Acceleration / GTech

[Carter Shore]

Are you certain what the actual axis of the sensor is?
If your times are reading slow, then maybe that's what
is already happenning?

Put some tape on the case, and draw what should be the
axis on the tape. Use a protractor to keep track of
the measured angle, and then try to calibrate versus
the actual angle.
You will need to do this in two planes, horizontal and
vertical, to find the real axis.

--- Barry Tisdale <btisdale at cybersol.com> wrote:
> What's been your (anybody's) experience w/ GTech as
> far as accuracy
> compared to timed 1/4 mi runs?  Mine turned out to
> be reading high (fast)
> by 0.6 in the 1/4.  First time I ran @ the track, I
> was a bit disappointed;
> 13.8sec vs 13.2sec...(:{E
> 
> My thoughts on correction - no response to email
> from the folks @ GTech, BTW.
> 
> Would it work to compensate for 'fast' times by
> offsetting the centerline
> of the GTech from the centerline of the car (offset
> it on the yaw axis
> only)?  These things read acceleration in one plane
> only, so it would seen
> that offsetting from the midline would decrease the
> acceleration the GTech
> sees.  The Gtech reads fast by 96% of actual time;
> SIN of 75° is 0.96 -
> would offsetting the midlines by 15° correct for the
> error?  Here
> (Michigan) the tracks are closed, so can't check it
> till next year.
> 
> What do you think?
> 
> Thanks - Barry - Sy#26
> 


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