Re: [ATM] PPPP

[creator <creator@subarcsec.com>]

Greetings,

 > On Wed, 14 Jun 2006, Kevin MIchael Zabbo wrote:
 >
 > > Don't use water, it can freeze.  I suggest using
 > > either a light mineral oil or an alcohol-based
 > > flotation medium and recirculate the fluid, of course.

An ordinary mix of water and anti-freeze, 50/50, would also work
well. Ethylene glycol is as incompressible or more so than water.

 > Water was only a question, from the start. Appropriate material
 > would also have other properties, such as high density
 > for efficient displacement. Water is so cheap, that it makes
 > an excellent test platform and is surely what woul have been
 > tested historically. The freezing of water can be offset simply
 > by addition of salt, which would also increase the density.

I wonder how much salt you would have to add? I've seen inlets in
the north Atlantic freeze over. :)

 > BTW, I have not particular opposition to hydraulic and pneumatic
 > systems. My question was partly for historical reference, but I
 > am also not sure how much success has been possible.

Dominic-Luc, I've tried a couple of times to reach you "off-list"
and I am wondering if perhaps your "SPAM" trap may have prevented
my mail from coming through?

In any case, if you would be kind enough to write to me at the
address below I would appreciate it. :)

Regards,

-Dann
==
Dann McCreary - creator-at-subarcsec.com -  http://subarcsec.com
"The heavens are telling of the glory of God;  and their expanse
  is declaring the work of His hands"  -     Psalm 19:1    (NASB)


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