ES with G3x System, GAD 27 Flaps Help

Justin DeStories · Fri Nov 22, 2024 12:58 pm

We installed (Lancair ES) a dual Garmin G3x system which includes the GAD 27 and currently having some issues with the Flap functions
Setup: Flap system is wire similar to the G3x installation manual (Flap motor goes to TB273, limit switches to J271 on the GAD 27, attachment shows how we wired it). Included a Flap position sensor to the GEA 24 (P244 POS 5 position).

Issues
1. Flap motor coasts past the limit switches or even mid travel. If you creep up on the limit switch it does stop the motor.
2. When you operate the flaps switch that is located in the flight grips, it works in Configuration mode but when you start the G3x in Normal mode it does not move.

Thoughts

Ryan Riley · Fri Nov 22, 2024 3:05 pm

Justin, I had to rewire my flaps when I did my AFS/Dynon panel. My flaps would extend, stop at the limit switch, then not retract. I ended up using new relays which fixed my problem. Have you checked voltage and continuity in both switch positions (up/down) from both sticks?

I assume when in Configuration mode, you can see that the G3X is recognizing the switch actuation?

Ryan Riley · Tue Nov 26, 2024 3:26 am

Justin, circling back on this. Did you find the issue?

Justin DeStories · Tue Dec 10, 2024 8:15 pm

Ryan,
Looking at the G3x manual, the GAD 27 does not have built in relays.
I am not sure how you can use the GAD 27 with the LY1 relays incorporated? The Lancair method has the power passing thru the toggle switch (10 amps) where the GAD 27 and Tosten grips only have a micro switch in the grip.

When moving the flaps, it still coasts once you let go of the switch on the grip. Also, it doesn't go the opposite direction.
I still dont know what combination of wiring we can do that also incorporates the flight grip switch?

You are N701SM and you know Lon N. correct?

How did you wire you flap system using the flip grip and relays?

Ryan Riley · Fri Dec 13, 2024 2:38 pm

Justin, I do know Lon. Have him give you my cell or PM me so we can chat. Fundamentally, we had the same issue - the main difference is the Dynon ACM is doing what the GAD 27 is doing for your G3X. The ACM has 5V inputs that I had to wire the Tosten grips to. However, the Lancair flap relay that is under the rear seat wasn’t compatible with the Tosten grips since they aren’t powered like a panel mounted toggle switch. You correctly stated that the stock Lancair wiring is setup for one powered flap toggle switch (which I hated BTW).

The way we solved it was to wire new automotive style relays, one for each direction. They are hardwired with an inline fuse direct to my Aux bus and that is what gives the proper input to the flaps. The Dynon ACM and GAD 27 are doing the same thing and the way we wired the flaps gives the correct stick input to the the ACM (GAD 27 for you) to properly show the Flap function on the G3X and the powered relays provide the correct voltage to activate the flap motor.

Justin DeStories · Fri Dec 13, 2024 9:43 pm

Ryan Riley wrote: ↑Fri Dec 13, 2024 2:38 pm Justin, I do know Lon. Have him give you my cell or PM me so we can chat. Fundamentally, we had the same issue - the main difference is the Dynon ACM is doing what the GAD 27 is doing for your G3X. The ACM has 5V inputs that I had to wire the Tosten grips to. However, the Lancair flap relay that is under the rear seat wasn’t compatible with the Tosten grips since they aren’t powered like a panel mounted toggle switch. You correctly stated that the stock Lancair wiring is setup for one powered flap toggle switch (which I hated BTW).

The way we solved it was to wire new automotive style relays, one for each direction. They are hardwired with an inline fuse direct to my Aux bus and that is what gives the proper input to the flaps. The Dynon ACM and GAD 27 are doing the same thing and the way we wired the flaps gives the correct stick input to the the ACM (GAD 27 for you) to properly show the Flap function on the G3X and the powered relays provide the correct voltage to activate the flap motor.

Ryan, I can not figure out how to PM under your name. Can you PM me to get in direct contact with you? Also, Layton stated that he gave you a sketch in your paperwork of the wiring for the flaps. Any chance of getting a copy?