RE: Calibrating Engine RPM

[Duncan McFadyean <HalcrowMRO@compuserve.com>]

Using a video camera to check tacho. accuracy is supposed to work very
well. This is on the basis that the shutter speed in a video camera is
timed at 1/500 sec. and is accurately crystal controlled to enable the
tapes to playback on video machines.
Certainly, having tried it, good results can be achieved, but I can`t
comment on the accuracy of the camera shutter speed and whether the result
is really as good as it would seem.

Duncan McFadyean