190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page B-5
B.3 Lancair Aircraft
This section provides guidance for GMU magnetometer installation in specific Lancair aircraft. GMU 11
installations should use the GMU 22 guidance given in this section as a reference for magnetometer
placement.
B.3.1 Lancair IV/IV-P
Differences exist between the Lancair IV/IV-P and the ES series aircraft that result in different mounting
techniques for the GMU magnetometer.
B.3.1.1 GMU 22 Mounting Bracket
The Lancair IV/IV-P GMU 22 mount (011-01788-00) is composed of a top (115-01052-00) and bottom
(115-01052-01) assembly. An aircraft specific mounting bracket has been developed to accommodate the
full wing tank option and thin wing tip area remaining. The bracket is specific to the right wing tip, and
can be used with the standard tip or winglet.
B.3.1.1.1 GMU 22 Mount Installation Guidance
One possible mounting location for the GMU 22 is in the right wingtip (refer to Figure B-3). The bottom
assembly should be screwed and glued to the bottom of the wingtip using the dimensions below. Care must
be taken to accurately align the mount parallel to the edge of the wingtip. This will make sure the finished
installation will have the proper alignment with the aircraft’s heading.
NOTE
It is recommended the wingtip antenna option be omitted from this wingtip to prevent
interference with the magnetometer.
Figure B-3 Lancair IV/IV-P Right Wingtip GMU 22 Installation
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