[time-nuts] temperature stability basics

William H. Fite omniryx at gmail.com
Sat Nov 27 23:56:30 UTC 2010


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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