I decided I had a fairly good idea for the locations of the G3X components and so I started to lay them out on the sub panel. I tried my best to make everything fit as I thought they should be oriented for best access and routing of wires. I had to add support for the mounting of the GSU-25 to make the sub panel more rigid.
GSU 25 provides the following functions:
• Attitude (pitch, roll) • 3 axis accelerations • 3 axis angular rates • Magnetic heading (with input from GMU 22) • Pressure/density altitude • Vertical speed • Indicated/true airspeed • Angle of attack • Outside and total air temperature (via GTP 59)
I mounted the GEA-24 unit on the sub panel near the firewall where most the connections will exit and go towards the engine. The GEA 24 is an input/output system used to monitor and power engine and airframe sensors for the Experimental – Amateur Built (E-AB) and Light Sport Aircraft (LSA) markets.
The GEA-24 provides:
• 9 pin network-power connector • 50 pin miscellaneous connector for airframe sensors • 25 pin thermocouple input connector • 37 pin miscellaneous connector (for airframe sensors) will provide for the following input/output functionality: ◦ Configure analog, digital, and discrete I/O capability ◦ Output digital measurement of analog input resistive sensors ◦ Output digital measurement of analog input voltages ◦ Output digital state of discrete input sources ◦ Output frequency measurement of digital input sources ◦ Control of discrete annunciator outputs
I mounted the GAD-29 near the GEA-24 but further away from the firewall.
Th GAD-29 provides:
• 2 Low Speed ARINC 429 Transmitters • 4 Low Speed ARINC 429 Receivers • 1 CAN Network Port
The below picture was a preliminary placement idea but as you can see the final has changed a bit.