Ed Cesnalis Posted June 14, 2016 Report Share Posted June 14, 2016 My big complaint about my auto pilot is that it makes too many correcting turns to maintain course. I do sometimes fly in conditions where my AP maintains course without anoying turns but most of the time I end up turning it off and hand flying to minimize all the corrections. Thinking about it en-route I figured out that the mode type had something to do with how many correcting turns. With my AP these modes are all track oriented. Course (bug) GPS (flight plan) VOR ILS Virtual VOR And this mode is heading oriented Heading (bug)Algorithms might differ but my AP does 1 turn in heading mode to correct and 2 turns in course mode to correct. Here's how it works: Heading mode: 1 turn from current heading rolling out on new heading. Course mode: 1 turn from current heading rolling out on new heading to intercept course lost due to drift or not yet acquired then a 2nd turn to intercept the course rolling out on new heading intended to track the course. In the horizontal axis course modes are more annoying because they do twice as many turns and are more prone to rolling out on a heading that might be wrong because it might not track the course and in that case the turns continue. Heading mode is less annoying but will drift off course every time the cross wind component changes. Heading mode has the advantage of deviations for terrain or airspace that aren't in the flight plan so a little more work moving the heading bug gives me a more pleasant trip than using a course mode. Vertical mode in cruise is annoying but that's the fault of the thermals not the AP. In my light sport the pitch changes can be dramatic and if the horizontal mode is active too the attitudes can be entertaining but annoying and even disturbing. If I'm not happy with the result often I will use 1 axis at a time. Minimizing my gain settings makes the AP easier for me to live with. I mostly hand fly but lately I'm getting along with the AP a little better. What are your tips? PS my AP is fully aerobatic, it has no pitch or bank limitations. The most fun can be had by accidentally reversing the aileron mode in a moderate gain setting. As soon as I activate the bank happens in the wrong direction and the moderate gain setting makes it happen in a faction of a second. The fun comes if you are a little slow hitting disengage because the CT roll rate is pretty good. If you are slow to disengage your next best option becomes a split S maneuver (altitude dependent.) Link to comment Share on other sites More sharing options...
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