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Space elevator construction

aerocontrols

Illuminator
Joined
Oct 21, 2001
Messages
3,444
I understand that scientists are estimating that we are about 5-10 years away from having the carbon nanotube composites necessary to build a space elevator. It seems that all news articles I read act as if building the elevator is a snap. (comparitavely - they all say that the carbon nanotube problem is the only significant problem remaining)

It seems like the building process would be incredibly complicated. How can the ribbon be connected to the ground?

Also, does the center of mass of the elevator structure have to be at Geosynchronous orbit? If so, it seems that part of the process of connecting the tether to the ground would have to be to slowly raise the top of the ribbon (some sort of platform or space station?) as the ribbon itself drops to the ground.


There is a webpage that puts forth some claims of the difficulty here. There's some stuff at the beginning where he talks about inertial frames, which is relevant to the problem at hand. Then he starts talking about the problems he forsees with Space Elevator construction and use.

MattJ
 
in case you havent seen it, there's an article in the lastest issue of Discover Magazine (cover story in fact) on this subject.
 
HarryKeogh said:
in case you havent seen it, there's an article in the lastest issue of Discover Magazine (cover story in fact) on this subject.

Unfortunately, I never learned to read :(

I mean... thanks, I'll check it out. :)

MattJ
 
Amazing the number of things that remain "10 years in the future".

* Cures for cancer and diabetes etc.
* Practical battery powered cars.
* Manned flights to Mars.
* Nuclear fusion power.
* and so on...
 
I'm a chemist and nano tubes for that kind of process are more than 10 years away. Heck they cost ca. $300/ gram.



Maybe in the future but 10 years IHO...no way.


Virgil
 
aerocontrols said:

There is a webpage that puts forth some claims of the difficulty here. There's some stuff at the beginning where he talks about inertial frames, which is relevant to the problem at hand. Then he starts talking about the problems he forsees with Space Elevator construction and use.

MattJ

The article you cited is very interesting, but the picture seems inverted. The elevator shoul be lagging relative to the anchorage point and not leading as appears in the picture.
 
Re: Re: Space elevator construction

SGT said:


The article you cited is very interesting, but the picture seems inverted. The elevator shoul be lagging relative to the anchorage point and not leading as appears in the picture.

I don't think you can tell from the picture if it is lagging or leading since there is no indication of the direction it is moving. Reading left to right makes you think the elevator is leading.
 
ceptimus said:
Amazing the number of things that remain "10 years in the future".

* Cures for cancer and diabetes etc.
* Practical battery powered cars.
* Manned flights to Mars.
* Nuclear fusion power.
* and so on...
Don't forget flying cars.
 
Flying cars 80's style:

general_jump2.jpg
 
All the science here (700k pdf).

Website making ludicrous claims (with concept drawings!).

Incidentally, there are steels which are nearly strong enough now, and considerably cheaper and easier to produce than nanotubes.
 
HarryKeogh said:


in addition to flying it also empowers the driver with immunity from the law once you pass the county line.

Are you kidding? That Chickasaw County sheriff was worse than Roscoe!
 

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