fasilpereira
Well Known Member
I'm installing a G3X system on a COMPOSITE airframe, with GSA 28 servos and Ray Allen trim servos with autotrim function as per G3X/G3x Touch Installation Manual. I'm using Figure 24-1.8 GMC 507/GSA 28 Interconnect Drawing as a reference for this installation.
The trim motor wires are connected to TRIM OUT 1/2 on the GSA 28. Figure 27-1.8 shows the trim motor wiring as a twisted shielded pair, with shield terminated to Garmin shield block ground on the GSA 28 connector and to the airframe ground on the trim motor end.
The problem is that I don't have any airframe ground near the servos. Will I have to take an additional ground wire up to the rudder, aileron and elevator for that?
Another weird thing to me is that the TRIM 1/2 wires are shown as unshielded wires. These are the wires that comes from the trim switches and are basically the same signal as TRIM OUT 1/2, but before the GSA 28.
Have you, RV builders, used a shielded pair for TRIM OUT 1/2? Have you grounded it to the aircraft structure or to a dedicated ground inside the control surfaces?
Thank you,
Fabricio
The trim motor wires are connected to TRIM OUT 1/2 on the GSA 28. Figure 27-1.8 shows the trim motor wiring as a twisted shielded pair, with shield terminated to Garmin shield block ground on the GSA 28 connector and to the airframe ground on the trim motor end.
The problem is that I don't have any airframe ground near the servos. Will I have to take an additional ground wire up to the rudder, aileron and elevator for that?
Another weird thing to me is that the TRIM 1/2 wires are shown as unshielded wires. These are the wires that comes from the trim switches and are basically the same signal as TRIM OUT 1/2, but before the GSA 28.
Have you, RV builders, used a shielded pair for TRIM OUT 1/2? Have you grounded it to the aircraft structure or to a dedicated ground inside the control surfaces?
Thank you,
Fabricio
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