After the plane took off, it quickly flew out into the boundless sea with an "elevator". Pen % fun % Pavilion www.biquge.info

Although it was night, it was not pitch black outside, and the sea in front of the plane was covered with a veil of light, but this was not the reflection of the moonlight on the sea, but a pillar of light that shot directly into the sky from the ground in the far distance in front of the plane was reflected in the water.

Seeing this pillar of light that broke through the sky, even if he didn't query it through the Star Spirit Network, Lu Ze instantly understood the working principle of the space elevator.

Instead of letting the elevator climb along the electromagnetic track, a high-power laser is launched from the ground to "shoot" the space elevator up!

In fact, as long as they do a little calculation, they know that even if the "elevator" they are riding now can move in a vacuum tunnel and has its own air circulation system, theoretically it is no problem to enter real space, but it is simply unrealistic to want to ride it into synchronous orbit.

It's all about speed.

You know, even if this "elevator" moves horizontally, the speed is only 1,200 kilometers per hour, although it is fast compared to past trains and even airplanes, but at this speed it takes at least 30 hours to reach the geosynchronous orbit 35,860 kilometers above the earth's surface.

If you also consider that the path to geosynchronous orbit is a vertical upward motion and you have to overcome gravity, then the speed will only be slower, and it may even take more than a week to reach geosynchronous orbit.

For such a long time, how to solve the problem of eating, drinking, and Lazar of the people in the elevator?

In fact, even without taking this into account, it would be impossible to build a vacuum maglev tunnel from the surface of the Earth to a direct synchronous orbit - a building of this magnitude would not be able to resist the tearing of tidal forces.

Therefore, the real space elevator is actually a 36,000-kilometer-long cable-like building hanging down from the space station in geosynchronous orbit.

One end of the cable is fixed to the Earth, and the other end is fixed to the space station in geosynchronous orbit, which rotates around the Earth at a very fast speed, because of the centrifugal force, it will give the cable a great pull force to ensure that the cable is tight. The station is usually built a little farther in the geosynchronous orbit to ensure that the center of mass of the entire space elevator system, including the cables, falls in geosynchronous orbit and thus remains relatively stationary from the ground.

Of course, this cable is not used to allow the elevator car to climb up with it, and the energy that allows the elevator car to overcome the gravitational potential energy comes entirely from the high-power laser launched from the ground.

However, there is another problem: the laser can only provide vertical and upward thrust to the elevator, but cannot provide the elevator with horizontal kinetic energy.

The Earth rotates 15 degrees per hour, and when the elevator car is on the surface of the Earth, its linear velocity around the Earth is 463.31 m/s, and when it reaches a geosynchronous orbit 35,800 kilometers above the Earth's surface, its linear velocity around the Earth will also reach 3,075 m/s, with a kinetic energy of 44.1 times that of the Earth's surface.

Therefore, it must have a uniform horizontal acceleration in the process of ascent, and this acceleration is provided by the electromagnetic repulsion between the elevator car and the cable.

Due to the interaction of forces, the elevator car will also give the cable a horizontal force, which will be conducted along the cable to both ends, and eventually give a pull to the base station located on Earth and the space station located in synchronous orbit. This results in a loss of speed and kinetic energy for the space station and a reduction in orbital altitude.

In order to prevent this from happening, the space station must also continuously accelerate during the elevator ascent, and the elevator must continuously decelerate during the elevator descent. Of course, although this point is troublesome, it can be completely handed over to the Star Spirit Network, and this little bit of energy is insignificant to humans who have mastered controlled nuclear fusion.

The greatest significance of the space elevator for human beings is actually to completely get rid of chemical rockets.

In fact, most of the energy spent on pushing the rocket's own fuel to launch something into space with a chemical rocket is obviously not conducive to the development of the space industry.

Even if a fusion engine can be installed in a spaceship, it is impossible for the spacecraft to break free from the earth's gravitational pull from the surface of the earth and enter space.

So turning fusion energy into lasers and shooting elevators into space from the ground has become the best option.

At present, mankind has built a total of 28 space elevators, of which only 16 elevators are built on land, and the remaining 12 elevators are located at sea.

The reason for this is to facilitate the transport of water into space.

Today, there are 11 million humans living in space cities and the moon for a long time, and all the water they need to live their lives is transported from the earth.

Lu Ze once saw a saying in science fiction novels - it is better to suck water up from the surface of the planet than to transport it directly from the other side of the universe.

This argument is not unreasonable, because the gravitational constraints of the Earth are so strong that it takes a super-large rocket to launch a person from the Earth into a geosynchronous orbit, and a small capsule is needed to get from the geosynchronous orbit to the Moon.

If rockets are still used as a delivery vehicle, then it is better to carry so much water from Earth to orbit than from other planets in the solar system, such as Europa.

But with the space elevator, it's different.

All the energy to overcome the earth's gravity is provided by the base station on the ground, and using lasers as the propulsion force of the elevator will certainly bring a huge waste of energy, but now the last thing that human beings lack is energy, and the hydrogen isotopes in the entire ocean are fusion energy.

The time it takes to transport water from other planets will be calculated in years, and since there is no need to worry about energy, it is undoubtedly more convenient to transport water directly from Earth.

After so many years of development, the water transported to space is now more than enough to recycle the needs of all humans living in space cities and the moon, so these space elevators built at sea that were originally used to carry water have begun to take on the task of transporting tourists to orbit.

And Lu Ze and Lu Li went to such a space elevator where the base station was built on the sea.

In this way, Lu Ze browsed the knowledge related to the space elevator all the way, and about half an hour later, a huge floating island in the sea appeared in front of the plane.

Looking at this floating island from afar, Lu Ze suddenly remembered the Noah's Ark recorded in the Bible, but this floating island is much more than the mythical Noah's Ark.

The entire floating island has a square structure, with a side length of about 2 kilometers and a height of 70 meters on the water, and the reason why it is so high is not entirely dependent on the buoyancy generated by the seawater, but also the pull of the space elevator cable on the floating island.

The laser is emitted from the center of the floating island, and after the scattering of air, the entire surface of the floating island is brighter than daylight, and the glass of the elevator automatically darkens at this time, partially blocking the light.

The plane continued to approach the floating island, but instead of stopping on the surface of the floating island, it flew in through a hole in the side of the floating island.

It is conceivable how strong the light emitted by this pillar of light, which can be seen hundreds of kilometers away, although the laser does not directly heat the air into a plasma state, but it is not far off. As a result, the surface environment of the floating islands has become completely unsuitable for human life.

After passing through a short tunnel, they entered a large space.

The space was also lit by light emanating from the walls, and at least a thousand of the same planes were neatly parked inside.

And Lu Ze's plane had not completely stopped, but another similar plane drove in from the tunnel they entered, which shows how large the flow of people in this space elevator is.

When the plane came to a standstill, the "elevator" automatically detached from the plane, went down into a complex maglev track network, and after turning a few corners that made Lu Ze dizzy, it was finally on a platform in front of a gate.

The "elevator" door opened, and the two finally arrived at the destination of the trip.

Looking at a row of words written in human language above the gate in front of him, a strange expression suddenly appeared on Lu Ze's face: "Wait...... Ladder...... Hall? ”

Yes, if translated into Chinese, this type of character is three words: waiting hall.

Although Lu Ze knew that taking the space elevator would definitely not be as convenient as this maglev elevator, the way the laser propelled determined that there could only be one elevator car movement at the same time, and waiting was inevitable, and these words were just to illustrate the function of the front hall. But Lu Ze still couldn't help but compare it with the "waiting hall" in the previous airport.

It's just that the word "machine" is replaced by the word "ladder", why does it feel like the grade has been reduced so much in an instant!

Although the actual technical content of the space elevator is not known to be many levels advanced compared to the aircraft.

Just when Lu Ze stopped in front of the door, another "elevator" arrived behind, Lu Ze looked back, and saw a girl who looked about fifteen or sixteen years old coming down from the "elevator".

She wore a hood on her head, and the coat draped behind her moved without wind - it was really a windless coat that moved on its own, and it looked cool.

Although Lu Ze had never seen this costume, the first time he saw the hood, he had a feeling that this must be a character in a work he hadn't seen before.

Then a metal box came out of the "elevator", and followed the girl steadily and moved forward automatically.

Lu Ze couldn't help but take a look at it more, and thought to himself, it's quite convenient to have such a box, not only can you take the items in the box at any time, but you don't have to carry it yourself, I will also get one in the future.

At this time, the hooded girl suddenly stopped and looked at Lu Ze, as if she had discovered an alien: "You, you...... You are Lu Ze! ”

However, at this time, Lu Ze's attention was still focused on the box, and he saw that the box was still driving forward at its original speed for two seconds, and then it seemed to suddenly find that the owner had stopped, and came to a sharp brake, and then fell back in a gray state.

Lu Ze was immediately shocked, I'll take it, this box will still sell cute?