On Mon, 20 Oct 2003 07:57:08 -0400, Glenn Ashmore
wrote:

If you can find an old, and I mean REALLY old, compressor with single
intake and output ports and maybe cooling fins it will last an
acceptable time but anything built after they changed from latches to
magnetic sealing strips will crap out very quickly.

William R. Watt wrote:

Maybe he means 25 inches of vacuum, now is it inches of water or mercury (big
difference between the two)? Since atmospheric pressure at sea level is 14.7
psi there is know way he is pulling 25 psi vacuum unless he has it in a tank
pressurized to 10 psi above atmospheric.

JJ

There is a website describing how to use a discarded 'fridge compressor
for vacuum bagging. The fellow who tried it used a vaccum gauge from an
automobile in his configuration and claims he got 25 psi vacuum for his
project. He just used standard plumbing fittings to connect the vacuum bag.

I do not have the website address. I was browsing on a computer at the
public library at the time and did not write it down. However you can
find it by going to www.boat-links.com, clicking on "The Mother of All
Boat Links", clicking on the first box "amateur boatbuildign and repair"
and scrolling down untill you find the link about vacuum bagging.

Nowadays all discarded 'fridges go to a recyling depot where they "vacuum
bag" the freon gas to protect the ozone layer of the atmosphere. It should
be easy to get a compressor by telephoning the miniciapl garbage
department. Since compressors do wear out it would be a good idea to look
for ones off later model 'fridges (the date of manufacure should be on a
label on the 'fridge) bring home 2 or 3 to try.


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James Johnson
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