Auto pilot odd behavior

[AndiKunzi 62]

N100L has an S-Tec 60-2 (similar to the 55X) with Altitude Preselect via the Aspen EFD1000. 

[MartinRex007 390]

If I track to a VOR after takeoff (which works fine) then change nav source to my GPS route the AP picks up the route with no problem, but if I takeoff and turn to a heading for a GPS route first and hit NAV on the AP the GS comes on and the plane loses control, very odd. Still have some more testing to do but I can live with this little anomaly.

Cheers

Martin

[Bert Pieke 7,584]

Just now, MartinRex007 said:

If I track to a VOR after takeoff (which works fine) then change nav source to my GPS route the AP picks up the route with no problem, but if I takeoff and turn to a heading for a GPS route first and hit NAV on the AP the GS comes on and the plane loses control, very odd. Still have some more testing to do but I can live with this little anomaly.

Cheers

Martin

I have looked at the autopilot code.. When you push the NAV button, the autopilot switches on:  NAV or APR, depending on whether the nav source has a localizer active.  That sounds kind of logical, but could go wrong depending on the variables, as you are experiencing.   Give me your email address and I'll send you a mod with this option disabled.. that might just work better for you.

Interestingly, I have not run into this, but that may depend on what NAV1 is tuned to at the moment that the NAV button is pushed..

If you can describe the exact scenario where you have this occur, I can try to duplicate it on my system and track some variables if required..

[Bert Pieke 7,584]

For anyone who likes to tinker with autopilot xml files, look in the Mouse section for the NAV button, and change

@Nav1Haslocalizer

to

@Nav1Haslocalizer  (A:GPS DRIVES NAV1, bool) ! and

That should prevent this from happening if GPS mode is active.

[MartinRex007 390]

Bert,

That fixed it, I sent you an e-mail explaining it in a little more detail, thanks so much for your help with this!

Regards

Martin

[Bert Pieke 7,584]

Just now, MartinRex007 said:

Bert,

That fixed it, I sent you an e-mail explaining it in a little more detail, thanks so much for your help with this!

Regards

Martin

[fppilot 4,335]

Assume one needs to extract the xml from the cab file?  Then how to subsequently position it properly?

[Bert Pieke 7,584]

Just now, fppilot said:

Assume one needs to extract the xml from the cab file?  Then how to subsequently position it properly?

I create a subfolder to the panel folder with the same name as the cab file.

Extract the files(s) that you want to edit.

Drop the xml file(s) in the new subfolder and change their file name(s) by adding a character or two.

Reference the changed names in the panel.cfg file.

Example:

Folder name: AUTOPILOTO_C421

File name: Gauge_AUTOPILOT_C421_MSV4.xml

Panel.cfg file:  gauge01=AUTOPILOTO_C421!Gauge_AUTOPILOT_C421_MSV4,        0, 411,384,384

 

 

 

 

 

[Bert Pieke 7,584]

And while you are at it.. change "or" to "and"..

<Element id="GS">
     <FloatPosition>0.000,0.000</FloatPosition>
     <Visibility>(A:AUTOPILOT APPROACH HOLD,BOOL) @Nav1GSIActive and (L:Gauge_TEST_C421_FD,number) 1 == or</Visibility>
     <Image id="Image" Name="Gauge_AUTOPILOT_C421_MS_GS.bmp">
                <Transparent>true</Transparent>
                <Bright>false</Bright>
            </Image>
     </Element>