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External
Since: Feb 03, 2005
Posts: 61
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(Msg. 1) Posted: Mon May 12, 2008 10:12 pm
Post subject: Reaction Time  Get Alert
Archived from groups: alt>autos>sport>nhra (more info?)
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I was wondering, where did NHRA come up with the 0.4 second reaction time
(RT) they use? I always assumed it was based on reaction from the eyes to
hands/feet...but the bikes have the fastest RT while the TF cars have the
slowest. Therefore the 0.4 sec. RT isn't based on driver/vehicle
interaction, correct?
This leads to my next question, does the NHRA ever review the reaction time
interval and have they ever changed it?
BTW- a search on NHRA.com had 965 articles (most on current eliminations) so
I thought I would ask here.
TIA.
--
Scall5 |
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External
Since: May 04, 2007
Posts: 11
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(Msg. 2) Posted: Mon May 12, 2008 11:32 pm
Post subject: Re: Reaction Time Get Alert [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On May 12, 10:12 pm, "Scall5" <Sca....TakeThisOut@nospam.com> wrote:
> I was wondering, where did NHRA come up with the 0.4 second reaction time
> (RT) they use? I always assumed it was based on reaction from the eyes to
> hands/feet...but the bikes have the fastest RT while the TF cars have the
> slowest. Therefore the 0.4 sec. RT isn't based on driver/vehicle
> interaction, correct?
>
> This leads to my next question, does the NHRA ever review the reaction time
> interval and have they ever changed it?
>
> BTW- a search on NHRA.com had 965 articles (most on current eliminations) so
> I thought I would ask here.
>
> TIA.
> --
> Scall5
The bikes have a quicker reaction time because the bikes are
shorter. The long TF cars have a longer reaction time because the
longer time it takes the drive wheels to move the front of the car.
Okay, just kidding on that one.
Yep, clutch setups and the fact the bikes are so much lighter than a
TF car helps a bunch.. The perfect RT is a .000, but the time between
yellow and green is still .400 however. Just changed the way they
post it. |
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External
Since: May 13, 2008
Posts: 1
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(Msg. 3) Posted: Tue May 13, 2008 1:38 am
Post subject: Re: Reaction Time Get Alert [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In article <4p6dnVnMhoO4mrTVnZ2dnUVZ_rjinZ2d.TakeThisOut@insightbb.com>, Scall5
@nospam.com says...
> I was wondering, where did NHRA come up with the 0.4 second reaction time
> (RT) they use? I always assumed it was based on reaction from the eyes to
> hands/feet...but the bikes have the fastest RT while the TF cars have the
> slowest. Therefore the 0.4 sec. RT isn't based on driver/vehicle
> interaction, correct?
>
> This leads to my next question, does the NHRA ever review the reaction time
> interval and have they ever changed it?
>
> BTW- a search on NHRA.com had 965 articles (most on current eliminations) so
> I thought I would ask here.
>
> TIA.
>
Umm, they changed the reaction time several years ago. A perfect light
is now .000 seconds. The reason the TF and FC's are "slow" on reaction
time is because of the clutch setups on the cars, it takes a certain
amount of time to start the car moving.
--
BDK
NJJC#1 >> Stay informed about: Reaction Time |
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External
Since: Nov 08, 2007
Posts: 6
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(Msg. 4) Posted: Tue May 13, 2008 9:01 am
Post subject: Re: Reaction Time Get Alert [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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All Sportsman classes are .500 (I believe the Super Classes are .500 Pro
Tree)
All Pro Car Classes are .400 Pro Tree
Pro MotorCycles (I believe (after Angelle Bitched)) are .300 Pro Tree...
Please correct me if I'm not correct here... bob
"Silicon Sam" <SiliconSam DeleteThis @gmail.com> wrote in message
news:f98fbdf0-8ad5-41d4-811f-8fb95e15de38@q27g2000prf.googlegroups.com...
> On May 12, 10:12 pm, "Scall5" <Sca... DeleteThis @nospam.com> wrote:
>> I was wondering, where did NHRA come up with the 0.4 second reaction time
>> (RT) they use? I always assumed it was based on reaction from the eyes
>> to
>> hands/feet...but the bikes have the fastest RT while the TF cars have the
>> slowest. Therefore the 0.4 sec. RT isn't based on driver/vehicle
>> interaction, correct?
>>
>> This leads to my next question, does the NHRA ever review the reaction
>> time
>> interval and have they ever changed it?
>>
>> BTW- a search on NHRA.com had 965 articles (most on current eliminations)
>> so
>> I thought I would ask here.
>>
>> TIA.
>> --
>> Scall5
>
> The bikes have a quicker reaction time because the bikes are
> shorter. The long TF cars have a longer reaction time because the
> longer time it takes the drive wheels to move the front of the car.
>
> Okay, just kidding on that one.
>
> Yep, clutch setups and the fact the bikes are so much lighter than a
> TF car helps a bunch.. The perfect RT is a .000, but the time between
> yellow and green is still .400 however. Just changed the way they
> post it. >> Stay informed about: Reaction Time |
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External
Since: Dec 21, 2007
Posts: 6
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(Msg. 5) Posted: Tue May 13, 2008 10:25 am
Post subject: Re: Reaction Time Get Alert [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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The reaction time is actually the time it takes for the front wheels to move
out of the staged beam, measured AFTER the last amber light goes on. ON a
Pro tree, the length of time between the last amber and the green is .400
sec. It may be a bit less than that for the PSBs.
"Scall5" <Scall5 RemoveThis @nospam.com> wrote in message
news:4p6dnVnMhoO4mrTVnZ2dnUVZ_rjinZ2d@insightbb.com...
>I was wondering, where did NHRA come up with the 0.4 second reaction time
>(RT) they use? I always assumed it was based on reaction from the eyes to
>hands/feet...but the bikes have the fastest RT while the TF cars have the
>slowest. Therefore the 0.4 sec. RT isn't based on driver/vehicle
>interaction, correct?
>
> This leads to my next question, does the NHRA ever review the reaction
> time interval and have they ever changed it?
>
> BTW- a search on NHRA.com had 965 articles (most on current eliminations)
> so I thought I would ask here.
>
> TIA.
> --
> Scall5 >> Stay informed about: Reaction Time |
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External
Since: Feb 03, 2005
Posts: 61
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(Msg. 6) Posted: Tue May 13, 2008 8:58 pm
Post subject: Re: Reaction Time Get Alert [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Silicon Sam" <SiliconSam DeleteThis @gmail.com> wrote in message
news:f98fbdf0-8ad5-41d4-811f-8fb95e15de38@q27g2000prf.googlegroups.com...
> On May 12, 10:12 pm, "Scall5" <Sca... DeleteThis @nospam.com> wrote:
>> I was wondering, where did NHRA come up with the 0.4 second reaction time
>> (RT) they use? I always assumed it was based on reaction from the eyes
>> to
>> hands/feet...but the bikes have the fastest RT while the TF cars have the
>> slowest. Therefore the 0.4 sec. RT isn't based on driver/vehicle
>> interaction, correct?
>>
>> This leads to my next question, does the NHRA ever review the reaction
>> time
>> interval and have they ever changed it?
>>
>> BTW- a search on NHRA.com had 965 articles (most on current eliminations)
>> so
>> I thought I would ask here.
>>
>> TIA.
>> --
>> Scall5
>
> The bikes have a quicker reaction time because the bikes are
> shorter. The long TF cars have a longer reaction time because the
> longer time it takes the drive wheels to move the front of the car.
>
> Okay, just kidding on that one.
>
> Yep, clutch setups and the fact the bikes are so much lighter than a
> TF car helps a bunch.. The perfect RT is a .000, but the time between
> yellow and green is still .400 however. Just changed the way they
> post it.
I should have written my post better...I assume that the drivers hit the
throttle as soon as they see the three amber lights. So, why did the NHRA
decide on .400 for the nitro classes than say .300? Did they do time
studies?
TIA.
--
Scall5 >> Stay informed about: Reaction Time |
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External
Since: May 14, 2008
Posts: 2
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(Msg. 7) Posted: Wed May 14, 2008 5:27 pm
Post subject: Re: Reaction Time Get Alert [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Stock, Super Stock, Comp. El. are on a .500 full tree.
Super classes are on .400 pro tree.
Pro M/C, Pro Stock, Nitro cars and Alky cars are also on a .400 pro tree.
Jerry
Robert A. VanAntwerp wrote:
> All Sportsman classes are .500 (I believe the Super Classes are .500 Pro
> Tree)
> All Pro Car Classes are .400 Pro Tree
> Pro MotorCycles (I believe (after Angelle Bitched)) are .300 Pro Tree...
> Please correct me if I'm not correct here... bob
>
> "Silicon Sam" <SiliconSam DeleteThis @gmail.com> wrote in message
> news:f98fbdf0-8ad5-41d4-811f-8fb95e15de38@q27g2000prf.googlegroups.com...
>
>>On May 12, 10:12 pm, "Scall5" <Sca... DeleteThis @nospam.com> wrote:
>>
>>>I was wondering, where did NHRA come up with the 0.4 second reaction time
>>>(RT) they use? I always assumed it was based on reaction from the eyes
>>>to
>>>hands/feet...but the bikes have the fastest RT while the TF cars have the
>>>slowest. Therefore the 0.4 sec. RT isn't based on driver/vehicle
>>>interaction, correct?
>>>
>>>This leads to my next question, does the NHRA ever review the reaction
>>>time
>>>interval and have they ever changed it?
>>>
>>>BTW- a search on NHRA.com had 965 articles (most on current eliminations)
>>>so
>>>I thought I would ask here.
>>>
>>>TIA.
>>>--
>>>Scall5
>>
>> The bikes have a quicker reaction time because the bikes are
>>shorter. The long TF cars have a longer reaction time because the
>>longer time it takes the drive wheels to move the front of the car.
>>
>> Okay, just kidding on that one.
>>
>> Yep, clutch setups and the fact the bikes are so much lighter than a
>>TF car helps a bunch.. The perfect RT is a .000, but the time between
>>yellow and green is still .400 however. Just changed the way they
>>post it.
>
>
> >> Stay informed about: Reaction Time |
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External
Since: May 14, 2008
Posts: 2
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(Msg. 8) Posted: Wed May 14, 2008 5:32 pm
Post subject: Re: Reaction Time Get Alert [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I'm not sure how they actually came up with it, but the average drivers
reaction time is around .200 and most cars will react about the same.
But with trans brakes and all the other developments in tires,
suspension etc. the cars will react much quicker, hence the delay box.
I remember back in the 70's a track i raced at, the time from yellow to
green was .2. It was very difficult to red light unless you went in
deep and guessed.
Jerry
Scall5 wrote:
>
> "Silicon Sam" <SiliconSam.TakeThisOut@gmail.com> wrote in message
> news:f98fbdf0-8ad5-41d4-811f-8fb95e15de38@q27g2000prf.googlegroups.com...
>
>> On May 12, 10:12 pm, "Scall5" <Sca....TakeThisOut@nospam.com> wrote:
>>
>>> I was wondering, where did NHRA come up with the 0.4 second reaction
>>> time
>>> (RT) they use? I always assumed it was based on reaction from the
>>> eyes to
>>> hands/feet...but the bikes have the fastest RT while the TF cars have
>>> the
>>> slowest. Therefore the 0.4 sec. RT isn't based on driver/vehicle
>>> interaction, correct?
>>>
>>> This leads to my next question, does the NHRA ever review the
>>> reaction time
>>> interval and have they ever changed it?
>>>
>>> BTW- a search on NHRA.com had 965 articles (most on current
>>> eliminations) so
>>> I thought I would ask here.
>>>
>>> TIA.
>>> --
>>> Scall5
>>
>>
>> The bikes have a quicker reaction time because the bikes are
>> shorter. The long TF cars have a longer reaction time because the
>> longer time it takes the drive wheels to move the front of the car.
>>
>> Okay, just kidding on that one.
>>
>> Yep, clutch setups and the fact the bikes are so much lighter than a
>> TF car helps a bunch.. The perfect RT is a .000, but the time between
>> yellow and green is still .400 however. Just changed the way they
>> post it.
>
>
> I should have written my post better...I assume that the drivers hit the
> throttle as soon as they see the three amber lights. So, why did the
> NHRA decide on .400 for the nitro classes than say .300? Did they do
> time studies?
>
> TIA. >> Stay informed about: Reaction Time |
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