[rec.autos.tech] measuring vehicle speed

gt0297a@prism.gatech.EDU (Tim Drury) (06/17/91)

is there an accurate, *cheap* method of measuring vehicle speed without
measuring off the front or rear wheels?  this is to be used in a proto-
type traction control system on a race car.  the speed of the rear
wheels will be compared with the true vehicle speed to determine if
traction is lost.  since the front wheels will rotate at differing speeds
in turns they can't be used.
is there an easy way to use infrared doppler or something like it?

-tim drury