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Date: Fri, 16 Aug 2013 19:08:22 -0400
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Subject: Re: [LML] Re: Compass calibration
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From: Paul Miller <pjdmiller@gmail.com>
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Some have internal compasses (mine) others are different.   Unit and slaving=
 details needed.

Paul

On 2013-08-16, at 14:23, John Barrett <2thman1@gmail.com> wrote:

> Speaking of calibration I have been meaning to ask a burning question abou=
t Tru Trak a/p.  mine is confused about heading.  It is usually 30 degrees o=
r more off of actual heading.  Is there a calibration mode for the A/P?
>=20
> My device not infrequently messages that it wants to shut off and some tim=
es it does.  At other times it has introduced errant output to the point I h=
ave 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 t=
he c/b. =20
>=20
> It seems to be doing this less and less and maybe the a/p heading is gradu=
ally getting closer to the Cheltons. =20
>=20
> Any thoughts?
>=20
> John Barrett
>=20
> Sent from my iPad
>=20
>=20
> On Aug 16, 2013, at 11:42 AM, "Dan Schaefer" <dfs155@roadrunner.com> wrote=
:
>=20
>> By the way all, be aware that in many parts of the country, the magnetic f=
ield 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 bec=
ame 2/20 and 5/23 became 6/24. Be sure to check whether the airport where yo=
u do your calibration has changed recently and if field compass rose (if the=
re is one) has been updated to match it or you will mis-calibrate your compa=
ss.
>>=20
>> Dan Schaefer=20
>>=20
>> --
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ml
>=20
> --
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