[time-nuts] temperature stability basics

William H. Fite omniryx at gmail.com
Sun Nov 28 00:24:50 UTC 2010


I have a "connection."  I'll inquire, just for the heck of it, and let you
know.




On Sat, Nov 27, 2010 at 7:00 PM, J. Forster <jfor at quik.com> wrote:

> At this point, bits of the Shuttle are "collectibles" and are priced
> accordingly. Just like genuine Apollo bits, they aren't making it any
> more. What was a couple of bucks surplus in the 1960s now brings far more.
>
> FWIW,
>
> -John
>
> =================
>
> > No more costly than big pieces of aerogel and, since NASA's acceptance
> > standards are so high there has to be some around that failed quality
> > checks....
> >
> >
> >
> >
> > On Sat, Nov 27, 2010 at 6:30 PM, J. Forster <jfor at quik.com> wrote:
> >
> >> You could probably buy enough pink fiberglass to insulate a house for
> >> what
> >> one of those cost. They might even cost more on eBay
> >>
> >> -John
> >>
> >> ===============
> >>
> >>
> >> > How about surplus HRSI tiles off the Shuttle?
> >> >
> >> >
> >> >
> >> > On Sat, Nov 27, 2010 at 1:47 PM, Poul-Henning Kamp
> >> > <phk at phk.freebsd.dk>wrote:
> >> >
> >> >> In message
> >> >> <05fb5f7f819d035fdc8556f9b4842b98.squirrel at webmail.sonic.net>,
> >> >> "Rick
> >> >>  Karlquist" writes:
> >> >>
> >> >> >The general consensus was that
> >> >> >all foams were more or less similar thermally,
> >> >>
> >> >> There is indeed very little difference, in particular if the foam
> >> >> is encapsulated so the open/closed bubble difference is eliminated.
> >> >>
> >> >> These days aerogel is the big thing, and Aspen Aerogel's "spaceloft"
> >> >> series of products are seeing a lot of use in tight spaces.
> >> >>
> >> >> It is also possible to buy aerogel as granulate, for instance from
> >> >> United Nuclear, but be aware that it will draw moisture like there
> >> >> is no water tomorrow, so always use gloves and a respiratory filter.
> >> >>
> >> >> I'm not sure the mechanical strength of aerogel would be any use
> >> >> for military OCXO's[1], but for lab-settings, it would work fine.
> >> >>
> >> >> Poul-Henning
> >> >>
> >> >> [1] People tend to forget that aerogel is one of the strongest
> >> >> materials *relative to its weight*, and at the same time the
> >> >> solid with the lowest density.  The first thing people do on
> >> >> picking up a piece of aerogel is typically to crush it.
> >> >>
> >> >> --
> >> >> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> >> >> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> >> >> FreeBSD committer       | BSD since 4.3-tahoe
> >> >> Never attribute to malice what can adequately be explained by
> >> >> incompetence.
> >> >>
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> >> >>
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> >>
> >>
> >>
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> >
>
>
>


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