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RE: Atwater questions

To: "John J. Stimson-III" <john@harlie.idsfa.net>
Subject: RE: Atwater questions
From: "Tibbals, Paul" <PHT1@pge.com>
Date: Thu, 15 May 2003 15:49:38 -0700
Hey, this overanalysis thing at least works as a conversational gambit!   8D
        -----Original Message-----
        From: John J. Stimson-III [mailto:john@harlie.idsfa.net]
        Subject: Re: Atwater questions


                On Thu, May 15, 2003 at 08:57:39AM -0700, Tibbals, Paul wrote:

                > Well, OK, but wet is different than dry.  Way wetter is a 
smaller
                >  increment.  I hear what you're saying though.

        You might think that, but I lost 2-3 seconds due to "somewhat wetter" in
        San Diego between my 1st and 3rd runs.  The 3rd run felt technically
        better, too.

I might think that, but I only based it on the numbers from Atwater.  For STS, 
the Saturday to Sunday changes were from 1.5 to 5.5 seconds, most being ~3.5 to 
4 seconds.  Admittedly (before Peter jumps back in ;)  a limited sample with 
poor control from run to run and 'rain to rain'.  Katie, with the two course 
directions both in dry conditions, ran about 1.25 seconds faster on Sunday.  So 
for that course and those cars, ~3 seconds rain/dry difference TOTAL is a round 
number.  Darn it, I didn't have my Geez unit working on Saturday so I can't do 
any apples to apples comparisons.

I'd add in the difference in the types of friction force available between wet 
and dry, but since we were all using very similar tires I'll neglect that for 
now.   Plus I can't find the Web page that summarized it nicely....

I'm sure that the difference between wet and "monsoon", the latter being what 
the San Diego photos showed, is signficant!  

        I think Peter's suggestion that the best car & setup for each class
        may not yet be built (or at least running in our region) explains your
        observation that locally STX isn't much faster than STS.

No argument here.  But I'm not yet to the point of changing vehicles to improve 
my standing, largely (pun intended) because I don't physically fit in most of 
the class-leading models!  Particularly with helmet.  That's the breaks, never 
going to be a Lotus customer....
must....get...back...to work...
PaulT

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