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From: Clifton_RL@cc.curtin.edu.au
Newsgroups: rec.skydiving
Subject: Re: <None>
Message-ID: <4558.2744206e@cc.curtin.edu.au>
Date: 16 Nov 90 09:22:54 GMT
References: <1990Nov11.152602.18547@crl.dec.com>
Organization: Curtin University of Technology
Lines: 22

In article <1990Nov11.152602.18547@crl.dec.com>, geer@crl.dec.com (Dan Geer) writes:
> Anyone have a terminal velocity wind chill table?

It's pretty hot round here, but if I understand the concept of wind chill 
correctly, it is referring to prolonged exposure, rather than brief as in 
free falls.

Then, the surface of one's skin has time to equilibrate with the 
radiation balance, the fine arteries have closed up and a temperature
gradient has developed across the fat layer.

After all noone frets at dipping a naked hand into the freezer for an ice cream.

For that matter, 40 seconds in freefall for a moderately protected jumper doesnt
represent much of a heat loss.  It is the two minutes of gliding with your 
hands in the wind that gives you the blue knuckles because only then can
your flesh lose all the heat.
 
Try checking the canopy etc, but still leaving your keepers in the toggles
until one grand - the CRW minimum cutaway height.

Cheers!	           Roger Clifton, Kalgoorlie, West Australia