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# [TH] Japanese Firm To Build Space Elevator - Page 7

Quote:
Originally Posted by Rothen

I was trying to do the math, and it all depends where you put it. For example, if you put it anywhere but the equator, you'll find that the elevator will end up "tilted" because of the axial rotation of the Earth. I suppose they all did the math already, and saw how it is plausible, but damn, I don't think we are ready enough technologically to do something like this.

Well in order for it to be tilted you would need gravity to give you a sense of "down". Once you get up about 250km or so gravity starts to lessen quite a bit. so after a couple hours you wouldn't even notice it.

To be honest...I don't think they done any math on this what-so-ever. They are planing a cable to stretch 1/4 of the way to the moon in 38 years when we are struggling to get fiber optic cables ran across dry land yet? (thought the terminal part of it would "only" be 36,000km up)

I think they should plan one to just reach the ISS first and then go from there. Or maybe focus on the solar power part of it. That would be kind of cool to have gigantic solar arrays hanging off of the planet like a bunch of kites. Solar power outside of the atmosphere works a lot better then down on the ground.
Quote:
Originally Posted by Edge Of Pain

It would have our momentum.

You see that is what I am not sure about. The earth's gravity kind of shield's up from the effect in a manner of speaking since gravity is stronger than the force the earth spin is putting on us to go flying off, but this would be far outside of earth's gravity influence. Plus we don't feel the spin of the earth because it is constant. Something on the end of a flexible cable will be able to wobble around...as it moves from side to side there will be cases of accel and decel I think. If the surface is spinning at several hundred km/h something on a cable thousands of km up higher would probably be moving at tens of thousands of km an hour. Even a .1% acceleration or deceleration would be...bad...to anything not securely bolted down.
Edited by Vagrant Storm - 2/29/12 at 11:28am
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I coulda swore I saw a Science channel thing on this and they said that this was impossible til we discovered a better way to mass produce carbon nanotubes. It said the amount needed at current production rates would take like 10,000 years. They also said it would be far to expensive in the hundreds of billions if not trillions of dollars.
I just dont see how it is possible to keep this thing up (thats what she said?)

Wouldnt Wind at a certain point just make this thing buckle and crumble to the grown? Laying Miles of trash across the countryside?

While The Idea is great, and make MUCH more sense than rockets, Structurally it doesnt seem like it will work,
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Quote:
Originally Posted by StormX2

I just dont see how it is possible to keep this thing up (thats what she said?)
Wouldnt Wind at a certain point just make this thing buckle and crumble to the grown? Laying Miles of trash across the countryside?
While The Idea is great, and make MUCH more sense than rockets, Structurally it doesnt seem like it will work,

I wont fall persay since the top part of it will be in low earth orbit from what i under stand it would be like running a cable from the ISS down to earth and anchoring it.

also guys this idea has been around for quite a while we just havent had the manufacturing tech to create cables strong enough to anchor the port in low earth orbit untill now
Edited by racer86 - 2/29/12 at 11:51am
Quote:
Originally Posted by racer86

I wont fall persay since the top part of it will be in low earth orbit from what i under stand it would be like running a cable from the ISS down to earth and anchoring it.
also guys this idea has been around for quite a while we just havent had the manufacturing tech to create cables strong enough to anchor the port in low earth orbit untill now

Heh, the thing is that this is by no means a low earth orbit...and I think some people aren't noticing the numbers here. The ISS is 410km above the ground...they are proposing the station on this cable to be 36,000km above the ground with the "counter weight" hanging out at 96,000km. There is no reason to build this that big and we simply can't do it with the technology we have now or can expect to have in the next 38 years.

A tether to the ISS with an elevator though? I think if we truly wanted to we could have it in place in a couple years. Just need to get some one to pay for it and shooting up a rocket every now and then is cheaper and gets the job done.
Edited by Vagrant Storm - 2/29/12 at 12:11pm
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I couldn't imagine the centrifugal force exerted on the cable. It would have to be made of a material not yet invented.
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Quote:
Originally Posted by Vagrant Storm

Heh, the thing is that this is by no means a low earth orbit...and I think some people aren't noticing the numbers here. The ISS is 410km above the ground...they are proposing the station on this cable to be 36,000km above the ground with the "counter weight" hanging out at 96,000km. There is no reason to build this that big and we simply can't do it with the technology we have now or can expect to have in the next 38 years.
A tether to the ISS with an elevator though? I think if we truly wanted to we could have it in place in a couple years. Just need to get some one to pay for it and shooting up a rocket every now and then is cheaper and gets the job done.

We already have the technology to create such things, However we dont have it advanced enough atm, but it is out there (robots, nano tubes, computers etc)
Edited by prznar1 - 2/29/12 at 12:25pm
Quote:
Originally Posted by Vagrant Storm

Heh, the thing is that this is by no means a low earth orbit...and I think some people aren't noticing the numbers here. The ISS is 410km above the ground...they are proposing the station on this cable to be 36,000km above the ground with the "counter weight" hanging out at 96,000km. There is no reason to build this that big and we simply can't do it with the technology we have now or can expect to have in the next 38 years.
A tether to the ISS with an elevator though? I think if we truly wanted to we could have it in place in a couple years. Just need to get some one to pay for it and shooting up a rocket every now and then is cheaper and gets the job done.

The reason it must be 96,000km above the surface of the Earth is because it must be geosynchronous, any lower and it would have to travel around the Earth rather than remaining stationary with it (relative to the surface below), just like GPS satellites.
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Quote:
Originally Posted by losttsol

I couldn't imagine the centrifugal force exerted on the cable. It would have to be made of a material not yet invented.

Carbon nanotubes mate. They're the crux of the whole thing.
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