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Re: Arcjet Motor



Different rocket engines have different efficiencies. The main factor is the
exhaust velocity -- the higher the better. Using only an arcjet would
require more fuel and make the satellite more expensive to launch.

73,

John
KD6OZH

----- Original Message -----
From: <sco@sco-inc.com>
To: "James Sharp" <jsharp@psychoses.org>
Cc: <amsat-bb@AMSAT.Org>
Sent: Monday, 04 June 2001 15:37 UTC
Subject: Re: [amsat-bb] Arcjet Motor


> At 03:30 AM 6/4/2001 , you wrote:
> > >
> > > The arcjet motor uses simple fuel, that we can test ... here on earth.
> > > Perhaps the next satellite will be smaller than AO-40 and use the
arcject
> > > (if it works well on AO-40) as its only propulsion system?
> > >
> >
> >That all depends on the orbital parameters we want versus what we'll get
> >from the launch.  If we want a high inclination orbit, but get a launch
> >into a GTO, the arcjet just isn't going to have the guts to move the bird
> >in a reasonable amount of time...but if we end up with a favorable launch
> >orbit and just need to tweak it, the arcjet will work just fine.
>
> I would rather take more time in moving the satellite (if the arcjet would
> work) instead of again risking the fact that we might blow up part of the
> satellite using the same engine/fuel combination now on AO-40. I would
> rather be "Safe" than "Sorry" ... even if it took longer to get to the
> intended orbit.
>
> W4SCO
>
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