Monday, March 5, 2012

Level " " please (See what I did there? " " = space)

Space Elevators sort of speak have been an idea since long ago. I bet every kid wondered, if we have elevators that go on 99th floor of a building, why not build an elevator all the way to space... but then puberty and growing up and school happened... Shattered dreams!
Or were they, I guess some people never grew up and continued with the idea! (Which is effin' fancy!)


So at the core of it all lies an E&M problem, how much current will be generated with some kind of a wire traveling through a magnetic field. Well, as it happens magnetic and electric fields/forces are pretty real and we can use them to push or pull once we are "high" enough. It is the way to solve asscention and descention from and to space.As described in Scientific American. (I will expand on it later when I visit my parents' home and pull out the magazine)


However a Soviet way is a bit simpler with huge complications: http://kp.ru/daily/23170/25116/?geo=1
In 1960's Yuri N. Artsutanovanov, a soviet physicist, proposed an idea of using an electric elevator and a cable hanging from space. They proposed that an asteroid could be moved towards Earth close enough to follow us as a counterweight. And a station to be built in the Pacific ocean where little seismic activity or Lightning Storms happen. This station could be implanted into Earth to provide stability. Then the problem of a cable strong enough to hold such weight came to become an issue. And the dream seemed to die, but alas, Carbon nano-tubes to the rescue!!! And the dream is now alive once again! Nanotubes are 5 and 50 times stronger than Steel and they weigh almost nothing. (The strength of the sp² carbon-carbon bonds gives carbon nanotubes amazing mechanical properties. The stiffness of a material is measured in terms of its Young's modulus, the rate of change of stress with applied strain. The Young's modulus of the best nanotubes can be as high as 1000 GPa which is approximately 5x higher than steel. The tensile strength, or breaking strain of nanotubes can be up to 63 GPa, around 50x higher than steel. These properties, coupled with the lightness of carbon nanotubes, gives them great potential in applications such as aerospace. "http://www.personal.reading.ac.uk/~scsharip/tubes.htm") To ensure no breaking of nanotube cable, it will be covered with a thin layer of aluminum. So it will look like a sheet of paper with 100000 km in length and 1 m in width.


The proposed elevator will carry up to 13 tons of stuffs into space. making space deliveries cost almost nothing. 100$ for a kg, while current rates are of 1kg for 10000-15000$! Dayumn! We can get any kind of a telescope out in space without making it unfold in space. How awesome would that be!? More Epic than any of the Space Cats!

And now that I really think about it, it'd be a pretty epic suicide to pay for a 75kg body to be delivered into space with a bit of water and other provisions (Just think about that...)! But thanks to some little dillholes, I bet we'd find graffiti on the elevators if it were open to public! 

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