant principles have been relatively complete."

Lize put away the projector, and the warm light of the bonfire resumed on the narrow mountaintop, while Kerim looked at Fangran and added with a smile:

"It was about 100 years ago that Tsiolkovsky proposed this idea. The current jet rocket and staged rocket are all ideas he proposed back then."

More than 100 years ago! ?
For the era before this time, he had a deeper feeling than the two of them. Fangran couldn't believe that when he was driving the carriage through the wheat field,
Someone has already proposed a space elevator, which even today makes him feel incredible.

"Then such a good thing, why not build it?"

Thinking about the series of advantages and meanings the two of them just said, the principle seems to be quite feasible, Fangran asked strangely,

Knowing that he would definitely ask such a question, Kerim and Lize looked at each other, as if they were discussing who would explain.

"Because of the tensile strength of the material."

In the end, Kerim answered aloud. He recalled the relevant details he knew as much as possible, and explained softly and helplessly:
"At the same time that gravity and centrifugal force are balanced, a very huge tensile force will be generated. To meet the requirements of the space elevator, I remember that the specific tensile force per unit area needs to be greater than the material density multiplied by that."

"Okay, just give me an example."

I always feel that he is recalling a number that he does not understand the origin of when he said it. In the middle of the night, he faces four people who are more knowledgeable than himself all day long.
Fangran was used to speaking without any fluctuation.

"Haha, if you use the density of steel as an example, it would take about 400 million times the atmospheric pressure, that is, a steel cable as thick as a thumb to lift 4000 tons of weight,"

"But the actual steel cable can only do one-thousandth of the level, and its density is too much."

Hearing what Fangran said, Kerim couldn't help laughing and gave an example directly.

"Does that mean it's stuck on the material?"

For such an answer, thinking of the problems he faced not long ago, Fang Ran had no choice but to develop something new, the material is always a problem.

"It's not completely stuck on the material. In fact, a material that can satisfy the space elevator has been discovered now,"

Already discovered new material?

Surprised that he didn't get stuck on the material, Fangran looked at Kerim unexpectedly, and saw him smile and say a name.

"Carbon nanotubes, the material has excellent tensile strength, and its density is only one-sixth of that of steel. It can already be produced with the current technology in reality."

"No, wait a minute, since you've discovered the material and you've never heard of it, you must be going to say that this material is either ridiculously expensive or labor-intensive to make."

Not happy too early, keenly aware of the strange place, digging out relevant memories from the remaining knowledge of high school, the bonfire crackling,
Fangran looked suspiciously at Kerim and asked silently:
"I remember that the synchronous orbit seems to be more than 6000 kilometers. Adding the above paragraph, how many carbon nanotubes can be produced?"

"Half a meter."

Fang Ran: "."

Hey, good guy, it's still about rice.
He was speechless, staring at Kerim unable to speak,

half will,

Only then did Fangran burst out laughing. He covered his stomach and looked up at the Milky Way above his head. For some reason, he couldn't help laughing and complained:
"Banmi. Pfft, my god, half a meter is too ridiculous, hahahaha!!"

"I remember this was made by a laboratory in your Huaxia."

Knowing that this is still at the laboratory stage, it is indeed a bit far from what they just said, Kerim couldn't help but feel helpless,

Even Lize beside him laughed a little.

"At least in terms of ton production, it still gives me some hope."

I don't know why I'm smiling so happily, Fangran wiped the corner of his eyes and looked at Lize and Kerim, it turns out that this is what they both said to be "more realistic",
Half a meter is more than 6000 kilometers, the difference is not even a star.
But thinking about the light-speed engine that has no theory about deep space navigation, the half-meter that has been completed is indeed more realistic.

Thinking that even the first step into the universe, space exploration at a distance close to the earth, is still half a meter to tens of thousands of kilometers away,

At this moment, looking up at the Milky Way,

Only then did Fangran truly understand the distance to the starry sky above his head,

Even the solar system cannot travel, how far away is the Milky Way with hundreds of billions of stars, and the local group of galaxies to which it belongs, and even the upper Virgo and Laniakea superclusters.
But thinking that more than 100 years ago, when there were no rockets, someone had already proposed the idea of ​​a space elevator.
And suddenly feel that this distance does not seem to be eternal and unreachable.

"Speaking of which, in reality, the length of half a meter can be made. If it is replaced by the technological level of the night battle, can a space elevator be made!?"

As if he suddenly thought of something beyond reality, Fangran mentioned this and asked with bright eyes.

"It's not that simple. It's true that night battles have a higher level of technology than the reality, but most of the fragmentation is biased towards weapons and mechanical development, and there may not be related technologies,"

As an elite technologist, Li Ze shook his head and said the most important reason while looking at the Milky Way starry sky above his head.

"And no one knows whether the night battle technology will flow into reality, and whether it will be a space elevator."

"That's it, eh! By the way, is there anything else?"

After the young man seemed to be stunned, he curiously questioned his knowledgeable companions again,

In the midnight full of fantasy, discussing the topics of technology and starry sky,

On the narrow mountain top like an isolated island in the sky, three young people sat on the tree stump around the bonfire, yearning for the distant starry sky of the magnificent Milky Way above their heads because of curiosity,

The enthusiastic discourse of the young people has been going on for a long time in the fairy mountain night,
And the scene at this moment is the two birds that were jumped to the camera, because they were curious and pecked the shutter to record
　I owe one chapter, I still owe 4 chapters

　　
　
(End of this chapter)