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Date: Mon, 10 Jul 2000 17:56:06 +0200
From: mat.voss@t-*.de* (Matthias Voss)
To: Trey <trey@ne*.co*>
CC: MMikeodin@ao*.co*, rsilvers@ph*.co*, techdiver@aquanaut.com
Subject: Re: Argon in drysuit -- how much warmer?


Trey schrieb:
> 
> This is totally ignorant bullshit.
Compared to your normal nomenclature, does this mean, you partially
agree ;-)?

 Argon is a far
> superior gas for suit inflation than air or anything
> else, and it increases the effectiveness of
> Thinsulate insulation by 50%.

This may right, espescially regarding thinsulate. But Mike compared
argon use regarding different types of breathing gas. Do temperature
losses add arithmetically, or in a logarithmic scale ?
according to most known laws or rather rules of perception ( Weber-
Fechner's, to name one), bodily reactions to pphysical changes are
measured in a decibel scale. Translated to heat-loss terms this would
mean, that even if your suit Isolation may be better, the loss by
expansion and conductivity of breathing gas outweighs the win .
 
> If the suit floods at all, Argon and thinsulate
> combination is still better than regular insulation
> dry with no argon.

Won't like to try out , but if it's right, is it because of argon
bubbles kept within the tissue ?

 
> You also have to flush the air out of the suit prior
> to the dive with argon.

This seems to make a lot of sense, indeed.
regards
Matthias
 
> -----Original Message-----
> From: MMikeodin@ao*.co* <MMikeodin@ao*.co*>
> To: rsilvers@ph*.co*
> <rsilvers@ph*.co*>; techdiver@aquanaut.com
> <techdiver@aquanaut.com>
> Date: Monday, July 10, 2000 3:46 AM
> Subject: Re: Argon in drysuit -- how much warmer?
> 
> Argon in an extra bottle makes only sense if you
> dive mix.
> As you need an extra gas for suit inflation.IMHO if
> you dive N2O2 only you
> won´t need argon.
> Even when diving mix I ´ld rather take air and eat
> some more pasta the night
> before than using argon.
> The suit should leave enough space to wear an G400
> undersuit.
> Check the undersuit, avoid a too loose fit of the
> undergarment as this is a
> major reason for migrating air in you drysuit.If the
> underwear is too wide
> bring it to the taylor and alter it to your needs.
> TLS+G400 should fit in a way that you can move
> without anyrestricions.
> If your dives last longer&it´s still cold although
> eating pasta+G400 it´s
> still time to think about argon inflation.
> Mike
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