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Dennis Block wrote:
>>I have access to "the CRC handbook" for chemical engineers & looked up a table
showing various conductive values for gasses.  This table shows that, at room
temperature, argon gas will conduct 41cal/sec, air conducts about 60cal/sec,
and carbon dioxide gas conducts 35cal/sec (the lower the value - the better the
insulator).  Has anyone tried CO2 gas to fill a suit?  This  seems to be a much
more economical solution to keeping warm...<<

Dennis,
you have a humid condition inside your drysuit. CO2 and H2O will form carbon
acid(sp?) and cause skin irritation.
Do not even use argon mixed with CO2 for welders purposes. Argon is a cheap gas
and the best option you have.
While several years ago there may have been a controversion about Argon having
an ill effect on  the decompression, nowadays we have evidence that it is no
problem. 

Regards, Reinhard

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