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Racing Discussion => Racing Discussion => Topic started by: bmfgsxr on July 15, 2003, 02:05:59 PM

Title: can the transponders be wrong
Post by: bmfgsxr on July 15, 2003, 02:05:59 PM
we are having a debate between a few of us. a couple guys i race with have laptimers that said a certain time. the ccs transponder had them about 2.8 seconds slower. one guys lap timer was reading a time of 1:22.xxx, then 2.81, then 1:22.xxx, 2.86, and so on and so forth. the other two guys didnt have these little 2.8 second intervals on their timers, but it doesnt seem like the ccs transponder could be off. its statoinary, and giving out a different signal than the laptimers. so can someone from ccs let me know if there is any way it could not be the laptimers...

thanks.
Title: Re: can the transponders be wrong
Post by: THE_D.O.C. on July 15, 2003, 02:16:22 PM
transponders always hurt people's feelings.

shows everyone is full of crap too.  ;D
Title: Re: can the transponders be wrong
Post by: Thingy on July 15, 2003, 02:55:36 PM
Your rider that was getting intervals of 1:22, then 2.8, etc was picking up two beacons at the track.  So, the lap timer was fooled into thinking that he did a 1:22 lap and then a 2.8 lap.  When in reality, he was taking 1:22 to travel most of the track, and then 2.8 seconds to travel the remainder of the track to the next beacon.  (A 1:24.8 lap time)

Your other timers probably did not register the second beacon because of how they are configured.  My My-Chron lap timer can be set up to not register a beacon until a minimum time.  Here is an example:  If I can do 1:15s at BHF, I will set up my laptimer to not register a beacon until 1:10 has gone by.  This way, when my timer starts counting on the front straight and sees another beacon in turn 3, it will ignore it instead of giving me two partial lap times.
Title: Re: can the transponders be wrong
Post by: bmfgsxr on July 15, 2003, 03:53:07 PM
QuoteYour rider that was getting intervals of 1:22, then 2.8, etc was picking up two beacons at the track.  So, the lap timer was fooled into thinking that he did a 1:22 lap and then a 2.8 lap.  When in reality, he was taking 1:22 to travel most of the track, and then 2.8 seconds to travel the remainder of the track to the next beacon.  (A 1:24.8 lap time)

Your other timers probably did not register the second beacon because of how they are configured.  My My-Chron lap timer can be set up to not register a beacon until a minimum time.  Here is an example:  If I can do 1:15s at BHF, I will set up my laptimer to not register a beacon until 1:10 has gone by.  This way, when my timer starts counting on the front straight and sees another beacon in turn 3, it will ignore it instead of giving me two partial lap times.


that is exactly as i assumed. but the problem is. that the guy who was getting a lap of 2.8 had his set up for 3 seconds(to not read another beacon), and the other guys had theirs set up for 55 seconds, but they still had their lap timers reading about 2.8 seconds slower than the time sheets had. so that is why they cant believe that theirs were wrong. but i think it has to be something with a slightly different signal that was just enough to trigger it and slip by the minimum time set up to pick up the signal.. i believe that the lap timers were screwy... i cant see the transponders giving a false time.
Title: Re: can the transponders be wrong
Post by: pitbtch#1 on July 15, 2003, 04:28:44 PM
i think the transponer are stupid cause my dad had a back to back race at mam and the second race he was the only person in the class and forgot to trade transponders on bikes and even no he was the only one in the class almost didnt get scored.  Whats the point of manual scorers to go along with the transponders if they not going to matter.
Title: Re: can the transponders be wrong
Post by: WebCrush on July 15, 2003, 04:38:47 PM
I was the one getting the 2.8 sec readings, but I had a min laptime set so it shouldn't have picked up anyway.

What really threw me off was that it was that CCS transponders were giving me slower laptimes in a race than in practice, which is just NOT the way I ride.
Title: Re: can the transponders be wrong
Post by: r6_philly on July 15, 2003, 06:21:43 PM
race 6 on Sat showed my best lap time was 1.23 on lap 1.

I started on first row, lead 4 laps, couldn't be the 8th fastest time on the sheet, because everyone else had the best time in their 2-6 laps, and would have passed me if they were going 4 seconds faster.

So I went to the scoring tower to get a print out of my times Sunday. They took my name and told me to wait til the end of the day to have it.

At the end of the day, they told me the file was corrupt and it wouldn't show the lap times.

I understand there are problems with new technologies, but I also program stuff, and it shouldn't be this hard to get it right, or they are getting ripped off.

I can't believe a print out where I got my best time on the first lap. So how much do you loose on the start? 2-3 seconds? That would mean I may have done a 1.19 on lap 2.

Now that is important, because I NEED to know. Especially that the bike is now in pieces and never going back together and I may not race agian til next year.....

I really wish I knew what I was doing leading that race... :p

Title: Re: can the transponders be wrong
Post by: THE_D.O.C. on July 15, 2003, 07:41:06 PM
 ::)

next time {if it's SOOO important} have a crewmember put a clock on you.


you couldn't give me kevin elliot's job.
Title: Re: can the transponders be wrong
Post by: EX#996 on July 15, 2003, 08:03:10 PM
Quoteyou couldn't give me kevin elliot's job.

LOL!!!!

Me either, they only pay $2.50 an hour for babysitting.  J/K

Dawn   ;D
Title: Re: can the transponders be wrong
Post by: cabbage996 on July 16, 2003, 06:38:38 AM
At Gateway I had a lap that was 5 hrs and 39 minutes long in my first practice session.  I also had a friend that is very slow out there who we were lapping run a 1:12 and I KNOW that was wrong.
Title: Re: can the transponders be wrong
Post by: ecumike on July 16, 2003, 06:57:42 AM
So far the transponders have been working fine for us.

My wife times me while I'm racing, and her fastest time clocked for me is usually within .5 seconds of what the transponder clocks my fastest time for that race is.

Title: Re: can the transponders be wrong
Post by: davegsxrold929r on July 16, 2003, 09:45:16 AM
we tested the laptimer against a stop watch as well and was within .2 of a second so they are pretty close !!!!    not sure on the 2 beacon thing happening though ??  r6_philly what is your race number ???
Title: Re: can the transponders be wrong
Post by: r6_philly on July 16, 2003, 12:27:47 PM
Quotewe tested the laptimer against a stop watch as well and was within .2 of a second so they are pretty close !!!!    not sure on the 2 beacon thing happening though ??  r6_philly what is your race number ???

I am 977 AM. Ran the MWGP, GTO, GTU, then got destroyed in GTU.

Brad,

I didn't have any crew members. My girl time me when she is there, so I don't have a laptimer. This time I couldn't get a time, and I was trying to ride differently because my lasting injuries, just wanted to know if I was faster with the changes I made, since I never led at summit prior. I would have been really happy if I was going faster even though I was hurt, because I had to look real close at how I ride (so it wont hurt so much when I go fast) and made dramastic changes.
Title: Re: can the transponders be wrong
Post by: sdiver68 on July 16, 2003, 12:36:11 PM
transponders are big ego killers.

Some races, people tell me they are running X.  That's funny, because I was running X+2 and finished right behind them.

My favorite was at Gateway this year.  Transponders didn't work on Saturday, and all kinds of people were claiming some pretty fast lap times.  Come Sunday, with transponder times up, people were scrambling to find out where their 2-3 seconds went.

 ;D
Title: Re: can the transponders be wrong
Post by: r6_philly on July 16, 2003, 01:02:06 PM
I think people usually tell others the time that they THINK they can run. The add in the mistakes, badlucks, lappers and everything else to produce the 2-3 seconds slower "actual" time.
Title: Re: can the transponders be wrong
Post by: bweber on July 16, 2003, 01:17:08 PM
a stop watch will not match a transponder time unless the transponder pickup and the reference point the person with the stopwatch is using are exactly the same.  I would rather have my results based on transponders than manual scoring any raceweekend.  
Title: Re: can the transponders be wrong
Post by: bmfgsxr on July 16, 2003, 01:58:53 PM
Quotewe tested the laptimer against a stop watch as well and was within .2 of a second so they are pretty close !!!!    not sure on the 2 beacon thing happening though ??  r6_philly what is your race number ???


dave, when we ran the lap timer the next day im sure the second beacon was already removed. why else would pdg 's lap timer have a lap time of 2.8 in between every other lap? ??? a second beacon is the only answer. timmy didnt run any other 18's the whole weekend, and i dont believe you ran any 22's the whole weekend (besides what the lap timer says for that race) it would stand to reason that if everyone ran the times their laptimers said in that race that everyone would have run those very same times in a different race ???

im not trying to rob you guys of your times. afterall, it would mean i was running high 18's low 19's. but i ran mid 21's the rest of the weekend.
Title: Re: can the transponders be wrong
Post by: r6_philly on July 16, 2003, 02:05:46 PM
Quotea stop watch will not match a transponder time unless the transponder pickup and the reference point the person with the stopwatch is using are exactly the same.  I would rather have my results based on transponders than manual scoring any raceweekend.  

That is true that person may be faster in one section at a particular lap, and not fast the next lap and cause discrepencies between laptimer and stopwatch readouts. But the average laptime of all the times taken  should be very close.  It is usally not a good idea to base your ability to achieve a certain laptime on one lap. You may have ran a very fast section that cause you to look time in others after you pass the beacon. I guess thats why most beacons are placed on the straight. But it still a good idea to base your laptime ability on an average of multiple readouts.
Title: Re: can the transponders be wrong
Post by: Peanut on July 16, 2003, 03:46:28 PM
I didn't have any problems at summit last weekend.  My timer & the transponder were 1 to 2 tenths off, that's it.   I contribute that to the timer being on the front & the transponder on the back.  

Seemed to be ok all weekend.......
Title: Re: can the transponders be wrong
Post by: r6_philly on July 16, 2003, 06:07:09 PM
QuoteI didn't have any problems at summit last weekend.  My timer & the transponder were 1 to 2 tenths off, that's it.   I contribute that to the timer being on the front & the transponder on the back.  

Seemed to be ok all weekend.......


Man I was so pissed that you were leading those races on sunday (nothing personal man :D) cuz I would have been right there fighting with ya.

I have been getting great starts, and I knew I can fight up front after leading those laps in GTU (before the... errr... crash obviously). Man was I pissed that I wasn't out there.
Title: Re: can the transponders be wrong
Post by: davegsxrold929r on July 17, 2003, 11:40:25 AM
Quotedave, when we ran the lap timer the next day im sure the second beacon was already removed. why else would pdg 's lap timer have a lap time of 2.8 in between every other lap? ??? a second beacon is the only answer. timmy didnt run any other 18's the whole weekend, and i dont believe you ran any 22's the whole weekend (besides what the lap timer says for that race) it would stand to reason that if everyone ran the times their laptimers said in that race that everyone would have run those very same times in a different race ???

im not trying to rob you guys of your times. afterall, it would mean i was running high 18's low 19's. but i ran mid 21's the rest of the weekend.

i agree,. i am still happy with the 23's......  and yes if you add adam 2 times together you get what the sheets said !!!!  
Title: Re: can the transponders be wrong
Post by: Peanut on July 18, 2003, 04:32:49 AM
QuoteMan I was so pissed that you were leading those races on sunday (nothing personal man :D) cuz I would have been right there fighting with ya.


LOL  No offense taken! If the situation was reversed I'm sure I would feel the same way.  BTW..I still have never lead going into turns 1-5, I have just passed before the end of lap 1.  If I could launch a bike, I'd be dangerous!  (Not just a danger to the guys behind me!!  lol  ;D)
Title: Re: can the transponders be wrong
Post by: Frank_Angel on July 18, 2003, 04:50:56 AM
Quotea stop watch will not match a transponder time unless the transponder pickup and the reference point the person with the stopwatch is using are exactly the same.

Brian, hows that possible? If it takes n seconds for an object to complete a lap, that n is the same regardless of where the timing is started. Makes no difference. Two accurate timings from different reference points on the track for the same lap will yeild the same result (except for the first lap). If they didn't, then time travel is involved, and I think that's not allowed in the rule book. ;)

Manual timing will differ from transponders simply because it's manual and less likely to be accurate, i.e., you're relying on the hand-eye coordination of the timer, not an electronic device.
Title: Re: can the transponders be wrong
Post by: r6_philly on July 18, 2003, 10:35:05 AM
QuoteBrian, hows that possible? If it takes n seconds for an object to complete a lap, that n is the same regardless of where the timing is started. Makes no difference. Two accurate timings from different reference points on the track for the same lap will yeild the same result (except for the first lap). If they didn't, then time travel is involved, and I think that's not allowed in the rule book. ;)

Manual timing will differ from transponders simply because it's manual and less likely to be accurate, i.e., you're relying on the hand-eye coordination of the timer, not an electronic device.

Actually Frank, I spent a lot of time thinking about this, and it seems possible in the following scenario:

we have 3 time intervals, T1 T2 and T3. and the elec. timer starts before T1, and the hand timer starts before T3.

The rider did
T1- 20 sec. T2- 18 - T3- 22
T1- 21 sec T2- 19 T3 20
T1 - 22 T2 - 20 T3 - 18

Elec. Timer:
lap 1: 60sec
lap 2: 60 Sec
Lap 3: 60 sec

Hand timer:
Lap1: (partial, no read)
Lap2: 62 sec
Lap3: 62 Sec
Lap4:(Partial, no read)

So the electric timer would read average of 60 seconds per lap, and hand timer would read average of 62 seconds per lap.

We are not professionals, and difference in interval time does happen from lap to lap, especially in traffic, so the above scenario could and does happen some times.

The hand timer did not gain time, it was just happens that he/she did not get to measure the faster interval times,

And did that rider in above example go faster toward the end of the race? It seemed that he went faster in the last part of the track, but it hurted him in the front third, and that caused the timing discrepency.

Frank, it caught me initially with your reply, but the more you look into it, the more it make sense. It will acutally change how I feel about laptimes vs. performances. I will no longer trust time readings from a different area other than the front straight.
Title: Re: can the transponders be wrong
Post by: Decreasing_Dave on July 18, 2003, 10:56:00 AM
UHHH.....HUH...HUH....I'm confused Bevis

Dafan,

I have to agree with Frank.  A lap is a lap is a lap.  Unless we're talking about 2 different things.  

I'm talking about 1 timing point (as in transponders) for a full and complete lap.  If you're talking about multiple points, that could be our discrepency.  

But how are multiple timing points relevent to Transponders and this topic??

 8)
Title: Re: can the transponders be wrong
Post by: r6_philly on July 18, 2003, 11:04:33 AM
A lap is made up of different sections, turn 123 may be T1 turn  4 5 6 may be T2, and T3 7 8 9 may be T3.

When an instrument, or a person messures at turn 4, it is messuring T2 + T3 + T1

When an instrument is measuring at turn 1, it is doing T1 + T2 + T3

So based on the intervals I have given you, add up the intervals to get the lap time the particular instrument will get at different points of the track

T1 + T2 + T3 will yield 60 seconds for all 3 laps,
T2 + T3 + T1 will yeld 62 seconds for 2 laps, but the lap that is missing (no start or finish possible from turn 4) will add up to 56 seconds.

Interval matters because: you may have done 3 laps with the same lap time from your transponder, but you may have gone so fast in turn 7 8 9, it messed up your turn 1 2 3, as in the example.

Just add up the times, you will see the difference. The person did 3 laps for a total of 180 seconds, but depend on how you add up the intervals (where you take lap time) you will produce different lap times.
Title: Re: can the transponders be wrong
Post by: Thingy on July 18, 2003, 11:12:57 AM
What Brian is trying to say is that if the two timers are not starting the clock with the rider at the same point of the track, they will differ.

For example, let's say that one timer is located at the end of the straight and the other timer is located at the beginning of the straight. If a rider does a lap, the two timers will show a differnt lap time because the timers were only timing the rider at the same time for a portion of the track.  
Title: Re: can the transponders be wrong
Post by: ecumike on July 18, 2003, 11:33:20 AM
Yea, I agree with Frank, but Brian and Dafan Do have a point...

Let's make this easy... taking the beg'ng/end of the straight example as above..

Say I come around the last turn, onto the straight to start lap#3, WFO the whole time, past Elec. timer and past hand timer.

Now.. I come around onto the straight to start #4 WFO past elect. timer, but then get stuck behind a slow rider, BEFORE I get to hand timer, and say, in T1 apex (just after the hand timer) I pass him..... Now the elect timer has me fast, hand timer has me slower, b/c I slowed down between the 2 timers.

Apply this to any point between the 2 timers (whether on the straight, or T1 & T3, etc...) and you will have a difference.  IE:  What Brian and Dafan are saying

BUT!!!!... for Lap #4.. the ELEC timer will be slower now, b/c I slowed down after it, (as the start of it's lap #4, but before the start of the hand timer's lap #4)

So it evens out as far as average, but it that particular lap WAS your fastest, and you don't run any faster.. then yes, the hand timer will never show that fast lap.
Title: Re: can the transponders be wrong
Post by: Thingy on July 18, 2003, 02:30:15 PM
QuoteYea, I agree with Frank, but Brian and Dafan Do have a point...

Let's make this easy... taking the beg'ng/end of the straight example as above..

Say I come around the last turn, onto the straight to start lap#3, WFO the whole time, past Elec. timer and past hand timer.

Now.. I come around onto the straight to start #4 WFO past elect. timer, but then get stuck behind a slow rider, BEFORE I get to hand timer, and say, in T1 apex (just after the hand timer) I pass him..... Now the elect timer has me fast, hand timer has me slower, b/c I slowed down between the 2 timers.

Apply this to any point between the 2 timers (whether on the straight, or T1 & T3, etc...) and you will have a difference.  IE:  What Brian and Dafan are saying

BUT!!!!... for Lap #4.. the ELEC timer will be slower now, b/c I slowed down after it, (as the start of it's lap #4, but before the start of the hand timer's lap #4)

So it evens out as far as average, but it that particular lap WAS your fastest, and you don't run any faster.. then yes, the hand timer will never show that fast lap.


Yep.  Exactly. :D
Title: Re: can the transponders be wrong
Post by: THE_D.O.C. on July 19, 2003, 07:55:22 AM
you guys are crap. a lap is a lap is a lap. the only difference is that a human stopwatch is not as accurate as a lap timer.

if what you say is true, then just take all my fastest splits, and that will make my true qualifying time.  ::)


frank, don't teach a pig to sing.........

clowns.
Title: Re: can the transponders be wrong
Post by: Roach on July 19, 2003, 04:01:58 PM
Quoteyou guys are crap. a lap is a lap is a lap. the only difference is that a human stopwatch is not as accurate as a lap timer.

If my buddy is timing me in T8 at Summit and the beacon for the transponder is past start/finish, what happens if I let off the throttle after I go by my buddy? Or crash in T9? Or how about I pull into the pits?

Unless the person with the stopwatch and the transponder beacon are in the same location, you are looking at two different laps (that happen to have an overlapping section). One starts and finishes at the beacon, one starts and finishes at the stopwatch location. Unless you are so consistant that your speed/time doesn't ever vary in any given section of track at any time, the two won't agree.

- Roach
Title: Re: can the transponders be wrong
Post by: r6_philly on July 19, 2003, 07:28:14 PM
Quoteyou guys are crap. a lap is a lap is a lap. the only difference is that a human stopwatch is not as accurate as a lap timer.

if what you say is true, then just take all my fastest splits, and that will make my true qualifying time.  ::)


frank, don't teach a pig to sing.........

clowns.

dude it's an amazing accomplishment that you finally remembered most of the keys on the keyboard and their locations.

But then again I don't really expect you to give a reply that is not sparking anyways, it wouldn't be you... if you actually talk like anyone else has merit, then we got a really big problem.

You can get different lap times if you are timing at different points along the track. Simple as that. The total time a rider spent on the track would be contant, but based on the location (reference point) of the timer, the laps could break down differently therefore resulting in different lap times.
Title: Re: can the transponders be wrong
Post by: Roach on July 20, 2003, 12:55:01 AM

Trying to teach brad the concepts of relativity could be akin to talking to rock ... :D

The lap times are relative to the observer's location, be it a human with a stopwatch or a mechanical timer.

- Roach
Title: Re: can the transponders be wrong
Post by: THE_D.O.C. on July 20, 2003, 09:54:37 AM
you guys are incredibly funny, yet delusional at the same time. a transponder is perfect, the human eye/thumb is not.

but go ahead, "i'm faster in the turn three section so time me over there". ha ha ha ha

"mr mladin, why aren't you on the pole today?"

"well, the transponder is on the front straight, and i'm fast through turn five. therefore, my time is slower." ha ha ha ha ha


f&ckin' priceless. ha ha ha ha he he he ha ha ha ha.
Title: Re: can the transponders be wrong
Post by: Roach on July 20, 2003, 11:15:49 AM
Quotea transponder is perfect, the human eye/thumb is not.

Correct. But that's not what we're talking about currently. You made the incorrect statement that it doesn't matter at what point on the track you time a lap, it'll be the same as timing it from somewhere else. That's rather stupid.

Set up two transponders, one (transponder A) at start/finish, one in T8 (transponder B).

Make a mistake in T10 on lap 4, run off the edge of the track losing some time,  then continue to start/finish.

The lap that was run at full speed from T8 to T8 without error (recorded by transponder B, part of laps 3 and 4 relative to start/finish (race scoring))  will be X.

The lap run from start/finish to start/finish (recorded by transponder A, lap 4) will be SLOWER because you screwed up T10 before completing the lap RELATIVE TO START/FINISH.
 
The reverse will then also be true on the next recordings (provided another rider error isn't made). Transponder B will record a slower lap (T8 to T8, with a screwup in T10) and transponder A will get a full-speed lap (start-finish to start-finish with no errors)

How hard is that to grasp? Everything is relative to the observer's (timer's) location.

- Roach
Title: Re: can the transponders be wrong
Post by: Frank_Angel on July 20, 2003, 11:56:55 AM
QuoteActually Frank, I spent a lot of time thinking about this...

Dafan, you're right, but that's not what I meant. You are correct, but your example isn't timing the same lap. You're comparing lap charts, not laps. We do lap timings from different locations on the circuit all the time, all you need to do to get the lap charts back in synch is to net out the differences between the untimed portions. Rework your example and you'll see what I mean, the difference in lap times in your lap chart can be brought back to perfect alignment with some simple adjustment. That was my original point, i.e., that lap times for the same lap from accurate timings will be identical regardless of where they are taken.
Title: Re: can the transponders be wrong
Post by: bmfgsxr on July 20, 2003, 12:00:40 PM
QuoteCorrect. But that's not what we're talking about currently. You made the incorrect statement that it doesn't matter at what point on the track you time a lap, it'll be the same as timing it from somewhere else. That's rather stupid.

Set up two transponders, one (transponder A) at start/finish, one in T8 (transponder B).

Make a mistake in T10 on lap 4, run off the edge of the track losing some time,  then continue to start/finish.

The lap that was run at full speed from T8 to T8 without error (recorded by transponder B, part of laps 3 and 4 relative to start/finish (race scoring))  will be X.

The lap run from start/finish to start/finish (recorded by transponder A, lap 4) will be SLOWER because you screwed up T10 before completing the lap RELATIVE TO START/FINISH.
 
The reverse will then also be true on the next recordings (provided another rider error isn't made). Transponder B will record a slower lap (T8 to T8, with a screwup in T10) and transponder A will get a full-speed lap (start-finish to start-finish with no errors)

How hard is that to grasp? Everything is relative to the observer's (timer's) location.

- Roach


boy oh boy has this become something. sure, potentially you could run different lap times with two beacons set up. but regardless of anything, if you are timing 8 laps of a race from one point your lap times should just about mimic the times the transponders will record on the front straight. if your only going to time one lap from turn 8, and compare it to one lap run from start/finish to start finish there is a possibility that the times could be different. but that is not the original question i asked. 8)
Title: Re: can the transponders be wrong
Post by: THE_D.O.C. on July 20, 2003, 08:13:37 PM
i'm still curious why roach needs two transponders for a precise lap? one suffices everywhere but in roachville. who cares if you boffed turn ten? why on earth should it matter? why the whole talk is off topic for this thread. the fact is, transponders don't lie. racers do.
Title: Re: can the transponders be wrong
Post by: bweber on July 21, 2003, 06:27:07 AM
Why even use a transponder or stopwatch if you just want your AVERAGE lap time.  If that is the case, take the amount of time that elapses between the green flag dropping and the the time you pass the checkered flag waving and divide it by the number of laps you ran.  That is your average lap time, but who looks at average lap times? What good is the average lap time?  
I just wanted to point out how a stopwatch (with a good operator) and a transponder could disagree on something like best lap time during a race.  Someone may come in and look at the time sheet one of their pit crew made, or even check an on board lap timer and see they ran a best lap of 1:14:39 at Blackhawk during race.  Then they may get the official print out showing the transponder times and be disappointed when the transponder records their best lap at 1:14:8.  
It has been explained and it is a simple concept.
Title: Re: can the transponders be wrong
Post by: r6_philly on July 21, 2003, 07:21:59 AM
QuoteDafan, you're right, but that's not what I meant. You are correct, but your example isn't timing the same lap. You're comparing lap charts, not laps. We do lap timings from different locations on the circuit all the time, all you need to do to get the lap charts back in synch is to net out the differences between the untimed portions. Rework your example and you'll see what I mean, the difference in lap times in your lap chart can be brought back to perfect alignment with some simple adjustment. That was my original point, i.e., that lap times for the same lap from accurate timings will be identical regardless of where they are taken.

First of all, I am not splitting hair :D

I wasn't talking about lap charts from different location of the track. I merely broke down the track into 3 sections to illustrate why 2 readings can occur.

Simply consider this: a vehicle is accelerating along a track at a CONSTANT rate of acceleration. If you measure between any 2 points of equal distance, lets say 1/4 mile, you will yield different results because the difference in average velocity based on the point in time of the run. So if you consider that over a variable acceleration (such as a human racer) it would dictate that an constant average of volocity will not be able to be achieved. So based on the variance of the average velocity, you will yield a different lap time reading, even though you are timing the same distance lap after lap, from 2 different points. 2 seconds a lap would be a lot to achieve as a different, but there will be difference.

Of course the over all elapsed time would be the same in both cases, but distance is only one factor here, and the same distance would not yield The same time.

Ok I am pretty convinced of my view here, please help me figure out that I am wrong if I am. Or I think I over paid for that engineering stuff :D

Title: Re: can the transponders be wrong
Post by: G 97 on July 21, 2003, 09:14:34 AM
QuoteIf my buddy is timing me in T8 at Summit and the beacon for the transponder is past start/finish, what happens if I let off the throttle after I go by my buddy? Or crash in T9? Or how about I pull into the pits?

Unless the person with the stopwatch and the transponder beacon are in the same location, you are looking at two different laps (that happen to have an overlapping section). One starts and finishes at the beacon, one starts and finishes at the stopwatch location. Unless you are so consistant that your speed/time doesn't ever vary in any given section of track at any time, the two won't agree.

- Roach

A lap is nothing more than a circle.  It does not matter where you start or finish.  As long as you complete the circle.  The only lap times that would vary greatly are when starting and ending.  Other than that it does not matter where the transponder is positioned or the stop watch.  The lap times will be extremely close.  You can time from anywhere, it does not matter.  A lap is a lap.  Rather simple.  
Time from T-1 or T-8,  Your times will be the same.
Title: Re: can the transponders be wrong
Post by: Nate R on July 21, 2003, 09:23:00 AM
But if you have 2 diff locations, the same lap is impossible. You will have to complete more than a lap to make both see a lap, and thus the time could vary greatly.

Let's say transponder A and B are both on the front straight of a track.

You pass transponder A after completing a lap around from that point. Then stop, and then roll past transponder B which is 1000' later. Transponder B will have a MUCH longer lap time than transponder A. Both are recording one lap from the point of the respective transponders. Think about it, you can have differences.

Now, where do you want to do this experiment? Will my $1000 be in cash, check, or Cashier's check?  ;)
Title: Re: can the transponders be wrong
Post by: G 97 on July 21, 2003, 09:27:30 AM
QuoteBut if you have 2 diff locations, the same lap is impossible. You will have to complete more than a lap to make both see a lap, and thus the time could vary greatly.

Let's say transponder A and B are both on the front straight of a track.

You pass transponder A after completing a lap around from that point. Then stop, and then roll past transponder B which is 1000' later. Transponder B will have a MUCH longer lap time than transponder A. Both are recording one lap from the point of the respective transponders. Think about it, you can have differences.

Now, where do you want to do this experiment? Will my $1000 be in cash, check, or Cashier's check?  ;)

Yeah, I understand that.  If you intentionally go out and stop or slow after hitting a transponder etc.   ::)
Everyone know the first lap is crap anyway. ;)

The point is, a lap is still a lap.  Over the course of multiple laps it does not matter from where the location the lap was timed from.  


Title: Re: can the transponders be wrong
Post by: TZDeSioux on July 21, 2003, 09:27:51 AM
This argument is gay and annoying.
Title: Re: can the transponders be wrong
Post by: bweber on July 21, 2003, 01:15:47 PM
QuoteThis argument is gay and annoying.
SuperDuck, I know the stuff you post is of the highest importance, like eating cheetos, who's going to BHF and how many times you've crashed this year.  I checked your post history.  It is really important and insightful stuff.
Nice comment.
Title: Re: can the transponders be wrong
Post by: MudDawg on July 21, 2003, 02:04:52 PM
QuoteYeah, I understand that.  If you intentionally go out and stop or slow after hitting a transponder etc.   ::)
Everyone know the first lap is crap anyway. ;)

The point is, a lap is still a lap.  Over the course of multiple laps it does not matter from where the location the lap was timed from.  


So with that in mind EVERY lap you run is exactly identical?  man...you must be good.  Dunno about you but I fluctuate in laptimes....some are good laps some are bad.  Sometimes it's traffic, sometimes I overcook braking into a turn.  I guess you don't......ever.

And Duck is right.  This is annoying.
Title: Re: can the transponders be wrong
Post by: TZDeSioux on July 21, 2003, 02:05:25 PM
QuoteSuperDuck, I know the stuff you post is of the highest importance, like eating cheetos, who's going to BHF and how many times you've crashed this year.  I checked your post history.  It is really important and insightful stuff.
Nice comment.

I try not to be insightful but the point was that the same thing is being said over and over and over and over with a few hypothetical situations thrown in here and there and then the same point over and over and over again.  
Title: Re: can the transponders be wrong
Post by: THE_D.O.C. on July 21, 2003, 02:12:08 PM
geeee... i say this thread is silly, and i'm a spoop. mr. duck is right.

i gotta do it again.

"hey, could you go stand in turn five and time me? my lap times are faster from there."

HA HA HA HA HA HA HA HA HA HA HA HA!!!!!!!!
Title: Re: can the transponders be wrong
Post by: G 97 on July 21, 2003, 02:38:24 PM
Quotegeeee... i say this thread is silly, and i'm a spoop. mr. duck is right.

i gotta do it again.

"hey, could you go stand in turn five and time me? my lap times are faster from there."

HA HA HA HA HA HA HA HA HA HA HA HA!!!!!!!!

Brad, you are so full of crap.  Everyone knows that the fastes times are when you are timed in turn 3.  ;D
Title: Re: can the transponders be wrong
Post by: G 97 on July 21, 2003, 02:44:03 PM
QuoteSo with that in mind EVERY lap you run is exactly identical?  man...you must be good.  Dunno about you but I fluctuate in laptimes....some are good laps some are bad.  Sometimes it's traffic, sometimes I overcook braking into a turn.  I guess you don't......ever.

And Duck is right.  This is annoying.

Are you retarded or just playing one?  Show me where I said the times would be identical?  Your comprehension of this topic is under whelming.  And yes, it is not uncommen for me to run identical lap times lap after lap with in .0X But that is not the point.  Keep up the good work though.  ::)
Title: Re: can the transponders be wrong
Post by: THE_D.O.C. on July 21, 2003, 07:52:34 PM
QuoteBrad, you are so full of crap.  Everyone knows that the fastes times are when you are timed in turn 3.  ;D

maybe for YOUR timed lap. but mine is DEFINITELY FASTER TAKEN FROM TURN FIVE.  ;D
Title: Re: can the transponders be wrong
Post by: MudDawg on July 22, 2003, 07:59:35 AM
QuoteAre you retarded or just playing one?  Show me where I said the times would be identical?  Your comprehension of this topic is under whelming.  And yes, it is not uncommen for me to run identical lap times lap after lap with in .0X But that is not the point.  Keep up the good work though.  ::)

I only play a retard at work.  Obviously you take yours home with you.   :D

So you basically said that YES...you do run identical lap times....well...except when they are slightly different.  Uh huh.  

So what exactly is the point?  That laptimes can vary when the laptime is take at different points?  Well gee ... that's a no brainer.  You are basically running the same course but a different lap.  Unless of course you do every turn at the exact same speed without variation.  I know I certainly don't.  But hey....not like I can ride worth a damn anyway.