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Autopilot Track accuracy

Posted: Sun May 30, 2021 9:29 am
by MikeBlackburn
Wondering if the hive mind has any ideas here - my autopilot, when flying on the HSI GPS mode always seems to fly right of track (usually about 0.3-0.5nm. Is this to do with my lateral control sensitivity settings in the setup? It's a little frustrating - think it should do better than that?

Re: Autopilot Track accuracy

Posted: Fri Jun 25, 2021 9:54 pm
by apachejoe
I had the same issue when using the MGL GPS for position and a GNS 430 for navigation. When the Garmin was set to "Auto" for course width accuracy it always flew right of course. I changed the Garmin setting to a manual setting of 0.3 NM (I think) and now it flies exactly in the center of the HITS boxes.

Re: Autopilot Track accuracy

Posted: Sat Jun 26, 2021 1:31 am
by Tasmag
I have a very similar issue using an explorer lite

On autopilot the plane always flies left of track, if I am heading to a waypoint it eventually gets itself of track enough that it makes a right turn to intercept the original track.

The only explanation u came up with was vibration confusing the built in sensors of the Lite.

This is in a Jabiru, which have the console bolted directly to the firewall.

Mike

Re: Autopilot Track accuracy

Posted: Mon Jul 19, 2021 12:24 pm
by MikeBlackburn
Anyone else have any input on this? On Saturday I was consistently 1.5nm right of track. It’s not a go-no go issue but I don’t understand why it should be happening. Eventually used the heading bug to manually fly the desired track….

Re: Autopilot Track accuracy

Posted: Fri Jul 23, 2021 10:41 am
by Mmacey
I have an Odyssey G2. The track accuracy was centered using the internal GPS. Now I use a Garmin GPS175. The track consistently drifts and stays about a needles with left. Selecting direct-to corrects it temporarily. Also when approaching a fix for a course change the CDI is slow to change to the new bearing ( about 3 to 4 seconds) This causes the autopilot to try to do a 180.
Mike

Re: Autopilot Track accuracy

Posted: Thu Sep 23, 2021 3:40 pm
by drvale
I have an Explorer G3 and it consistently flies slightly right of track Upto ½ mile, has always done so. Have mentioned on a few occasions previously. Don't use for an IFR approach!