Then you don't have 16.2.4, so that isn't the issue. The wiring to the servos is not the same for the HDX as it was for the TruTrak, so that's a possible issue, but I doubt it. If you aren't using the HDX to control the servos at all, but still relying on the TruTrak autopilot for that, then wiring isn't the issue. My impression is it's a configuration issue, but I'm far from being an expert on HDX interfacing with TruTrak autopilots. If someone more knowledgeable in that regard doesn't chime in here, I suggest contacting Dynon Support.
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Thanks for sharing your thought. Yes I agree with your logic.
There are a lot of Dynon users with this setup when the Dynon AP was not certified. I chose to stay with this setup so I have an extra redundancy on my system. I was hoping that someone had similar experience and found a quick configuration fix (on either or both units) when I posted on this forum.
The Trutrak does rate 1 turn when in track mode and GPSS mode (from the Avidyne or Garmin GNS430 Nav sources). It works perfectly. The lateral setting is "Mod" on the Trutrak setup. So there is not any problem with the wiring.
The issue I have is that in the Skyview mode where the data streams from the Dynon for the lateral heading/GPS track, vertical speed and altitude controls. The lateral roll seems to be limited to 15 degrees rather than a true rate 1 turn in both heading or GPS track mode. I am IFR rated so when radar vectored in the CTA, I had to disengage the autopilot, hand flied this part to maintain the rate 1 turn then re-engaged the autopilot or sometimes I could not be bother and just put left it in track mode with the Nav unit and adjusted it according to the windrift for the correct radar vector.
I wonder if Dynon or someone had a quick fix for this to reduce the workload?
Yes I agree with Jake. The Dynon and TruTrak interface could do with some tweaking. The Trutrak is a great and simple to use unit otherwise especially for VFR.