From: Gary Hoffman (ghoffman@spacetech.com)
Date: Fri Jul 26 2002 - 14:50:48 PDT
Come on Ron... Microwaves sent from Earth ?? Into another solar system
light years away ???
We have to have some sense of the relative sizes and distances of things
after all. Earth orbit is one hell of a lot closer.
Gary
----- Original Message -----
From: "Ron Blue" <rcb5@msn.com>
To: "Gary Hoffman" <ghoffman@spacetech.com>
Cc: "setipublic" <public@setileague.org>
Sent: Friday, July 26, 2002 11:29 AM
Subject: Re: SETI public: Jill Tarter on the Fermi Paradox
> A magnetic sail is used to get thrust from microwaves sent from earth
based
> radio transmitters. The trailling wire is used to slow down the ship for
> better picture taking when it gets to the next solar system. You could
use
> the electricity generated by the wire to sent the pictures to earth.
>
> Good question. The current produced was so strong that it burned out the
> wire deployed from the space shuttle. You could temporary store that much
> power input into spinning gyroscopes. It was suggested that if you had
ring
> of gyroscopes and mechanically forced them to turn around the circle you
> would get forward motion. In orbit over along period of time you could
use
> this for some control. Assuming this was true, one large circle of
> flywheel energy storage devices and two small circle flywheel energy
> storage devices could be used to deflect the direction.
>
> I can not grasps these concepts because it seems to me that all the forces
> should cancel out and you get nothing. There are no free lunches. For
> example we exchange at a very high cost the energy sent to a probe with no
> fuel for energy stored in it at very low efficiency as forward momentum.
>
> Ron Blue
>
> "Gary Hoffman" <ghoffman@spacetech.com>
> > Ok... so,
> >
> > You deploy a long wire.
> >
> > It moves through local magnetic fields...
> >
> > Thus a small EMF is induced in the wire...
> >
> > You conduct the small EMF into the craft....
> >
> > And you produce THRUST with it HOW ???
>
>
>
>
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