Return-Path: Sender: (Marvin Kaye) To: lml Date: Wed, 09 Jul 2003 14:57:44 -0400 Message-ID: X-Original-Return-Path: Received: from imo-r03.mx.aol.com ([152.163.225.99] verified) by logan.com (CommuniGate Pro SMTP 4.1b8) with ESMTP id 2460476 for lml@lancaironline.net; Wed, 09 Jul 2003 14:56:26 -0400 Received: from JIMRHER@aol.com by imo-r03.mx.aol.com (mail_out_v36_r1.1.) id q.c6.1f9b639d (18555) for ; Wed, 9 Jul 2003 14:56:24 -0400 (EDT) From: JIMRHER@aol.com X-Original-Message-ID: X-Original-Date: Wed, 9 Jul 2003 14:56:24 EDT Subject: Mounting the Crossbow 500 AHRS X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_c6.1f9b639d.2c3dbf58_boundary" X-Mailer: 8.0 for Windows sub 910 --part1_c6.1f9b639d.2c3dbf58_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi Mr. no name, I have gone from the 400 to the #500 Xbow recently. I think your over working the mounting tolerances and I would recommend that you contact Kirk Hammersmith at; Kirk@direct2avionics.com As I remember Lancair Avionics changing mine out, the main thing is to get the "Roll" shimmed so that the White Horizon Line on the screen is level. Requiring the airplane to be level. For the "Pitch" you can use a Level and make it level with the bottom of the baggage door opening. The "Yaw" is just lined up with the centerline of the aircraft as best you can. Then the AHRS will find the center of the earth and will find North during the calibration. We did mine with a computer hooked up to the AHRS and turning 360's on a flat area of an airport, in my case using a compass rose area until the accuracy was about 1*. I now think I can readjust my Mag Compass to the headings on the EFIS and be more accurate than using the compass rose. In the air this #500 AHRS is the best and very steady. I have been able to do high G, S-turns and upon landing, braking, and turning it remains flat and accurate. The previous two AHRS wouldn't do that. Jim Hergert N6XE, "An Sex Y" L4P --part1_c6.1f9b639d.2c3dbf58_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hi Mr. no name,

I have gone from the 400 to the #500 Xbow recently. I think your over workin= g the mounting tolerances and I would recommend that you contact Kirk Hammer= smith at;

Kirk@direct2avionics.com

As I remember Lancair Avionics changing mine out, the main thing is to get t= he "Roll" shimmed so that the White Horizon Line on the screen is level. Req= uiring the airplane to be level. For the "Pitch" you can use a Level and mak= e it level with the bottom of the baggage door opening. The "Yaw" is just li= ned up with the centerline of the aircraft as best you can. Then the AHRS wi= ll find the center of the earth and will find North during the calibration.=20= We did mine with a computer hooked up to the AHRS and turning 360's on a fla= t area of an airport, in my case using a compass rose area until the accurac= y was about 1*. I now think I can readjust my Mag Compass to the headings on= the EFIS and be more accurate than using the compass rose. In the air this=20= #500 AHRS is the best and very steady. I have been able to do high G, S-turn= s and upon landing, braking, and turning it remains flat and accurate. The p= revious two AHRS wouldn't do that.

Jim Hergert
N6XE, "An Sex Y" L4P
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