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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
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