X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 19 Mar 2008 13:55:53 -0400 Message-ID: X-Original-Return-Path: Received: from elasmtp-mealy.atl.sa.earthlink.net ([209.86.89.69] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2797715 for lml@lancaironline.net; Tue, 18 Mar 2008 20:20:41 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.69; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=TxVFvpbgaAMOyCOMq1vXo0SKaOmTHLz3hen1aAcI0Yo5P0KfuOB378uOHmIfffC0; h=Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-ELNK-Trace:X-Originating-IP; Received: from [216.57.118.92] (helo=ccaselt2) by elasmtp-mealy.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1Jbm2E-0002Rb-8r for lml@lancaironline.net; Tue, 18 Mar 2008 20:20:02 -0400 X-Original-Message-ID: <005f01c88956$f9555110$6601a8c0@nvidia.com> From: "Colyn Case on earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Installing Magnetometer in 360 X-Original-Date: Tue, 18 Mar 2008 20:19:58 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0058_01C88935.70184590" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940059153e40e302281feab805c827d37b8350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 216.57.118.92 This is a multi-part message in MIME format. ------=_NextPart_000_0058_01C88935.70184590 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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.=20 ....easy to do when there are no dynamic variations. I expect getting = away from conductors more important than anything else..... Colyn ------=_NextPart_000_0058_01C88935.70184590 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I have it in my IVP at the front of the = glass=20 region ahead of the vstab. Works great. The GRT = firmware=20 is really slick and can handle huge compensations. You just = take it=20 out on the ramp, get the ahrs up and then rotate the plane once. = It's all=20 done in a minute and accurate to < 1 degree.

The useful part of this = message: I had=20 a 40 degree deviation on the HSI which I couldn't take out with the=20 compensator. We put a hand compass through the general = mounting area and found large deflections. This is in an = area that=20 is mostly fiberglas and all the bolts were stainless or = brass. The=20 only ferrous item in the area were the nut-plates. A = degausser took=20 that out and voila: no deviation.

....easy to do when there are no = dynamic=20 variations. I expect getting away from conductors more = important than anything else.....

Colyn

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