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Old 08-15-2010, 10:55 PM   #1
417strokerdart
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Default Max height at finish beams?

Does anyone know what the maximum height is that will still trip the finish line beams? I hate guys that have to play games like.....guess what is tripping the beams on my car? Anyone know this?
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Old 08-16-2010, 07:24 AM   #2
Seamister
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Post Re: Max height at finish beams?

STANDARD TIMING EQUIPMENT MEASUREMENTS

The following dimensions are guidelines in timing equipment placement.
CHRISTMAS TREE

Distance from start line to tree: 40 to 42-feet.
Height of tree: 94-inches from ground to center of pre-stage bulb.

LIGHT BEAM PLACEMENT

Distance between pre-stage and stage: 7-inches.
Distance between stage and guard beam: 16-inches.
Height of 60-foot beam: 10-inches.
Height of interval time beams, speed trap beams, and ET stop beam - all 5-inches.
All interval increments and quarter-mile finish lines are measured from the guard beam.

ROLLOUT

Height of beam approximately 1 9/16 adjusted as necessary (and possible) to provide 11 to 12-inches of roll using standard dragster wheel/tire (22-inch diameter). Beam height must be low enough to accommodate 3-inch clearance rule as per NHRA Rulebook.
NOTE: An 11-inch rollout equal on both lanes may not be possible due to track crown. The single most important thing with rollout is that both lanes be as equal as possible


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Old 08-16-2010, 08:44 AM   #3
417strokerdart
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Default Re: Max height at finish beams?

Thanks, exactly what I needed.
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Old 08-16-2010, 09:01 AM   #4
dennysavage
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Default Re: Max height at finish beams?

Go to different tracks and take a tape measure with you... Do some measuring... There are + and - variations..... Trust me.. Enough in some areas, to make considerable differences..
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Old 08-19-2010, 12:50 AM   #5
nx338
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Default Re: Max height at finish beams?

Quote:
Originally Posted by Seamister View Post
STANDARD TIMING EQUIPMENT MEASUREMENTS

The following dimensions are guidelines in timing equipment placement.

LIGHT BEAM PLACEMENT

Distance between stage and guard beam: 16-inches.
All interval increments and quarter-mile finish lines are measured from the guard beam.



Steve
Does this mean we are actually supposed to race 1321' and 4"s?

I wonder if all tracks actually are setup this way? It may explain why some tracks seem faster or slower than others.
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Old 08-19-2010, 09:06 AM   #6
Ken Schertz
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Default Re: Max height at finish beams?

Left lane at National Trail used to be a little high. I could trip that beam with the nose of my car, added almost 3 MPH.
Doesn't do much for ET though.
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