Mailing List lml@lancaironline.net Message #46539
From: Colyn Case on earthlink <colyncase@earthlink.net>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Installing Magnetometer in 360
Date: Wed, 19 Mar 2008 13:55:53 -0400
To: <lml@lancaironline.net>
I have it in my IVP at the front of the glass region ahead of the vstab.   Works great.   The GRT firmware is really slick and can handle huge compensations.   You just take it out on the ramp, get the ahrs up and then rotate the plane once.  It's all done in a minute and accurate to < 1 degree.
 
 
The useful part of this message:   I had a 40 degree deviation on the HSI which I couldn't take out with the compensator.    We put a hand compass through the general mounting area and found large deflections.   This is in an area that is mostly fiberglas and all the bolts were stainless or brass.   The only ferrous item in the area were the nut-plates.   A degausser took that out and voila: no deviation.
 
....easy to do when there are no dynamic variations.    I expect getting away from conductors more important than anything else.....
 
Colyn
 
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