Hi all, I have some weird issues with the autopilot in the C310.
When I start a flight and turn on Autopilot, I select an altitude, press vertical speed up and… nothing happens. I don’t see any numbers on the display and the plane doesn’t climb. When I turn AP off and on again, then it works. I’m not quite sure what triggers the working or not working of the vertical speed.
Exactly the same issue with nav mode. Even when I’m almost exactly on the flightpath and turn on Nav mode, often my plane simply flies in a straight line, slowly getting away from the flight path. At the next leg, AP doesn’t follow the path but continues to fly straight.
And here the same - sometimes it works, sometimes it doesn’t.
I’m doing a world tour, switching planes often. I don’t have these AP issues in any other plane… anybody knows what this noob is doing wrong?
Thanks, I’ll read through this thread and their forum so see if I can find some more info there. I have the pms mod installed but not the wtt mod, just downloaded that and will check if that helps with these issues.
I still have tons of things to learn so when something like this doesn’t work (or in this case, seemingly randomly does or does not work) I’m never sure if it’s a bug or that I’m doing something wrong
I had the same problem, discovered it was related to the autopilot. Try disconnecting the autopilot when you first get in the 310. Then look at the ailerons they should go back to level.
If you turn the AP on when on the Ground, you break" the AP for the rest of that session.
Technical explanation :-
If turned on , when on the Ground, the INTEGRAL ERROR in the AP PIDS builts up, and the output cannot move to the desired point, to reduce the Integral Error over time,
Then , even if you then turn the AP off, those enormous Integral Error values are preserved (they should get zero’ed when the AP is turned off-- a BUG), so later when you turn the AP back on, those built up Integral error values drive the AP outputs to limits, resulting in “A DISASTER” !!
Unfortunately, there seems to be no Dev access to those Integral Error values, so nobody can zero them when the AP is turned off. (Asobo should be doing this by default … but do not)
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Any ideas about why I’m not getting fuel flow with the aux pumps off? Tanks have fuel, fuel selector is to the main tanks. If I turn off the pumps the fuel flow needles go to 0, curiously engine does not stop…
I’m not getting backlighting in the instruments, I’ve tried the 4 rheostats after the exterior panel switches but nothing turns on instruments backlighting.
Perhaps you are using the stock Asobo KAP140 which does have incorrect behavior. There are two mods - search this thread for info regarding the mod on Github. There is also a KAP140 replacement mod in the PMS50 package for GTN750 WTT if you are using that GPS.
Tell me more about the PMS replacement mod? That is what I am using… and yes, I was using the KAP 140 replacement mod. I hand fly to altitude, I have the ALT set, I hit AP, and then hit ALT… Nose dive. Using the SP1 beta patch.
Do you have account on milviz support forum? Discussed there including my theory that dive is due to excessive trim required by sp1 airplane. More trim than the Asobo AP is expecting. I assume this is being studied for fix next release.
If you hold the nose up for a while the AP can catch up. Eventually.
I’m using the SP1 update and the KAP140 mod. Not sure if it’s realistic, but it’s predictable. After establishing a steady climb, I enable AP with my target altitude. Hit UP repeatedly (starts at 0) to get the climb rate I want. After climb out and leveling off, hit Nav to follow the plan.
On descent, things are different. ATC tells me to descend and hold 3000. I dial in 3000 and hit DN and instead of adjusting VS from 0, it decrements my target altitude to 2900. Have to bump it up to 3000, hit ALT, then DN to adjust my VS.
Don’t know what’s right or true-to-life, but as long as it’s predictable and consistent, I’m happy.
When you enable the AP, it shoudl CAPTURE that current VS, and not start off a Zero. (if it was simulated correctly)
In fact, to make it do this, its just a simple change to one of the .cfg files … really surprised that all current planes with type KAP140, have not already had this default VS mode set to the correct value of 2, instead of 0.
