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Pitch oscillations while on autopilot

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    Pitch oscillations while on autopilot

    I can only assume I'm not the only one who noticed this. But when in any kind of turbulence while on the autopilot it begins to oscillate fairly rapidly and it is *very* noticeable. Hopefully this is something that can be adjusted in an update. As it is, it's very annoying.

    But overall the plane is great. It is optimized very well for this sim and the sounds are very well done. Looking forward to many hours in it.
    Timothy Long

    #2
    It could be the sim in combination with the plane, I haven't flown it in MSFS turbulence yet. But in P3D version she'd bob up and down quite noticeably and autothrottles would get quite a bit of work out and that was considered accurate behavior. Now it could be that in MSFS she is doing something totally crazy but it also could be that it is a feature and not a bug..
    Aleks Matrosov

    Comment


      #3
      I owned the P3D versions and it didn’t behave in this same manner. Additionally while I may not be typed on the 737 I’ve spent hundreds of hours up front jumpseating to work and I never saw pitch oscillations like this. It doesn’t strike me as normal in any way. Regardless as of now that’s probably my main complaint. Everything else so far is good.
      Timothy Long

      Comment


        #4
        Hah interesting I got dial the weather up and see what it does for me.
        Aleks Matrosov

        Comment


          #5
          yeah i noticed some pitch osicllation during approach


          Last edited by Cmbaviator; 10May2022, 11:25.
          PMDG 747-400/-800
          PMDG 737NGXu

          Camille MOUCHEL-BLAISOT

          Comment


            #6
            Yes,The A/P will allow an altitude bust of hundreds of feet,In P3D, we had to lower the turbulance scale in the weather program per PMDG documentation, same issue again?
            James Driscoll

            Comment


              #7
              Now it's doing it in the climb phase too. It was just at cruise altitude before. Is there any news on a fix yet?

              Adam Bentley

              Comment


                #8
                The latest...

                Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.


                Adam Bentley
                Last edited by Acbent; 21Nov2022, 16:31.

                Comment


                  #9
                  Any comments from the developers? Tried again today, seems worse.

                  Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.


                  Adam Bentley

                  Comment


                    #10
                    Radio silence - I have the same issue. Stopped flying the 737 for now, using the A320 and A310, will try again once there’s been another update. It actually sometimes makes me feel seasick it’s that bad!
                    Damian Newell

                    Comment


                      #11
                      I dont think the devs are monitoring the Forum that much. Open a ticket.
                      Klaus Schmitzer

                      Comment


                        #12
                        Originally posted by Rhinozherous View Post
                        I dont think the devs are monitoring the Forum that much. Open a ticket.
                        I opened a ticket. Haven't head anything back. Last night I did a flight which was ok - only a few incidents of minor pitch oscillations. Today, it's endless and pretty pronounced pitching up and down, so much so, that I lost interest in continuing the flight. Someone mentioned somewhere that the developers acknowledged that there is an issue. I have yet to be able to find anything like that.

                        Adam Bentley

                        Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
                        Last edited by Acbent; 26Nov2022, 02:18.

                        Comment


                          #13
                          I've found the cause of the problem. You need to make sure you have all assists turned off in the Flight Assistant tab; I haven't tested which ones specifically yet, but having them turned on will make the autopilot display erratic behavior like this. I turned the assists off and it behaves fine for me now, no oscillations.
                          Last edited by Marcaroni1; 26Nov2022, 18:30.
                          Paul Iverson

                          Comment


                            #14
                            Originally posted by Marcaroni1 View Post
                            I've found the cause of the problem. You need to make sure you have all assists turned off in the Flight Assistant tab; I haven't tested which ones specifically yet, but having them turned on will make the autopilot display erratic behavior like this. I turned the assists off and it behaves fine for me now, no oscillations.
                            I already have all assists turned off. Thanks

                            Comment


                              #15
                              Originally posted by Marcaroni1 View Post
                              I've found the cause of the problem. You need to make sure you have all assists turned off in the Flight Assistant tab; I haven't tested which ones specifically yet, but having them turned on will make the autopilot display erratic behavior like this. I turned the assists off and it behaves fine for me now, no oscillations.
                              That's a basic first step to using this plane. Most people knew this already. This is not the cause of pitch oscillations.
                              Scott Clark

                              Comment


                                #16
                                The PMDG 737-700 is becoming unusable. The pitch oscillations give me a sick sense of vertigo. Up and down, up and down. I do hope this problem is fixed soon. The plane is otherwise excellent. But this bobbing is no fun and makes me lose interest in flying PMDG.
                                David Mills
                                Huntington, WV

                                Comment


                                  #17
                                  Getting the same pitch oscillation on latest MSFS and PMDG 737-800 3.0.49. I only had ATC assist enabled, and disabling it did not help.

                                  Comment


                                    #18
                                    Just bought the 737. This issue is terrible. Im flying now and the display shows the wind constantly chaning speed every milisecond or so. Sometimes by 1kt and a lot of the time by 5-15kts!
                                    This then causes the constant bobbing up and down.
                                    Now I know MSFS tries to simulate the wind a little to much but this is not good at all if its by design.
                                    Cheers
                                    Jonathan Stevens

                                    Comment


                                      #19
                                      As has been mentioned in other threads about this, take it to the MSFS forums. It is their problem, not PMDG's and Asobo needs to know about it from a lot of folks.
                                      Bob Zolto

                                      Comment


                                        #20
                                        Originally posted by Bob_Z View Post
                                        As has been mentioned in other threads about this, take it to the MSFS forums. It is their problem, not PMDG's and Asobo needs to know about it from a lot of folks.
                                        I'm not convinced this is all down to Asobo TBH.

                                        It's pretty clear to all of us that the weather simulation is not super-realistic and certainly could be better. And I'm convinced that it has a negative effect on the PMDG 737's and upsets their flight modelling. I'm not saying that taking those concerns to Asobo is not a worthwhile pursuit. I agree that's a good thing to do.

                                        However, personally, I don't think it's completely down to Asobo (though it's very difficult to be certain). For instance, I've seen, on plenty of occasions, what appears to be a minor change to windspeed or wind direction start an oscillation in pitch that lasts long after the wind seems to cease changing. To me it seems that the model has issues damping out its response to wind changes at times. I say this not as a pilot with thousands of hours on type, but as a software engineer with thousands of hours in level-D simulators of type. And, as I say, it's difficult without access to more than us mortals have access to, to be sure exactly where the problem lies. I'll be the first to admit that going off instrument indications may not tell the whole story here - so there's that.

                                        My personal feeling is that we need to be raising the issue with Asobo and PMDG and not assuming that the problem lies solely with only one of these parties.

                                        At least I'm confident that, if we do get through to PMDG, that something might be done to alleviate the issue, at least to some degree. I feel they are more responsive then Asobo and care more about how the 737's behave in the sim than Asobo does. I also suspect they are already looking at this and trying to figure out a way forward. But going quite on them would not, IMHO, be prudent.
                                        Greg N.
                                        Avionics Systems Software Engineer

                                        Comment


                                        • DDowns
                                          DDowns commented
                                          Editing a comment
                                          Fair and nothing here that I disagree with; however you must admit creating a realistic flight model that is not upset by unrealistic environment could be a difficult task only resolve by reducing the realism of the flight model, which is what Asobo has done with their baked-in flight dynamics engine. This is why I encourage everyone to pile on Asobo, I don't want my PMDG aircraft to be dumbed down like their new DC-3.

                                        • Want2BFlyin
                                          Want2BFlyin commented
                                          Editing a comment
                                          I agree with you in principle. However, if the root cause of this issue is indeed Asobo's weather system (I've not noticed this particular issue myself, so I don't really have any personal insight into the issue), that is where the main focus should be for now. I am sure that PMDG can continue to mitigate this issue for their 737. However, as long as Asobo keeps adjusting the weather system, that is going to continue to affect any work that PMDG puts into this. I don't know if PMDG can really justify putting a significant amount of time into addressing this when they know that Asobo is eventually going to change the underlying system again and all of that work will need to be done again. At some point, Asobo will stop changing the weather in MSFS (I HOPE that we have a good weather system at that point). THAT is when PMDG needs to put their work into resolving this issue.

                                        #21
                                        All - KMGE - KCHS - FedEx 700 Freighter, 2/3rd fuel-Random Cargo. Put in FP from Navigraph, plane flew it fine. I also noticed pitch occultations for the whole flight, up and down, up and down. Clear WX, not sure what it was. Set FL200 in plan, plane never took it that high, NO ATC. Although the plan was in MSFS as well, just forgot to implement it. Lost sound of engines about halfway through, upon approach, and I took over for landing, sound of engines came back. My setting for reverse thrust worked fine, spoilers also worked fine. However, that same spoiler setting does not work on the DC Designs F-14, and before (took sim off pc, and then reinstalled) one setting for all and it worked. This time I had to reconfigure all settings for Virpil Devices. Took two days for that and have tried a bunch of different Choices for spoilers, but none of those work in all planes. Maybe it's called something else for DC designs, still working on that. Now got to plan another flight for tomorrow evening. Maybe Joint Base Andrews to see if the scenery is still fixed.
                                        Montgomery Bonner

                                        Comment


                                          #22
                                          Noticed these pitch oscillations as well. Quite annoying tbh, and not something that is seen with other airliners like Fenix A320 or the Ini A310.
                                          Cheers,
                                          Hendrik Blok

                                          Comment

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