mayf,
Remember too that cars that don't go over 175 in the 1/4 mile trap at the
start of the three timed miles are not supposed to go the full three miles
of timed traps. The thinking being that they are usually peaked at that
speed and won't improve their times over the next two miles. The exception
is streamliners. Helps to clear the course for faster cars waiting at the
start.
Might want to go back and study only the vehicles that take all three miles
of timed traps for additional data. Cars like Nolan White #131 Autopower
Special for instance. From the times you'll see they are really going and
then blow one of the two engines and continue to pick up speed but not at
the same velocity as over the 1/4 and first mile. Messes up averages big
time.
Wes
on 10/6/01 4:17 PM, Gary & Ellen at garyellen@uswest.net wrote:
> Mayf
> We run the short course cars and the long course cars on the same course, so
> some cars will complete thier run at the 3 mile and exit the course before
> the 4 mile. We also run 150 CLUB cars on the same course, they complete
> thier run at the 2 1/4 light then exit the course, most before the 3 mile.
> Happy calculating.
> Gary & Ellen Wilkinson
> Utah Salt Flats Racing Association
> ----- Original Message -----
> From: "DrMayf" <drmayf@teknett.com>
> To: <land-speed@autox.team.net>
> Sent: Friday, October 05, 2001 11:23 PM
> Subject: WOS Time Slip Data Massage...
>
>
>> Well, I finally got the data sorted to my liking, although I haven't
> really
>> plotted it. In fiddling with the time slip data I made a few internal
> ground
>> rules. That is a vehicle needed to make it at least to the 3 mile flags so
>> that car would have had to get 2 speeds: one at the 2 1/4 trap and through
>> the full first measured mile. If a vehicle reached top speed and slowed
>> through the next mile, I used only the top speed and mile marker where
> that
>> occurred. I normalized each vehicle to it's top speed. So here is some
>> preliminary info and maybe the final look also. Not as interesting as I
>> thought it would be.
>>
>>
>> Mile % of Max Speed # of Vehicles
>> 2.2500 0.9464 82
>> 3.0000 0.9651 82
>> 4.0000 0.9802 43
>> 5.0000 1.0000 29
>>
>> That is of the 82 vehicles that surrived the ground rules I set up, the
>> average spercentage of their individual maximum speeds was 94.64 percent.
>> That is 100% of the 82 vehicles was able to reach an average of 94.64 % of
>> their top speeds. That same 82 vehicles made it to the 3 mile flag
>> (naturally, my ground rule!) and they were able to gain speed up to 96.51%
>> of their top speeds by that point. Now it is interesting that nearly one
>> half, 39, bailed out between the 3 and 4 mile marker. I do not know
> whether
>> or not this was automotive darwinism in action or they were somehow
>> licensing runs. But those remaining 43 vehicles gained another few
>> percentage points: 98.02% of their top speeds. Again there was a drop in
> the
>> number of vehicles running for the 5 mile flag. In this final category,
>> these vehicles finally reached their top speeds.
>>
>> What does it all mean? I don't have the foggiest notion. A mental exercise
>> for me...interesting? I am not sure any longer. Pareto's law was ambushed
>> because my hypothesis was that 100% of the cars would reach 80% of their
> top
>> speed in 20% of the distance. Well, 20% of the distance is mile 1 and
> there
>> is no time trap there...so was doomed from the git go.
>>
>> mayf, the confused, really ignorant, no dumb, desert rat in Pahrump.
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