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Post by dave632 on Oct 13, 2014 8:14:40 GMT -7
Here is another that was even closer, 4 ten thousands.  Once again the losing car was slightly better in performance but lost due to reaction time. It does not seem to matter that cars are started at the same time, each car reacts differently. |
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Trackmate
Oct 13, 2014 16:55:45 GMT -7
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Post by pceng on Oct 13, 2014 16:55:45 GMT -7
Here is another that was even closer, 4 ten thousands. Once again the losing car was slightly better in performance but lost due to reaction time. It does not seem to matter that cars are started at the same time, each car reacts differently. Hey Dave, what are you using to start or run cars...... controls or DP switch ? Are reaction times closer with like cars ? ...... Peter |
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Post by dave632 on Oct 13, 2014 17:48:45 GMT -7
I have a button that starts both lanes at the same time. I also have a setup with 2 switches for independent lane starts. Similar type cars do not seem to have the same reaction times. These two cars are similar in size yet one left the beam almost 4 hundredths quicker than the other yet it was slower to the 60' mark. I know 4 hundreds of a second is not much time but when you are dealing in thousands it is a lot. If I figure out what is going on I will let you know but it seems like each car has its own personality. I tried my first bracket run tonight and the system works fine. I would need two drivers to run that as it is tough to concentrate on two lanes when there is a difference in dial in.
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Deleted
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Post by Deleted on Oct 13, 2014 18:01:17 GMT -7
dave, may I suggest running the cars in both lanes and comparing the results to see if they react the same in both lanes?
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Trackmate
Oct 13, 2014 19:36:17 GMT -7
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Post by pceng on Oct 13, 2014 19:36:17 GMT -7
dave, may I suggest running the cars in both lanes and comparing the results to see if they react the same in both lanes? What , Al said....... & try one car at a time in each lane. Is it always the faster of the two that is slower to react ? |
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Post by dave632 on Oct 13, 2014 22:15:41 GMT -7
It is not always the fastest car that reacts quickest. I will check reaction times in different lanes and see how that goes tomorrow.
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Trackmate
Oct 14, 2014 7:45:57 GMT -7
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Post by pceng on Oct 14, 2014 7:45:57 GMT -7
Hey Dave, was thinking it might be quicker of the two cars that left slower........ taking longer to draw power to load arm.
With two cars, same parts and set-up. Right down to brush & pick-up pressure. May perform differently....... one might be all torque & no top end , the other opposite. Or a combination of both.
If you ever figure this out let us all know ! May have something to do with the way the arms are wound.
...... Peter
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Post by dave632 on Oct 14, 2014 9:03:54 GMT -7
I will do that Peter. It would make some sense that the car that draws the most amps might be slightly slower to react. I will put that to a test and let all know. By the way I actually had a dead heat down to the 10 thousandth. I did not think this would happen but here is the result. No finish margin is noted and when you add up the difference in reaction and ET you get 34 thousands on both ends.  |
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Post by Deleted on Oct 14, 2014 15:53:31 GMT -7
I would like to point out that the car with the higher ET also had Higher MPH.
this happens more than anticipated and indicates that wheel spin or something allows the car to be moving faster through the traps although it took longer to get there.
this does happen in 1:1 drag racing as well.
speaking of AMP draw, used to bracket race 1/24 and there were guys who would use "huge" motors that draw lots of AMPs and put a good deal of weight in the car so that they would draw even more.
this would slow the other car dramatically.
people have tried to overcome that by having completely separate power sources, but you can never guarantee 100% equal power at all times that way either.
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Post by dave632 on Oct 14, 2014 18:06:31 GMT -7
Yes generally in full size racing if a car MPH at say 100 in the 1/4 and he blows the tires away at the start for a poor 60' the MPH in the traps changes little from a good start and good 60'. I would think the same would transfer to the smaller cars.
Your statement about AMP draw makes sense and I can see the "huge motor" idea working, but 2 separate power sources should cure that problem.
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Post by dave632 on Oct 14, 2014 18:46:56 GMT -7
Put another computer on the trakmate system and it got rid of the Error messages. I must say the tech response from trakmate is NOT good. I only received 2 messages returned out of 10 I sent and one asked when it was a good time to call. I answered that but there never was any phone call.
In comparison Slot dragon answered me every time. MUCH better with tech help or answering questions about the product.
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