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Question on drag racing software


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#1 hoffmanbrent

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Posted 01 May 2021 - 06:54 AM

Is the finish margin a calculated time from the difference of the two lanes RT & ET added together? or, is it an actual measurement of time between the two cars crossing the finish line?


Brent Hoffman




#2 MSwiss

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Posted 01 May 2021 - 01:20 PM

I'm not a computer guy, but if I had to guess, I would say it takes each lanes results, and comes up with the finish margin.

 

The two examples below, and a the few times I've computed it before, it always matches to to the exact same #.

 

If it was somehow timing across the two lanes, at the finish, I would think that last .0001 would sometimes be off by a digit.

 

I'm sure Daniel at Trackmate could answer your question.

 

Why are wondering about that?

 

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Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
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Two-time G7 World Champion (1988, 1990), eight G7 main appearances
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#3 hoffmanbrent

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Posted 01 May 2021 - 02:07 PM

I have built my own timing system and actual time varies few thousand to the calculated, so it made wonder if my timing is off slightly.
Brent Hoffman

#4 Dallas Racer

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Posted 01 May 2021 - 08:01 PM

I've never thought about any of this before. Why doesn't the E.T. include the R.T.? It seems to me that the E.T. would start timing when the green light comes on, and stop when the car crosses the finish line.


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#5 MSwiss

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Posted 01 May 2021 - 09:18 PM

The ET with Trackmate, starts when the guide of the car physically clears the 2nd sensor in the staging area, similar to how the front wheel of a motorcycle or car controls the ET timing in a 1/1 race.

https://www.dragbike...fect-a-runs-et/

https://www.autoweek...at-colors-mean/

Having it split into reaction time and ET makes perfect sense.

Racers want to know both.

And without it being split/timed separately, bracket racing would be impossible.
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Mike Swiss
 
Inventor of the Low CG guide flag 4/20/18
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990), eight G7 main appearances
Eight-time G7 King track single lap world record holder

17B West Ogden Ave., Westmont, IL 60559, (708) 203-8003, mikeswiss86@hotmail.com (also my PayPal address)

Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516






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