Re: Irish Electricity


"Si" <W@xxxxxxxxxxxx> wrote in message news:43ccf87e$1@xxxxxxxxxxxxxxxxx
>
> "Duck" <none@xxxxxxxx> wrote:
> >
> >"Si" <Fl@xxxxxxxxxxx> wrote in message news:43cbb0fb$1@xxxxxxxxxxxxxxxxx
> >>
> >> "Duck" <none@xxxxxxxx> wrote:
> >> >
> >> >*There is the fantastic option, apart from theorising about the
> >> >satellite belt Clarke also thought of the space elevator, basically a
> >> >tunnel to space held up by centrifugal force, then he was aware that
> >> >no material then could support it but apparently there is now.
> >> >
> >>
> >>
> >> Aw bless you are talking about ickle space tethers.
> >
> >*I wasn't, Clarke's was a space elevator. I wasn't aware of space tehters
> >until now.
> >
> >
>
>
>
> Yes the elevators run up and down the tethers. The present designs are
little
> more than rockets on rails. So why bother with the rails?
>
>
*Different system the ones I was looking at where solar powered travelling
up to 120 mph.



> >> Interesting to see how these thethers would react to an airliner.
> >>
> >*It's thinner than paper if it broke half would fly up to space and the
> >other half fall like heavy ticker tape.
> >
> >
>
>
> I was thinking more of the economic impact. Putting those things up is
going
> to be a challenge in itself. The dollar value of such an installation
would
> not be insignificant. Consider that your average launch cost, depending on
> vehicle is anywhere from 50 million to 450 million.
>
>
*10 billion all in which considering how much has went into the space
shuttle and even defence it seems minimal.

Two rockets are needed, one for the satellite the other for the first
tether. The other tethers are carried up by elevator to form a set so if one
breaks others can easily take the strain.



>
> The beauty of the moon is that there is a range of minable near earth
asteroids
> that are more likely to contain useful material that the earth is. One can
> get to them easier from the moon or the lagrangian points which is another
> option. The energy to get from the moon to them would be trifling compared
> to getting from the earth to the moon. Or riding up your escalator. The
engine
> the lofted the boys off the moon is in the foyer of my office. It is
somewhat
> underwhelming.
>
>
*Sure but in the 60's it was an achievement, the different fuels, different
systems of pressurising the fuel and only enough fuel to get it right once.
No rehearsals from the moon.

Like the atom bomb they knew there was a chance that the bomb might set off
a chain reaction that could've set the whole atmosphere up, the odds were
miniscule but they still took the chance.



> >>
> >*I just read up on the tether and it seems both economically and
physically
> >possible, can't understand your pessimissim. What is you work at anyway?
> >
>
> Fair cop gov. Banged to rights... I make rockets.

*Ah competition then.



> In fairness I am not that pessimistic about it. I think it is one option
> for future space access. It is a long way off though. I also don't like
the
> fixed nature of it. There is an old joke that electrical engineers make
money,
> mechanical engineers make weapons and civil engineers make targets. That
> would be one big target and pretty easy to hit too. Plus there would be
the
> political ramifications of 'owning' one of those things. There are better
> options that rely on more traditional approaches. Rocket based combined
> cycle engines, which if you believe the conspiracy theorist, are already
> in operation with some black programs.
>
> The only real way to get the access price down is let the privateers at it
> and get the governments out of it. That won't happen any time soon. There
> needs to be a paradigm shift somewhere.
>
>
*They reckon ten years for the whole system and they reckon the materials
will be commercially available within five.

Since this seems to be in your general field what do you make of this
conspiracy theory.

Firstly it's interesting that the plane hammered through all the floors and
seemed intact but also that it did disintegrate, which the theorists say
can't happen.

But far interesting, amazing in fact watch the right of the first hit for
the UFO and I'm not suggesting aliens here. Some have discounted it as a
blurfo, a helicopter etc. Not a chance.

http://www.attackonamerica.net/f-15atwtc.mpg


This is it at proper speed, it's definitely not a helicopter but at that
trajectory it looks to be heading to ground.

http://www.attackonamerica.net/f-15.mpg

And a still in which you can just about make out a set of fins.

http://tinypic.com/kdv0ox.gif


I had seen another angle of this but couldn't find it today but seen from
behind all that can be seen is a paper thin black slither and just for a
split second, something's up. What's your view?


Duck


.

Relevant Pages

  • Re: Irish Electricity
    ... Clarke's was a space elevator. ... Yes the elevators run up and down the tethers. ... >> A more interesting option maybe to build a big energy farm on the moon. ... mechanical engineers make weapons and civil engineers make targets. ...
    (soc.culture.irish)
  • Re: LA-4541-MS
    ... Tethers don't make a lot of sense when you ... Say using nuclear pulse rockets you bring an asteroid to Earth orbit, ... The moon seems nearly devoid of water. ...
    (sci.space.policy)
  • Re: Nuclear rockets.
    ... You yourself said they'd require 256 million tons of materials - ... tooling on the moon. ... tethers begin to make sense. ... spare loot after your WWIII deals with the fossil and yellowcake ...
    (sci.space.policy)
  • Re: beanstalks (was Re: Metallic hydrogen ...)
    ... We are not proposing such projects. ... The physics behind space tethers and space elevators have been ... Making tether/space elevator climbing elevator cars ...
    (sci.physics)
  • Re: beanstalks (was Re: Metallic hydrogen ...)
    ... We are not proposing such projects. ... The physics behind space tethers and space elevators have been ... Making tether/space elevator climbing elevator cars ...
    (sci.astro)
Loading