Ok, so an exterior testing session is warranted and no dangerous operations
must be done while the contraption is on. I can find a sand pit and put the
contraption in there for failure testing. I have a van, so transporting my
5500W generator for the electric air compressor is not a problem either.
How can you pull the vacuum down 2 atmospheres? Assuming I am at 1
atmosphere, isn't 0 a vacuum? Or did I miss something and you can a bigger
vacuum? Huh? How can you go to negative atmosphere? I thought atmospheres
were mostly used for pressure chambers.
I often see reference to 0-30Hg for vacuum chambers, something about mercury
level. I figure I'll see where the vacuum dial sits at rest, and where it
goes as air is pumped out is the vacuum side.
Robert
:)
Sound waves can shatter your ear drums. Your heavy layers of cloth will
probably not help much here but your ear protectors are a good bet. While
it is
true that explosion is worse, implosion carries some of the same issues.
Stuff
can fly. Here a heavy blanket is best. The other thing that most people
don't think about is shock factor. What are you doing when it blows (Or
sucks in
this case! 8>)) LOL If you are cutting out a previous mold you could
seriously cut yourself or others.
PLEASE! I am not trying to scare you! Just be prudent and be careful! Keep
the kids out of the way! ALWAYS ALWAYS test out a new device of this type
OUTSIDE for the first couple of times! If your going to pull it down 2
atmospheres normally pull it down to 3 several times as a safety check! A
failure
outside is a whole lot safer then inside!
In closing just be safe! I have 3rd degree burns over 33% of my body from a
stupid mistake 20 years ago that to this day remind me to be careful!
Ray Russell
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