From: Daniel Boyd Fox (foxd@indiana.edu)
Date: Sun Jul 28 2002 - 09:20:41 PDT
Would you say that friction is the same as thrust?
On Fri, 26 Jul 2002, Gary Hoffman wrote:
> As I said before...drag is the same thing as thrust...just pointed in the
> opposite direction.
>
>
> ----- Original Message -----
> From: "Daniel Boyd Fox" <foxd@indiana.edu>
> To: "Gary Hoffman" <ghoffman@spacetech.com>
> Cc: "Ron Blue" <rcb5@msn.com>; <public@setileague.org>
> Sent: Friday, July 26, 2002 11:36 AM
> Subject: Re: SETI public: Jill Tarter on the Fermi Paradox
>
>
> >
> > A generator without a load is easier to turn than a generator with a load.
> > The generator is converting energy of motion into electrical power. In
> > the case of the long wire on the spacecraft, the energy of motion of the
> > spacecraft is being converted to electrical energy. It really isn't
> > thrust, it's drag on the spacecraft.
> >
> > 73,
> > Daniel Fox
> > KF9ET
> >
> >
> > On Thu, 25 Jul 2002, Gary Hoffman wrote:
> >
> > > 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 ???
> > >
> > >
> > > ----- Original Message -----
> > > From: "Daniel Boyd Fox" <foxd@indiana.edu>
> > > To: "Gary Hoffman" <ghoffman@spacetech.com>
> > > Cc: "Ron Blue" <rcb5@msn.com>; <public@setileague.org>
> > > Sent: Thursday, July 25, 2002 10:46 AM
> > > Subject: Re: SETI public: Jill Tarter on the Fermi Paradox
> > >
> > >
> > > >
> > > > He just said a long wire, he did not say it was Light Years long.
> > > >
> > > > 73,
> > > > Daniel Fox
> > > > KF9ET
> > > >
> > > > On Wed, 24 Jul 2002, Gary Hoffman wrote:
> > > >
> > > > > Certainly, a tether a few 100 yards long, or even miles long, is
> > > perfectly
> > > > > reasonable... but Light-Years long ???!!!
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Daniel Boyd Fox" <foxd@indiana.edu>
> > > > > To: "Gary Hoffman" <ghoffman@spacetech.com>
> > > > > Cc: "Ron Blue" <rcb5@msn.com>; <public@setileague.org>
> > > > > Sent: Wednesday, July 24, 2002 11:00 AM
> > > > > Subject: Re: SETI public: Jill Tarter on the Fermi Paradox
> > > > >
> > > > >
> > > > > > Think of the shuttle tether experiments.
> > > > > >
> > > > > > 73,
> > > > > > Daniel Fox
> > > > > > KF9ET
> > > > > >
> > > > > >
> > > > > > On Tue, 23 Jul 2002, Gary Hoffman wrote:
> > > > > >
> > > > > > > A long wire ????
> > > > > > >
> > > > > > > Please !
> > > > > > >
> > > > > > >
> > > > > > > ----- Original Message -----
> > > > > > > From: "Ron Blue" <rcb5@msn.com>
> > > > > > > To: <public@setileague.org>
> > > > > > > Sent: Tuesday, July 23, 2002 11:50 AM
> > > > > > > Subject: Re: SETI public: Jill Tarter on the Fermi Paradox
> > > > > > >
> > > > > > >
> > > > > > > > > Looking for Alien Space Probes is going to involve looking
> for
> > > > > objects
> > > > > > > in
> > > > > > > > > space that do not appear natural and studying them closely
> to
> > > see
> > > > > what
> > > > > > > > > they are. Even if they are not Alien Space Probes we will
> still
> > > > > gain
> > > > > > > > > scientific knowledge from doing this.
> > > > > > > >
> > > > > > > > My understanding is that we may be able to send probes by
> using
> > > beamed
> > > > > > > > microwaves from the earth to power the probe and get it close
> to
> > > the
> > > > > speed
> > > > > > > > of light at high energy cost in a short period of time. The
> probe
> > > > > would
> > > > > > > > zoom past the extra solar planetary system and send back
> pictures.
> > > > > > > >
> > > > > > > > A rather novel approach of slowing it down would be to send
> out a
> > > long
> > > > > > > wire
> > > > > > > > and use magnet fields to slow it down. Naturally these
> approaches
> > > > > should
> > > > > > > > generate allot of radio noise which SETI could detect.
> > > > > > > >
> > > > > > > > Ron Blue
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > >
> > >
> > >
> >
>
>
>
This archive was generated by hypermail 2.1.2 : Sun Jul 28 2002 - 09:29:51 PDT