BeanStalk Conduction limits

From: Earl Colby Pottinger (earlcp_at_idirect.com)
Date: 06/17/04 

Date: Thu, 17 Jun 2004 12:36:38 -0500

Christopher James Huff <cjameshuff@earthlink.net> :

> In article <car2dn$k3t$1@panix3.panix.com>,
> "Keith F. Lynch" <kfl@KeithLynch.net> wrote:
>
> > Wouldn't magnetic storms induce strong currents along the whole length
> > of the cable? You may need a few meters of kevlar every kilometer,
> > all the way up.
>
> For what? Assuming a conducting cable, what circuit will the current
> take?
> And remember that although individual carbon nanotubes of some types are
> good conductors, they are not necessarily in good electrical contact.
> The elevator will not be a very good conductor, it's resistance over
> significant distances will be quite high.

This is a major beef to me. Naysayer keep talking about the beanstalk as it
is made out off copper, considering it's lenght and small cross-section it
would have a very high total resistance even if made out of a good conductor.
 However the fibers are imbedded in a non-conducting resin and the max
tensional strenght of a composite material occurs when the fibers are not
touching but rather have 100 percent coverage with resin. This type of
composite will be a poor conductor no matter what the internal fibers are
made of.

Additionally, a question I asked before that was never answered. Someone
claimed that bucky tubes were Ballistic SuperConductor with an internal
resistance of less than 7000 ohms no matter what thier length were, but
no-one stated what happens if two BSCs touch each other in series - does the
total resistance still stay at the same value as a single cable or the sum
values of both cables?

              Earl Colby Pottinger 

-- 
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Relevant Pages

  • BeanStalk Conduction limits
    ... would have a very high total resistance even if made out of a good conductor. ... However the fibers are imbedded in a non-conducting resin and the max ... values of both cables? ...
    (sci.astro)
  • BeanStalk Conduction limits
    ... would have a very high total resistance even if made out of a good conductor. ... However the fibers are imbedded in a non-conducting resin and the max ... values of both cables? ...
    (sci.space.policy)
  • Re: BeanStalk Conduction limits
    ... >> The elevator will not be a very good conductor, ... > tensional strenght of a composite material occurs when the fibers are not ... > total resistance still stay at the same value as a single cable or the sum ... > values of both cables? ...
    (sci.astro)
  • Re: BeanStalk Conduction limits
    ... >> The elevator will not be a very good conductor, ... > tensional strenght of a composite material occurs when the fibers are not ... > total resistance still stay at the same value as a single cable or the sum ... > values of both cables? ...
    (sci.space.policy)
  • Re: BeanStalk Conduction limits
    ... >> The elevator will not be a very good conductor, ... > tensional strenght of a composite material occurs when the fibers are not ... > total resistance still stay at the same value as a single cable or the sum ... > values of both cables? ...
    (sci.materials)