G-Tech meter

[orin at WOLFENET.com]

> me three .... didn't I see such on Bowling's page or
> somewhere's ???  torque/hp vs weight & accel ???

Power is easy enough - mass * velocity * acceleration gives the
instantaneous power.  There would be a scaling constant to convert to hp,
depending on what units you used.

Acceleration is read from the accelerometer.  You input mass (got to
weigh your car for this or estimate from the GVW stickers) and the
computer calculates velocity by integrating acceleration over time,
at its simplest, v = previous v + acceleration * time interval.
I'd probably take the average of the current acceleration and previous
acceleration reading in calculating v.  As an improvement, it might
be worthwhile to fit a curve to the acceleration values, though for
a small enough time interval, it probably wouldn't matter.

Orin.