Dumb track (1/4 mile) question

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Jul 16, 2001 | 11:56 AM

ejj

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Okay, so I figure there are sensors in the track for the timing, but what device is used to measure your mph? Some kind of photo gate?

Jul 16, 2001 | 12:10 PM

Sprint

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Quote:

Originally posted by ejj5875
Okay, so I figure there are sensors in the track for the timing, but what device is used to measure your mph? Some kind of photo gate?

same thing the cops use RADAR

Jul 16, 2001 | 12:14 PM

ejj

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Quote:

Originally posted by SprintMax

same thing the cops use RADAR

That's why I asked. Would that set off my (or others) radar detectors? Is it just really weak radar?

Jul 16, 2001 | 12:33 PM

Sprint

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not sure... i usally turn all my electronics off

Jul 16, 2001 | 12:41 PM

ejj

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Quote:

Originally posted by SprintMax
not sure... i usally turn all my electronics off

Well, my radar detector's hard wired, and always on when the car is, so I would have noticed if it went off at the track. It doesn't. That leads me to belive that they use something other than radar.

Jul 16, 2001 | 12:47 PM

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well thats strange because i figure whatever device they are using has to shoot or do something to your car.. thus evoking some trip to the Radar detector.. hmmm... i dunno

Jul 16, 2001 | 12:55 PM

Sprint

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well thats strange because i figure whatever device they are using has to shoot or do something to your car.. thus evoking some trip to the Radar detector.. hmmm... i dunno

Jul 16, 2001 | 01:05 PM

Sonic

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I always thought that it was a series of light sensors. And AFAIK, the last two sensors spaced at 60' before and at the 1/4 mile line could be used to figure your trap speed.

Jul 16, 2001 | 02:01 PM

mzmtg

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Quote:

Originally posted by medicsonic
I always thought that it was a series of light sensors. And AFAIK, the last two sensors spaced at 60' before and at the 1/4 mile line could be used to figure your trap speed.

This is correct. There is a set of lights that measures your average speed across the last 60' feet of the track.