John,
If they used the same " easy on tires" race track paving mix material as
they did at AMP here in AZ (probably the same SCCA race track consultant),
it has an abrupt (but only medium grip) breakaway characteristic and if a
lot of cars run on it, it generates black dust that is slippery.
Does that sound like the "new" Topeka that you ran on?
I'm afraid that there may not be any mechanical nor chemical reason for it
to ever get grippier with time. In fact, it may get more slippery since it
may polish up. A lot of cars running on it also may generate ruts and
certainly dust.
I hope that isn't the case for all our sakes that run there, but I've heard
that some race track asphalt surfaces like this are grippiest when first
built and then it it downhill after that.
If there are sharp rocks or rough pebbles in a pavement that become exposed
as the top surface gets worn away, it might get better. However it is my
guess that Topeka is a consistent mix all the way through of sand,tar, and
polymers. (old ground up street rubber is a polymer)
The best one can hope for is that it is clean when one runs.
This is only conjecture. I have no proof of that this actually is the
composition at Topeka.
This is just what I suscept from knowing how AMP was built, running on AMP
for a year before it was closed, and talking with Howard Duncan about
Topeka's new paving plans a few years ago.
Chuck
From: John Whitling <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: [F500] Solo 2 Nationals?
Date: Mon, 12 Jun 2006 21:09:47 -0400
So what was the weather like out there Jan? Was it sunny or cloudy?
Thanks
John Whitling
Jan Schmidt wrote:
I ran a local event yesterday at HPT in Topeka. This is the new solo 2
location for Nationals. Kudos for Gary Kramar for winning both days. His
Dad, Ed also did well and watch out for the young Macabee, he kicked my
butt on a car that is new to him. I was not disappointed with my car, or
my driving, just very disappointed in the new surface. Apparently, they
are going to set up Nationals with an East and a west course, because
there is only a North entrance. We were running 60 second courses using
the entire pad. My guess is that Nationals will be two 35 second
courses? The new pad has had 3 autocrosses on in and it is still slick
as snot and has some weird milling in some areas, like they were trying
to do the California rain grooves. Anyways, I hope they get this mess
figured out, soon. I will take the rough as hell Forbes field over the
smooth HPT surface anyday. The temps were in the high 80's both days and
plenty of sunshine. Maybe it will just take about 3 years of mother
nature to let the asphalt lose its "greeness."
Bill Schmidt 88 Red Devil Kawi
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