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[TH] Japanese Firm To Build Space Elevator - Page 15

post #141 of 201
You know, I'm willing to bet if they're serious about this, anything anyone in this thread has though of, they have thought of as well. If they have not, they are grossly incompetent and will be stopped before they wrap the Earth with a giant tetherball.
    
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post #142 of 201
Ok, but Van Allen belt is a problem for all kind of space travel right? Rockets and space shuttles also have to counter this problem, and i think they did. None of the astronauts is glowing in dark so same solution can be moved to this project, right?
How about nano tubes? we know nearly nothing about them, they are still under heavy early research, and they have capabilities to be that kind of material what is needed for building something like this.
post #143 of 201
Quote:
Originally Posted by prznar1 View Post

Ok, but Van Allen belt is a problem for all kind of space travel right? Rockets and space shuttles also have to counter this problem, and i think they did. None of the astronauts is glowing in dark so same solution can be moved to this project, right?
How about nano tubes? we know nearly nothing about them, they are still under heavy early research, and they have capabilities to be that kind of material what is needed for building something like this.

The biggest issue with nanotubes is that in early tests, it was proven that they can only be created in small strands and are toxic and can have nearly lethal effects if ingested or inhaled. Those were the issues. At this time, though, they may have found a way to overcome those obstacles.

Once you get past those potential setbacks, it really is a miracle particle. The strength of nanotubes is just unreal.
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post #144 of 201
Quote:
Originally Posted by prznar1 View Post

Ok, but Van Allen belt is a problem for all kind of space travel right? Rockets and space shuttles also have to counter this problem, and i think they did. None of the astronauts is glowing in dark so same solution can be moved to this project, right?

Well rockets are in the Van Allen belts for seconds or minutes. Skyhook cars would be in the Van Allen belts for hours or days. There is a very easy way to protect from radiation: just shield the whole capsule with lead, or water. Easy. Only problem is that adds a ton (literally!) of mass, which means the tether has to support more weight which makes it more difficult to build.
post #145 of 201
Quote:
Originally Posted by Mad Pistol View Post

The biggest issue with nanotubes is that in early tests, it was proven that they can only be created in small strands and are toxic and can have nearly lethal effects if ingested or inhaled. Those were the issues. At this time, though, they may have found a way to overcome those obstacles.
Once you get past those potential setbacks, it really is a miracle particle. The strength of nanotubes is just unreal.

They're working on production methods, and already they can make tubes well over a meter long. They haven't managed 96,000km yet though. wink.gif As for toxicity that's only really with very small particles of nanotube that, on the nanometer scale, could be absorbed into cells and cause cell death; or micro scale nanotubes which could be inhaled into the lungs and cause asbestos-like effects. But when you get into macroscopic scales, in centimeters and meters and kilometers, there's really no health threat.
post #146 of 201
Quote:
Originally Posted by Phaedrus2129 View Post

Well rockets are in the Van Allen belts for seconds or minutes. Skyhook cars would be in the Van Allen belts for hours or days. There is a very easy way to protect from radiation: just shield the whole capsule with lead, or water. Easy. Only problem is that adds a ton (literally!) of mass, which means the tether has to support more weight which makes it more difficult to build.

ok, but this 200km/h lifting speed is just a concept. i guess that it will be going way faster, and it will be accelerating easly (further away from earth, you have lower gravity to deal with and less friction due to less dense atmosphere).
post #147 of 201
Gundam 00 anyone?
post #148 of 201
"Beam me up, Scotty".... "Ok, see you next week"
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post #149 of 201
So many people that watch Gundam here. biggrin.gif
     
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post #150 of 201
You guys are getting overly excited
those scientist have calculated all the maths decades ago on the weight and distance for the counterweight to be at.

The first elevator is not meant for live cargo (humans) as the lift platform needed to be lightweight and probably unpressurized + unshielded.

Only when building materials can be hauled up to orbit on the cheap can hotels and tourism flourish.
The current $200k ticket tourist rides on sub-orbital spacecraft barely have enough fuel to fly above 100km much less dock with an orbital station 400km up.
Edited by krabs - 2/29/12 at 11:10pm
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