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NHRA (John Force Team) using some type of durometer at the track?

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NHRA (John Force Team) using some type of durometer at the track?

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Old 06-30-2011, 11:57 AM
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Uncle Meat
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Default NHRA (John Force Team) using some type of durometer at the track?

So just prior to any Team Force car running at the Summit Nationals this past weekend one of the crew members would walk out onto the starting line with this funky piece of equipment. None of the other teams were using one of these either...

It was "L" shaped with a couple of wings on the bottom you would stand on to hold the tool down tight or flat against the track surface and I believe a reading is taken via a dial gauge. The device was then picked up and "wound" once or twice via the handle on top. Then placed in a different location and another reading taken. Never seen this before... anyone know for sure what's being measured here? It's not track temperature because they had handheld digital infrared devices they were using for that. I'm thinking it either measured the hardness, thickness, or the stickyness of the track. What do you guys think?

U.M.

Sets device on track while taking a temp reading.




Stands on device.


Takes a reading (I assume).


Picks it up and cranks the top handle around once or twice.


Sets it down and starts all over again.



So what ya think they are measuring?
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Old 06-30-2011, 12:07 PM
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AzMotorhead
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My guess.. Adhesion test
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Old 06-30-2011, 12:13 PM
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Originally Posted by AzMotorhead View Post
My guess.. Adhesion test
That way they can pick the correct hair spray for their tires; extra hold or maximum hold.
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Old 06-30-2011, 12:13 PM
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I believe those have been around for a while now... tests the "grippiness" of the track and provides a number to include with the other data for the run.
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Old 06-30-2011, 03:06 PM
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Old 06-30-2011, 03:16 PM
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Originally Posted by CurtP View Post
“We have a given amount of area of rubber (on the Track-Meter) and this rubber is very similar to a slick on a Top Fuel Car. We then have a given amount of pressure we apply to the rubber by a mechanism within the meter. Then we have a (inch pounds) torque arm built into the meter that is part of the measurement process. The entire shaft that the meter is bolted to is surrounded by ball bearings so their isn’t any parasitic drag that would influence the reading. You then press on the outer portion of the device, compressing the internal spring that presses the pad firmly and evenly to the ground. Then the torque wrench measures the break away torque, in which the point of the pad looses traction with the racing surface”
so simple a caveman (see above photos) can use it.
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Old 06-30-2011, 03:49 PM
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Core sample to see how thick the rubber is?
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Old 06-30-2011, 03:53 PM
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checking for gription
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Old 06-30-2011, 03:54 PM
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I still say if they got the motor moving on a sliding sled system, before the green light, it would get the momentum going quicker.....not sure if the added weight could be compensated for........course this also may be the dumbest idea of all time too I don't know.

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Old 06-30-2011, 04:24 PM
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Why test the drip zone?
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Old 06-30-2011, 04:46 PM
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so it's a stickyometer? I could use one of those!
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Old 06-30-2011, 04:50 PM
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Originally Posted by CurtP View Post
That would be it! Thanks.

Originally Posted by Torqaholic View Post
Why test the drip zone?
Actually he's testing right in the middle of where the right side tire of the last car made its mark. You'd think the darker area would be the tire contact patch when actually it's the shiny area.

U.M.
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