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Re: Re: ArcJet Update



Well for my 2 cents, ... AO-40 has been great fun, ... makes Apollo 13 look
like a sim, ...I'd never had learnt so such about the rocket business if it
had been textbook!

Keep getting the telem and sending it in!!!!

----- Original Message -----
From: "Frederick M. Spinner" <fspinner@hotmail.com>
To: <amsat-bb@AMSAT.Org>
Sent: Monday, July 09, 2001 7:59 PM
Subject: Re: [amsat-bb] Re: ArcJet Update


>
> >  Instead we could have reduced the apogee height
> >making it a 16h orbit, but this also makes not such a big deal at
> >the low inclination and the pathloss also does not really get much
> >better..  so what?
> >
>
> Well, if it was possible to reduce the apogee 10K KM or so it would have
> made a small difference... possibly allowing higher NF downconverters to
> work ala "easysat" guidelines.  But I also contend that a HEMT preamp
(which
> is the only really "extra" requirement over the "easysat" scenario) for a
> groundstation is NO BIG DEAL.
>
> The 16h orbit would have been nice (but only if it could have been kept
> stable, which is doubtful under the circumstances) in that antennas could
> have been pointed at a "fixed apogee" in the sky, meaning that rotors
> wouldn't have been required for ground stations.
> But with the low inclination, polar mounts could be made to work, and with
> the demise of C-band systems, they should be available for many of us for
> scrap.
>
> >Indeed, it is very disappointing that we could not demonstrate the
> >Arcjet burning "hot". On the other hand, ATOS has never flown before
> >and it is highly experimental and rocket science. At least we learned
> >that this type of TFMC (mass flow controller) is not flight worthy..
> >Something which could not have simulated on ground..
>
> > > 7. What's going to break next?
> > >     ---------------------------
> >
> >No risk, no fun?
> >
>
> Yup, AO-40 is more interesting and fun for a technical type like me *WITH*
> the problems.  I've actually caught myself trying to analyze what has
> happened, and I've been fairly correct so far in my analysis.. but
> thankfully, I've kept it mostly to myself!!!  :O)
>
> Fred W0FMS
>
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