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G-TECH / Pro Competition User Guide, Release 3.1
147
Drag Strip Concepts
Note:
For a more information on drag race terminology and
concepts, please visit our drag racing info page at:
http://www.gtechpro.com/dragstrip.html
This web page explains concepts such as “reaction time,” “roll-
out,” “full tree,” and “pro tree.”
At a dragstrip, there is a small region which contains two
beams that determine where your front tires are. The first
beam your vehicle encounters is called the “Pre-Stage Beam”,
and the second beam is called the “Stage Beam”.
When you first move your vehicle into the starting line
region, the “Pre Stage” bulb on the track’s Christmas tree illu-
minates to tell you that your front tires have blocked the Pre-
Stage Beam and are close to the Stage Beam.
When you roll forward a bit more (usually about 6-8 inches),
a second bulb, called the “Staging Bulb”, comes on. This indi-
cates your front tires have blocked the Stage Beam. At this
point, your vehicle is “staged”, and ready for a legal start.
You can typically continue to inch your vehicle forward about
one foot (depending on your tire diameter) and the Stage
Bulb will remain on.
As you inch forward, eventually the Pre Stage Bulb will turn
off. This is OK, since the Pre Stage Bulb has nothing to do
with the starting line, and is simply provided as a courtesy.
If you roll your vehicle too far forward, the Staging Bulb will
go out, indicating your front tires are no longer blocking the
Stage Beam, and you must back up your vehicle and re-stage
before the run can begin. The Christmas Tree will not begin
the countdown until your vehicle (and the vehicle next to
you) is staged.
As long as the Staging Bulb is illuminated, i.e., as long as any
part of your front tire is blocking the Stage Beam, you are
“staged” for a legal start.
If you stop inching your vehicle forward immediately after the
Staging Bulb comes on, you have “shallow staged” (i.e., you
have barely entered the staging area). This will generally give
you a longer reaction time but a faster E.T. and trap speed,
because the vehicle has more of a “running start” before the
E.T. clock starts.
Summary of Contents for Pro Competition
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Page 17: ...16 G TECH Pro Competition User Guide Release 3 1...
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