In a message dated 3/25/02 7:13:21 PM Central Standard Time, bthatch@juno.com
writes:
<< * The rest of the runs showed 67 seconds of a 61 to 64 second run. The
maps really weren't representative of the course but the graphs seemed to
show the lateral and acceleration Gs correctly. The summary and
performance data were way off and my speed was showing up at 160+ mph
several places on course (this was a Solo II course and I never got out
of second gear in my Corvette). >>
The first thing you need to do is trim the start and finnish off of the data.
I just chop off everything before the big acceleration spike. And also chop
the end, from where the final braking starts, that is after the finish line,
right?
<< I need some help in fine-tuning my unit to be more accurate. Any help
will be appreciated. >>
Once you have the start and end trimmed, the next one is the end speed. This
will compensate for a steady increasing speed, which may be a huge chunk of
your problem. The other thing that will make very high speeds is if you
oversteer alot. Hanging the tail out looks just like acceleration to the
cube. If you are consistent with your tail wagging, just setting the end
speed down should get the map close enough to use. But if you pushed on some
of the course, but then had a big tail out slide in one corner, then you need
to trim just that one section. When
I do that in my car, I don't bother totally fixing the map, it is easy to see
that you didn't really shoot from 50 to 90 mph in the turn where you know you
had the tail way out.
Gary M.
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