Japan will test the space elevator model

Japan launched a heavy rocket H-2B with an unmanned spacecraft Kounotori 7 (Aist-7), which will deliver cargo and experimental equipment to the International Space Station. RIA News.

Among the equipment are two mini-satellites STARS-Me. The cubic devices with the 10 face are connected to each other with a 10-meter steel cable, along which a small capsule with a motor and a camera moves. This design will be released into the open space, where the model of the space elevator will be tested.

According to Masahiro Nomi, a professor at the University of Shizuoka, no one has yet tested how it works - the idea of ​​a space elevator still existed only as an idea. The task of the experiment is to find out what will happen in space if a cable is pulled between the two satellites and the device is started up.

The development of the project took the company Obayashi Corporation. It is assumed that the elevator will be able to deliver not only cargo into orbit, but also space station blocks, which will then be sent to the Moon and Mars.

The idea is as follows. First, a satellite is output to a low orbit (about 300 km), on the basis of which the creation of a spacecraft will begin. An already completed ship will rise into a geostationary orbit and will rotate at the same speed as the Earth, that is, it will always be above the same point. Reaching a height of about 36 thousand. Km, he will begin to produce a cable of nanomaterials, and he will continue to gain height. After the ship reaches a height of 96 thousand km, its cable reaches the Earth.

Then, using the shuttle, work will begin to strengthen the cable, which will eventually have to withstand the hundred-ton lift. And only after that will the construction of stations in geostationary orbit and at other heights begin.

The current experiment should reveal the possibility of implementing what is the principle of the space elevator, the movement of cargo along a cable stretched between two satellites, Nomi explained.

Sketch of a set of two small satellites STARS-Me.

At first, the two satellites will function as a single unit, but then they will independently disconnect and stretch the cable between them. When the “elevator” is ready, the elevator will receive a command from the Earth and will start moving. It takes about 2,5 months to deploy the system (including checking all the hardware). The test itself will last no more than a few minutes, the professor said.

Comments

[Alex_Rarog]

If they succeed, then everyone will remain in a well-known place ....
And we and Ilon and the rest. But it will be a breakthrough!

[sir_obs]

If my grandmother had, she would be a grandfather. This idea is a million years old, as a child he read in fantastic ponans. So far nothing has come of this, there are no materials capable of withstanding such a load.

[Alex_Rarog]

I also read when I went to school. But then there were not those materials that are now. And why not ?!

[sir_obs]

Then it was not and now it is not. Otherwise, they would have done so long ago. The Americans have already been promoting this topic, and what if they all came up with it, although the same Tsiolkovsky came up with it at the end of the 19th century.

[Shurik70]

In orbit, hundreds of millions of debris from space debris, from microscopic to entire satellites. And every year humanity adds this garbage.
Space satellites almost do not encounter this debris, because:
a) the debris moves in different orbits, and only a small percentage of the debris crosses a specific satellite orbit.
b) the satellite itself is small (from several tens of cm to several tens of meters)
c) most of the debris moves in the same direction and at the same speed as the satellite (moving synchronously) (like cars on the highway), and therefore do not intersect.

Space elevator:
a) crosses ALL orbits of space debris
b) the elevator itself is a macroscopic object with a length of 60 - 80 thousand km
c) only debris in a geostationary orbit will move simultaneously with the elevator.

Conclusion - Absolutely all debris and all satellites in orbit (with the exception of geostationary ones) will sooner or later intersect with the space elevator. And what will happen to a synthetic cable stretched with a force of many tons, if it is even slightly cut? And what will happen to the satellite (and the same ISS) crashed into a cable?

The space elevator is a beautiful dream. But now unviable, idle at best for several days. To realize this dream you need:
a) legislatively introduce an international law prohibiting the installation of satellites closer than 85 thousand km
b) create technologies through which space can be cleaned of existing debris, and apply these technologies (and this cleaning will stretch for many decades, if not a century)

[Kerensky]

And what will happen to a synthetic cable stretched with a force of many tons, if it is even slightly cut?

Nothing. The effort on the cable will be several grams, in extreme cases, a dozen and a half, at the initial stage. Well, do not be lazy! Read at least the same Makovetsky, and do not misinterpret the nonsense of journalists.

[Shurik70]

The force in grams will be for the "rope" the size of a cobweb. Any cosmic grain of sand will cut it.
A commercial elevator to lift the load will be pulled with an effort not less than this load. Elementary mechanics. It is impossible to raise a ton by the cable if the cable is not pulled with the force of that ton.

[Kerensky]

The force in grams will be for the "rope" the size of a cobweb.

Alexander! And why? You can even pull the anchor chain - the effort will be a few grams.

[Shurik70]

An elevator is not a satellite; weightlessness is there only at a geostationary height (this is 36,7 thousand km). On the rest of the plot, gravity works (gradually decreases with climb, after the geostatsinoinara begins to work in the opposite direction)
There are no anchor chains a kilometer long precisely for the reason that they will break under their own weight.

[Kerensky]

There are no anchor chains a kilometer long precisely for the reason that they will break under their own weight.

Alexander! It is for this reason that I cited the chain as an example, for it consists of links.

[Kerensky]

It is impossible to raise a ton by the cable if the cable is not pulled with the force of that ton.

And you try. Here is the elevator. His cabin is balanced by a counterweight. The motor only lifts the load of the elevator, well, let's say one person. And if the cab and the counterweight are not constant weight?

[Shurik70]

A counterbalance equalizes the cab, and the motor pulls the person. Savings in kilowatts.
But the cable itself, which is attached to the cab, holds not only a person, but also the cab. And pulled accordingly.

[Mordvin 3]

Quote: Kerensky

His cabin is balanced by a counterweight.

Where do we get the counterweight in space? Maybe a stupid question, but I don’t understand. Well, do not throw it to the moon.

[Shurik70]

The simplest and cheapest space elevator scheme is a cable fixed (anchored) at the equator, the other end at an altitude of 75-100 thousand km, there is a massive load (counterweight). A little weight on a rope spun everything in childhood, so everyone knows what centrifugal force is. At the speed of rotation of the Earth, in order for the centrifugal force to balance with the force of gravity (weightlessness has come), it is necessary to rise to a height of 36,7 thousand km (geostationary orbit). Well, the higher the centrifugal force will be more gravity, and the counterweight will pull the cable.
Another problem is how to pull such a cable (it is this moment that the Japanese will practice) To do this, bring the coil with a cable to the geostationary station, attach the loads to both ends and, unwinding the coil, gradually lower one end to the Earth and raise the other, while maintaining equilibrium between them (otherwise the satellite will carry it off the geostationary station and twist the cable like a rotating dumbbell)
A technical problem is the material of the cables. It should be hundreds of times stronger than a steel cable with a mass equal to or less than steel. So far, only one such material has been found - fullerene tubes woven into a cable. But even a meter of such a string is pipets as expensive, and here you need 100 thousand km, but not a string, but a cable.
And, as I already said, such a cable will cross the orbits of absolutely all space debris and satellites, so that someone will crash into it very quickly.

[Mordvin 3]

Quote: Alex_Rarog

I also read when I went to school. But then there were not those materials that are now. And why not ?!

The plane will fly, and the elevator will caput. And there’s such a thing as Earth’s rotation.

[Alex_Rarog]

Well, 20 years ago, the same comrades on mobile phones shouted yes who needs it and this is not possible. And now, in my phone, the iron is more powerful than half of the computers standing in the window of the same CSN. So what? And then there simply were no materials ... Everything moves, everything changes ... only human stupidity is eternal ....

[Praetorian4]

Complete nonsense. Just complete! This is not so close.
And most importantly, your comment confirms your statement.

[poquello]

Quote: sir_obs

If my grandmother had, she would be a grandfather. This idea is a million years old, as a child he read in fantastic ponans.

Arthur Clarke "Fountains of Paradise"

[Svarog]

Quote: sir_obs

If my grandmother had, she would be a grandfather. This idea is a million years old, as a child he read in fantastic ponans. So far nothing has come of this, there are no materials capable of withstanding such a load.

What do you think, is a Japanese professor a swindler? And just decided to spend someone’s money? Having previously calculated nothing? And then, why do you think this is? The Japanese are not Italians, they have a different mentality .. I think that if they do, then there is a chance that they will succeed .. And in any case, well done .. They will not succeed in understanding why and in the end they will do it anyway ..

[Mestny]

In how.
They’ll spend the money, but they won’t do it - well done anyway. Because they will understand why.
It remains with respect to ours so to learn to speak.

[mavrus]

And how much will it cost? At least one nanocable 36 thousand km long.? And how much will it weigh (or rather, what is its mass)? (If even 1 meter is only 1 gram, then this is already 36 tons.) What kind of payload will it withstand? I do not think that this is real in the coming years, but the experiment is good.

[poquello]

Quote: mavrus

And how much will it cost? At least one nanocable 36 thousand km long.? And how much will it weigh (or rather, what is its mass)? (If even 1 meter is only 1 gram, then this is already 36 tons.) What kind of payload will it withstand? I do not think that this is real in the coming years, but the experiment is good.

and even the movement of the air mass will create pressure and tension changes strength, h.z. but of course you need to look

[Corn]

It will not be built in one day, while there is only a theoretical study.

[datur]

Well, yes, the Asians decided that White could not !!!

[Awaz]

hmm. THERE is nothing so supernatural. In principle, this is even meaningless if you think about it. The elevator to space will work according to completely different rules. And this is just a small experiment, there is no breakthrough in it, everything is banal simple, a load will be dragged between two objects by means of a cable .. All this is about anything.

[Vladimir Postnikov]

Everything is simple, if you take a pencil and a piece of paper. Overcoming the force of gravity will occur only in a geostationary orbit (more than 35000 km above sea level). Until the rise into this orbit, the gravitational force will prevail. The first thousand kilometers (!) Will have to creep under the influence of the same gravitational force, and the conditional inertia force (it is also conditional centrifugal) will be invisible crumbs.

The idea is as follows. First, a satellite is launched into a low orbit (about 300 km), on the basis of which the creation of a spacecraft will begin.

This idea is generally nonsense. Not only will it give practically nothing, but then the same "satellite" will have to be caught (by the "lift"). How does the author of the article imagine this? The angular velocity of the "space elevator" is constant and much less than a satellite in low orbit.
Count it. It will take no more than 10 minutes. Mechanical engineers are obliged to solve the problem.
The Japanese experiment is PR, and nothing more. Rogozin's example is contagious. PR rules the world and thrives. Common sense picks in the trash.

[Vladimir Postnikov]

In a fit of indignation, I hurried a bit, deciding that the spacecraft would be created in low orbit. This is a consequence of the fact that the author of the article called the ship the future space elevator station. Station and ship are slightly different things.
As for the Japanese experiment. The principle of a space elevator will not work in this experiment. In order to make a mass move from a satellite from a lower orbit to a satellite with a higher orbit (which already slightly warps at the thought of the same angular velocity), force must be applied to this mass of the transported cargo. There will be no movement without this. In the idea of ​​a space elevator, this force is born in the interaction of cargo and cable. It is the cable of the space elevator that will steal (transmit) the moment of the Earth's momentum by acting on the load. Who will share the momentum in the case of two satellites?

[Mestny]

And is Rogozin to blame? Confused the hardworking Japanese?
Well what is it.

[Vladimir Postnikov]

Quote: Mestny

And is Rogozin to blame? Confused the hardworking Japanese?

Do you think that Rogozin came up with PR? You're wrong. This is not his invention. But he mastered it at a high level. The Japanese have a lot to learn from him in this area.
There is only one wonderful expression: "words do not do business".

[SHURUM -BURUM]

This is the easiest part of the task, in space, in zero gravity mode. And we can say in advance - everything will pass without problems. But the question is, what will happen to the carrier of the upper part of the cable when the lower end of the cable is inhibited by the atmosphere? It is much more important to consider the reality of this project with an analysis of the expected problems. But there will be no problems if you nail the upper end of the cable to the moon. Please take into account the priority over the Japanese in this proposal

[newcomer]

damn, I don’t even know what to think. The idea itself is genius simple. how about implementation? so many physical principles will interfere with the “descent and pulling of the cable”.

[Gray brother]

Quote: newbie

will interfere with “pulling and pulling the cable”.

It is necessary to fasten. For good.

[newcomer]

you need to go to japan. urgently.

[Gray brother]

Quote: newbie

0
you need to go to japan. urgently.

I saw their apartments, I do not want to go there.

[sir_obs]

She is brilliant in that it was not the Japanese who invented it. For the first time, such an idea was expressed by Konstantin Tsiolkovsky in 1895, a detailed development of the idea was obtained in the works of Yuri Artsutanov.

Then the Americans tried to pass her off as theirs, now the Japanese are here. Only here is the problem with the cable, which at least maintains its own full-time. Everything else is not so difficult against the background of the main problem

[Serge Gorely]

The good news is that Russia has refused a joint lunar program with the United States

[Corn]

After the story of the hole on the ISS, it’s another question who from / from whose program it responded / expelled.
And why is this good, because now there will be no domestic civilian cosmnautics at all? The science module will say hello.

[sir_obs]

The Americans were drilling the hole just to tie the cable along it to the station and from the antsii to climb.

[SHURUM -BURUM]

And I have an opinion that someone embodied an unusual fantastic dream to see open space not through the glass of the porthole, but directly with his own eye, using the hole and, while remaining alive. From this point of view, the author, in all seriousness, can be included in the Guinness Book of Records. Incomprehensibly, - The first person in the World saw an open Cosmos without a spacesuit! As a developer, I will say that a very elegant decision was made for this purpose.

[Pontiffsulyvahn]

There has never been any "joint" program. The lunar station is a purely American project, all the others act only as partners one level below.

[Blackmokona]

Rosskosmos has already denied

[slipped]

This is a lie to the media and Roscosmos has already denied this information.

[Setrac]

Are there materials that can stand IT?

[Gray brother]

Quote: Setrac

Are there materials that can stand IT?

"It" is yes, but the orbital elevator is not. There, one cable will weigh overdokhren, at least it must withstand its own weight - this will already be a feat. In addition, an object of the corresponding mass must be in orbit - an asteroid for example

[SRC P-15]

Quote: Gray Brother

In addition, an object of the corresponding mass - an asteroid for example, should be in orbit

I think the object will be held in orbit due to centrifugal force. Example: unwinding a ball on a rope. Only one point confuses: in zero gravity the laws of physics do not always work.

[Ehanatone]

No BaAaAsche does not work, and satellites rain down on Earth

[Gray brother]

Quote: СРЦ П-15

I think the object will be held in orbit due to centrifugal force.

At the geostationary site, it should hang above the equator, i.e. its speed must coincide with the speed of rotation of the Earth, otherwise it will not work.

[kpd]

To compensate for the weight of the cable, it is much higher than the geostationary, approximately 80 ... 120 thousand kilometers.

[Gray brother]

Quote: kpd

To compensate for the weight of the cable, it is much higher than the geostationary,

They write about 36000 - this is the geostationary. It is not necessary to pull this far, you can compensate for the mass of the object.
And still do not forget to build a tower for 20 kilometers, at least so that the cable from atmospheric effects inside it is closed, and in space meteorites and any rubbish will be hollowed on it.

[YarSer88]

Having reached an altitude of about 36 thousand km, he will begin to produce a cable from nanomaterials, and he himself will continue to gain altitude. After the ship reaches a height of 96 thousand kmHis cable will reach Earth.

Taki 96 thousand km

[SRC P-15]

Quote: Gray Brother

those. its speed must coincide with the speed of rotation of the Earth,

At the geostationary, the satellite’s speed is many times greater than the Earth’s rotation speed.

[Gray brother]

[quote = СРЦ П-15]
Geostationary orbit (GSO) - a circular orbit located above the Earth's equator (0 ° latitude), being on which, an artificial satellite revolves around the planet with an angular velocity equal to the angular velocity of the Earth's rotation around the axis. In the horizontal coordinate system, the direction to the satellite does not change either in azimuth or in height above the horizon - the satellite, as it were, hangs motionless in the sky.
wikipedia.org

[SRC P-15]

Quote: Gray Brother

An artificial satellite orbits a planet with an angular velocity equal to the angular velocity of the Earth's rotation around its axis.

That's it about the angular velocity that I wanted to hear from you! And in your comment:

Quote: Gray Brother

those. its speed should coincide with the speed of rotation of the Earth

[Gray brother]

Quote: СРЦ П-15

And in your comment:

I studied at the vocational school for fence construction - I can.

[YarSer88]

Just the angular velocity will coincide, but the linear, as you say, is much higher. Therefore, it is called - GEOSTATIONARY orbit, that is - the object stands still relative to the earth.

[Horse, people and soul]

What is the speed? Linear and angular velocities are two different things.

[AUL]

Quote: СРЦ П-15

Only one point confuses: in zero gravity the laws of physics do not always work.

Actually, the laws of physics work always and everywhere - even in zero gravity, even in a foreign tour. You just need to know them!

At the geostationary, the satellite’s speed is many times greater than the Earth’s rotation speed.

Estimate, but the angular speeds of rotation will be the same! Here are the miracles!

[Setrac]

Quote: СРЦ П-15

Only one point confuses: in zero gravity the laws of physics do not always work.

How's that?

Quote: СРЦ П-15

Example: unwinding a ball on a rope.

Yes, even buckets of water, the object will simply "fall" in the other direction.

[Simargl]

Quote: СРЦ П-15

Only one point confuses: in zero gravity the laws of physics do not always work.

What is it like?!
Didn’t finish my studies or ...

[Awaz]

even the ISS is in the Earth’s gravitational field. There are the same laws as on Earth, only g is slightly lower, but not as critical as everyone thinks. Weightlessness on the ISS is provided only by the speed of the station itself, just like you, for example, at a good speed, suddenly overcome the top of the hill, getting as once the very particle of zero gravity that astronauts constantly experience

[Gray brother]

I wonder how they are going to pull the cable, he will "play" when the satellites scatter their full length, the hummock will pull them and they will slowly fly back to each other .. It would be better to place a folding cable on the frame - spread it and that's it. Strange people.

[Vadim237]

Using engines, tensile traction.

[Gray brother]

Quote: Vadim237

Using engines, tensile traction.

They like to create unnecessary difficulties for themselves.

[Dashout]

Wow! Well done Japanese !!!

[Horse, people and soul]

With a steel cable, what are they doing well? Saw grants?

[Setrac]

Quote: Dashout

Wow! Well done Japanese !!!

When roskosmos experienced a solar sail - you shouted everything sucks.

[Svarog]

Quote: Dashout

Wow! Well done Japanese !!!

I also think that the Japanese are great, why it’s not clear why it should be minus ..

[Setrac]

Quote: Svarog

I also think that the Japanese are great, why it’s not clear why it should be minus ..

They are not good fellows. Now, if they built this space elevator, they would be great. And so there is no reason for enthusiasm, unless of course you are not an ardent Japanese-philo.

[Mordvin 3]

Quote: Dashout

Well done Japanese !!!

Well, well, let them ride these elevators themselves. I would not want to be stuck on this.

[slipped]

In 2007, on the Russian scientific and technological satellite "Foton-M3", an experiment was carried out to lower the ESA "Fotino" cargo from orbit with the help of the European cable system. The cable had to be unwound for 30 km, after which the cargo would have to detach and land by parachute. Unfortunately, the cable deployment was interrupted at 8,5 km. Although this was a record, the longest cable previously reached 4,5 km, in general the experiment ended unsuccessfully. The cable system could not withstand such loads. So that the Japanese are far at the beginning of this path.

[sigdoc]

In my opinion, if there is zero gravity in space, then there is no centrifugal force, so the cable is from the earth to the cosmos. the station is a canoe, for those who have nowhere to go.

[nPuBaTuP]

Because you do not work in the space industry ....

[Vol4ara]

How is weightlessness and centrifugal force related, should it not be there with a fig? : DDDD

[Horse, people and soul]

What is the point in this experiment if there is no material for the cable so far that can support its weight with a length of 200 km?

[Mordvin 3]

But the red nanochubais will take, and will do, what do you say?

[Horse, people and soul]

First let him do it. Then we listen to what I say.

[Mordvin 3]

Quote: Horse, lyudovѣd and soulѣlyub

Then we listen to what I say.

Well, acre mate, you are unlikely to hear anything.

[Conductor]

He has already made a nanoplate for schoolchildren, invisible in the Russian Federation.

[Mordvin 3]

Quote: Conductor

He has already made a nanoplate for schoolchildren, invisible in the Russian Federation.

And this, the most ... nanolight?

[Mestny]

Is it possible that he did the Japanese too?
Well then, everything is clear.
And it was not clear how such a smart country was, and suddenly such nonsense was invented.

[Mordvin 3]

Quote: Mestny

and suddenly they invented such nonsense.

Well, keep the bullshit.

[Non liberoid Russian]

in order to create such a system, it will be necessary to spend money and spend money ... it will put a station of sufficient volume into geosynchronous orbit, create a cable capable of supporting its own weight and carry the load lifted ... create engines that would prevent the station from leaving orbit under weight cable ... although let them experiment, if only war

[Conductor]

We will follow with interest. Japa is a stubborn people.

[Conductor]

Um, and atmospheric phenomena on this design will not have an impact.?

[Gray brother]

Quote: Conductor

Um, and atmospheric phenomena on this design will not have an impact.?

Of course they will.

[minus]

But haven't they written about this scam about a week ago? Not? There seem to be comments with more detailed explanations of why this was not possible ...

[Curious]

Japanese firm Obayashi Corp, a study plans to complete the project in 2050. The company plans to build six elevators, each of which is 18 m long, 7,2 m long in diameter, which can accommodate 30 people each and travel at a speed of 200 km per hour. Lifts will run between the space station and the platform in the Pacific.

By the way, the Chinese are going to complete a similar project by 2045.
There is practically no information on the resource on this topic, but materials are regularly published on how much, when, and where Poroshenko farted.

[Hole puncher]

Quote: Curious

By the way, the Chinese are going to complete a similar project by 2045.

More than doubtful, the Japanese are ahead of the rest in creating carbon fiber, they are doing the most durable, the Chinese are far from them, and without it this topic is impossible. Perhaps the Chinese will be able to, but only after the Japanese have done it, while this will be another example of copying. For example, now they are trying to copy the Falcon9 Mask.

[Curious]

In addition to carbon nanotubes, nanotubes made of boron nitride and diamond are considered as material for the cable. Carbon has its problems. Such a large cable length also increases the number of internal defects characteristic of this material, which, in turn, can reduce the strength characteristics by about 70%.
So not all the trump cards of the Japanese.
.

[Tarasios]

And why is it necessary to make fixed elevators (relative to the Earth)? You can go further.
We are building a railroad on Earth that encircles the entire Earth. We put on the piece of iron a train of several cars. We launch-where-you need a satellite. We take a long cable (of course - nano, where without it). We catch the cable at one end for the satellite, at the other for the first train car. And voila: the elevator is working, the train is rolling around the earth for free. But if the elevator reach the moon itself, then the satellite does not need to be launched. Solid profit)))

[yanturjin]

Bravo! Ingenious! I think that at the cost of such a round-the-world railway, it will surpass a hundred lunar programs with dozens of bases on Mars. But I like your train of thought. Not standard))

[Vol4ara]

What if passengers want to get off? : D Or is it like an option for a prison for life in prison? And if something goes wrong? We already sat Tesla in space, there is no paravoz

[Gray brother]

Quote: Vol4ara

0
What if passengers want to get off?

Wagons from the tail will have to be uncoupled

[Mordvin 3]

Quote: Gray Brother

Wagons from the tail will have to be uncoupled

There is such a rag, the parachute is called.

[The Siberian barber]

Quote: Tarasios

And why is it necessary to make fixed elevators (relative to the Earth)? You can go further.
We are building a railroad on Earth that encircles the entire Earth. We put on the piece of iron a train of several cars. We launch-where-you need a satellite. We take a long cable (of course - nano, where without it). We catch the cable at one end for the satellite, at the other for the first train car. And voila: the elevator is working, the train is rolling around the earth for free. But if the elevator reach the moon itself, then the satellite does not need to be launched. Solid profit)))

Do not forget to put the cash register))

[FC_ZP]

And it’s also possible on this round-the-world railway (by the way: the seas and oceans will have to be beaten somehow), you can put generators on and get more free electricity))))

[Grif]

I didn’t understand something: will the satellite enter geostationary orbit and then begin to rise? so he will not be able to hover over one point due to the descent from the g-orbit

[FC_ZP]

Honored the comments. We began to calculate angular velocities, effort on a cable, etc.

Elevator operation principle: the cabin is balanced by a counterweight. The motor lifts only what is in the cab.
Question 1: how do you imagine the counterweight for this elevator? Earth?)
Question 2: No one was embarrassed that Earth's gravity will pull down that part of the "structure" that is below the geostationary?
Actually there are no more questions. More precisely, there are, but they are meaningless until the answers to the first two are found.

[Petrix]

Quote: FC_ZP

the cabin is balanced by a counterweight. The motor lifts only what is in the cab.

What counterweight? The weight of the elevator pulls it down, WHAT can pull it up? The counterweight is only centrifugal force in this case. In addition, why is it that the cabin does not apply to the weight of the elevator?

Actually about the meaninglessness of the space elevator: When the elevator starts to "rise" it will simply pull the space station down, remaining in place. To prevent this from happening, the station must turn on the engines, and this is the same as removing the same cargo with a conventional rocket (the same impulse, the same amount of fuel to burn)

[YarSer88]

A section of the cable above the GSO will be pulled upward, but the article says that the height of the satellite with the "upper end" of the cable will be 96 km, which is 000 times higher than the GSO. If the GSO is the point of equilibrium between centrifugal force and gravity, then everything that is higher than it, according to logic, should be pulled from the Earth with a force proportional to the distance. And given that the mass of the elevator with the load is negligible in relation to the mass of the cable, then if the satellite's orbit needs to be corrected, it will be quite insignificant. Plus, when the launch vehicle enters orbit, it is required to compensate for the air resistance at near-space speeds by thrust, while the lift can rise to LEO at the speed of an ordinary car, then the air resistance will be minimal.

[Vladimir Postnikov]

Quote: Petrix

When the elevator starts to "go up" it will simply pull the space station down, staying in place. To prevent this from happening, the station must turn on the engines,

Here you may be objected that the "counterweight" will constantly create some kind of tensile force (let's call it a tension force). If the force of attraction to the Earth of the lifted load is less than this force, then the station will not leave orbit. But in this topic there are so many empty desires, not supported by anything, that I do not understand why this topic is already regularly discussed on this resource. This is a topic for the audience "Young Technician" and "Technique of Youth". Here, such articles are interesting only because the competence of the audience and the authors of the articles is manifested.
But the Japanese, this experiment will not work. I mentioned this above. But in terms of PR, everything is in order here. The Japanese exponentially promoted on an empty idea.

[Tarasios]

Quote: Siberian barber

Quote: Tarasios

And why is it necessary to make fixed elevators (relative to the Earth)? You can go further.
We are building a railroad on Earth that encircles the entire Earth. We put on the piece of iron a train of several cars. We launch-where-you need a satellite. We take a long cable (of course - nano, where without it). We catch the cable at one end for the satellite, at the other for the first train car. And voila: the elevator is working, the train is rolling around the earth for free. But if the elevator reach the moon itself, then the satellite does not need to be launched. Solid profit)))

Do not forget to put the cash register))

Oh, that's not necessary about the cash register. Just the task is to "tie" this very cash register to the accounting store program. What a pleasure ...

[Old26]

Quote: Mestny

They’ll spend the money, but they won’t do it - well done anyway. Because they will understand why.

Sometimes a negative result is also a result. It becomes clear where theory begins to diverge from practice.
And sometimes what was fiction 50 years ago now acquires the features of reality. Take, for example, the old science fiction novels of the 40-50s. Especially the illustrations for them. Rockets landing vertically on their own engines. In the 60s it was a pipe dream, a fantasy; in the 70s, timid projects about vertically landing, if not rockets, then at least ships, appeared. Now the same "adventurer" Musk is planting steps vertically on the engines. Over time, they will create a rocket that cannot be divided into stages. There is development, evolutionary, but nevertheless it goes. The development of metallurgy and related industries will make it possible to create a cable from nano materials. The garbage problem is also solvable. In addition, rubbish is still not a solid, single wall of debris, fastened together. A piece of debris can be hundreds or even thousands of meters away from another. And the probability of hitting the cable becomes generally vanishingly small. And technically, in such orbits, you can protect the same cable from debris. If you do nothing, then it will not become clear whether this idea is stillborn or not. Need to try. Perhaps such an elevator will not be realizable to the surface of the earth, but between orbits - no problem ... In short, let them try. Only the one who does nothing is not wrong

And comrade is right Alex_Rarog... 2-3 decades ago, many things that are now commonplace for us were considered either impossible or unrealizable. In the mid-80s, in our design bureau, the first personal computers were received into departments. EMNIP was "Electronics-60". The fact that it was attached to a table welded from channels and the table could be dragged and lifted to the floor by 4-6 people - that's half the battle. The memory in general was (operational) almost 2-4 kilobytes, and the screw was 200-300 kilobytes. And in comparison with the "big" machines of the CM and EC series, it was a miracle. Each department has its own personal computer, which was much easier to teach than to work on large machines.
And 40 years ago they didn’t even hear about mobiles. 30 years were perceived as a curiosity, not understanding why she was, when there are street pay phones, and an urgent message could be reset to a pager. And now, does anyone imagine life without a phone in their pocket ???? And the comrade is right. Now the phone sometimes has higher memory characteristics than home computers.