"Tom S" > wrote in message
. com...
>
> "Ray Calvert" > wrote in message
> . com...
>
> A whole lot of basic physical calculations...
>
> > See, it really is simple, right? ;o) I know you knew all this from
> > physics and had just forgotten it. Now you are running your own physics
> > lab in your home. I have seen physics labs blow up before!

FWIW, there is one at the University of New Orleans that is radioactive
and sealed shut for a half-life or two..... Damned screwy Cajuns!
>
> Although winemaking seldom gets _that_ dramatic, there is a lesson to
learn
> he
>
> If you insist on bunging tight a glass carboy topped full, do it when the
> wine is at the _warmest_ temperature it is likely to encounter. That way,
> all ensuing temperature shifts will result in variations in the _vacuum_
in
> the headspace. Carboys seem to be considerably more tolerant of vacuum
than
> pressure, and the pressure can never drop below the vapor pressure of the
> wine (which I'd estimate at ~30mm Hg.
>
> Tom S
>
>