That is more than enough rpm change to hear (depending on the accuracy of
the hearer : ) so something is screwy. Which reading do you think
is the "real" one, 4200 or 4700? Electrical noise (the bane of the
composite aircraft builder) is a possibility.
----- Original Message -----
Sent: Monday, January 23, 2006 8:18
AM
Subject: [FlyRotary] Variable
RPM?
Tracy,
This discussion leads me to a
question.
My rpm reading seems accurate most
of the time, but varies a lot during a run-up.
For example, if I bring the rpm to
4700 rpm the rpm reading will remain steady for a few
seconds, then drop to around 4200, then bounce around between 4700 and 4200
without any movement of the throttle or change in engine sound.
Any
thoughts?
John