Speaking of calibration I have been meaning to ask a burning question about Tru Trak a/p.  mine is confused about heading.  It is usually 30 degrees or more off of actual heading.  Is there a calibration mode for the A/P?

My device not infrequently messages that it wants to shut off and some times it does.  At other times it has introduced errant output to the point I have to disconnect to avoid making unwanted attitude changes.  A few times I've had it not want to let go and I have had to do the equivalent of popping the c/b.  

It seems to be doing this less and less and maybe the a/p heading is gradually getting closer to the Cheltons.  

Any thoughts?

John Barrett

Sent from my iPad


On Aug 16, 2013, at 11:42 AM, "Dan Schaefer" <dfs155@roadrunner.com> wrote:

> By the way all, be aware that in many parts of the country, the magnetic field lines have shifted enough to change runway numbers. my home field (KCOE, Coeur d'Alene, Idaho) had to renumber the runways recently - Rnwy 1/29 became 2/20 and 5/23 became 6/24. Be sure to check whether the airport where you do your calibration has changed recently and if field compass rose (if there is one) has been updated to match it or you will mis-calibrate your compass.
>
> Dan Schaefer
>
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