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747-400/800 Slamming down on touchdown

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    747-400/800 Slamming down on touchdown

    Afternoon Aviators,

    I have noticed on my last couple of flights that the aeroplane slams down on runway upon touchdown and sometimes on rotation during take-off roll. This phenomenon occurs a lot in 747-800/F. Usually when landing manually I tend to aim for about 4-5 degrees pitch up reference on artificial horizon and try to look at the end of runway but sometimes the plane just smashes down on touchdown. I believe both B744 and B748 have been updated to latest version.

    Any suggestions or comment?
    Usama Ahmed - UK ICAO PPL (A) with Night Rating


    #2
    This is a P3D issue that reveals itself with the longer body aircraft such as the 747. It's common where there is a water/land interface near the runway but I've also seen it when there is an abrupt elevation change in terrain. The common fix is to not use anything of higher terrain resolution than 5m, but even this doesn't fix it 100% of the time.
    Dan Downs KCRP
    i7-10700K 32GB 3600MHz 3080Ti

    Comment


      #3
      Originally posted by DDowns View Post
      This is a P3D issue that reveals itself with the longer body aircraft such as the 747. It's common where there is a water/land interface near the runway but I've also seen it when there is an abrupt elevation change in terrain. The common fix is to not use anything of higher terrain resolution than 5m, but even this doesn't fix it 100% of the time.
      Ok I shall try that setting and see if it happens again, It normally happens to me at quite few airports all using addon sceneries (KSFO, ELLX, EGGW, PANC to name few)
      Usama Ahmed - UK ICAO PPL (A) with Night Rating

      Comment


        #4
        You talking about something like this?

        Twitch is the world's leading video platform and community for gamers.

        Twitch is the world's leading video platform and community for gamers.
        Captain Kevin

        Kevin Yang

        Comment


          #5
          Originally posted by Captain Kevin View Post
          You talking about something like this?

          Twitch is the world's leading video platform and community for gamers.

          https://clips.twitch.tv/BrightChilly...8oCP2fw0GqA2X0

          Yes Kevin exactly the same thing, mostly with B748 but it does happen on B744 sometimes.
          Usama Ahmed - UK ICAO PPL (A) with Night Rating

          Comment


            #6
            Yeah, I knew people were having that issue, this is the first time I ever had it happen. Go figure it happened on the same runway. Interesting because I haven't touched any of the settings in years, and I've landed on that runway multiple times before.
            Captain Kevin

            Kevin Yang

            Comment


              #7
              Originally posted by Captain Kevin View Post
              Yeah, I knew people were having that issue, this is the first time I ever had it happen. Go figure it happened on the same runway. Interesting because I haven't touched any of the settings in years, and I've landed on that runway multiple times before.
              Funny, I have had the issue on landings here and then, but some time back -I didnt experience it in the last 2 years maybe. BUT I never had it on takeoff, well, until a few days ago, for the first time ever, with the 744 taking off from a runway I had taken off many times before....I also did not change anything in my settings except that I activated "use high resolution textures" in P3D V4.5 which I don't think to be relevant for the issue.... I was quite surprised to be honest
              Manolo Ruiz Carrió

              Comment


                #8
                There was another thread with this a few weeks back

                Concur with Dan, I did not find that changing the mesh resolution helps. My issue is exactly as Kevin's video, without the hat - sorry Kevin :-)

                Yes it does happen at KSFO on the water approaches, same at NZAA (both Flightbeam). Does not happen at VHHH. Never seen it at an airport inland (not denying it doesn't happen, I just have not seen it)

                To Sekkha's point I have seen it once of many departures for EGLL 27R in a 744 - nothing changed before or after

                What does help for sure is being a dot high and the aeroplane then misses whatever "invisible obstacle" is in place. It's kind of odd though when you watch the replay that the a/c is landing short
                Adrian Howe

                Comment


                  #9
                  Very interesting. I have never seen this before at a number of airports with water very close. KSFO I have the same addon. I have my mesh set at 1 although I am not sure if that is really needed. I am also using global mesh so maybe that is why I never see it. I am also using P3D 5.3 HF2 if that matters. I do fly mostly the 777 but I used the 747 a lot as well. I will watch for it now and change my mesh setting since it sounds like that helps.
                  Dean Salman

                  Comment


                    #10
                    Originally posted by Extra300driver View Post
                    My issue is exactly as Kevin's video, without the hat - sorry Kevin :-)
                    I mean, you probably don't have this for a setup, either.
                    IMG_9999.jpg
                    Captain Kevin

                    Kevin Yang

                    Comment


                      #11
                      My hat is worse than yours though!!
                      You do not have permission to view this gallery.
                      This gallery has 1 photos.
                      Adrian Howe

                      Comment


                        #12
                        PS - where do you get the jumbo rig from?
                        Adrian Howe

                        Comment


                          #13
                          Originally posted by Extra300driver View Post
                          PS - where do you get the jumbo rig from?
                          Computer originally came from Jetline Systems, although I upgraded just about everything over time, so other than the power supply, the DVD drive, the multi-media drive, and the case, none of the components are the original ones. The yoke is the GoFlight 737 yoke, although I don't know if you can still get them anymore. In fact, I'm not even seeing their website around anymore. The rudder pedals are the Precision Flight Controls Boeing rudder pedals. The throttle quadrant is the Throttletek Boeing 747-400 throttle quadrant. Lastly, the tiller is the Cat3Design Boeing tiller that was just released early this year.
                          Captain Kevin

                          Kevin Yang

                          Comment


                            #14
                            Thanks, Kevin, for the Photo. I was looking for a better rudder system and a throttle. I am tackling a MCP EFIS control system from Flight Deck Solutions but not sure if it will work. I am using the Saitek AP system as a MCP right now. It works pretty well.
                            Dean Salman

                            Comment


                              #15
                              Originally posted by Captain Kevin View Post
                              I mean, you probably don't have this for a setup, either.
                              IMG_9999.jpg
                              I do like your setup Kevin, I have similar setup although only 2 screens and using saitek yoke and throttle with rudder pedals. Having more than 1 screen really helps when flying and looking at charts at the same time. Not to mention in flight entertainment!
                              Usama Ahmed - UK ICAO PPL (A) with Night Rating

                              Comment


                                #16

                                Hello,
                                Can you please tell me if I need another 747 file.
                                I have the Base QOTS II 747-400 and the 800 extension pack.
                                But when I go to install the 747-800 extension says cant find file.
                                Please help

                                Thanks for the time
                                Phil Pizz

                                Comment


                                  #17
                                  Originally posted by Phil View Post
                                  Hello,
                                  Can you please tell me if I need another 747 file.
                                  I have the Base QOTS II 747-400 and the 800 extension pack.
                                  But when I go to install the 747-800 extension says cant find file.
                                  Please help

                                  Thanks for the time
                                  Phil Pizz
                                  Hi Phil,

                                  It's better to open a new topic, rather than add to an existing one.

                                  You shouldn't need another file. Have you tried repairing the base pack installation (run the installer and select the 'repair' option)? That will replace any missing 747 files. Probably best to raise a support ticket for installation issues like this.

                                  Comment


                                  • DDowns
                                    DDowns commented
                                    Editing a comment
                                    We have a B747-800??

                                  • Kevin Hall
                                    Kevin Hall commented
                                    Editing a comment
                                    Not in my post

                                    In fact most 747-8s have two character customer codes (for example, the DLH aircraft are 747-830s) so generically calling them 747-800s while wrong is understandable.

                                  #18
                                  Thank you very much

                                  Phil Pizz

                                  Comment


                                    #19
                                    Originally posted by Captain Kevin View Post
                                    I mean, you probably don't have this for a setup, either.
                                    IMG_9999.jpg
                                    Hello my dear friend, remember me? Regarding on your very nice flight deck what about this one you can make it too.
                                    SCEL - SAEZ | X-Plane 12 | ZiboMod | Flightdeck Solutions | Home Cockpit | B737 | VATSIM -VATUSA - YouTube

                                    Patricio Valdes

                                    Comment


                                      #20
                                      Originally posted by trisho View Post
                                      Hello my dear friend, remember me? Regarding on your very nice flight deck what about this one you can make it too.
                                      SCEL - SAEZ | X-Plane 12 | ZiboMod | Flightdeck Solutions | Home Cockpit | B737 | VATSIM -VATUSA - YouTube
                                      There are three problems with this. First issue is lack of space. I already barely have enough space in my room as it is for my current setup now, which is a little bigger than the one you're looking at since I moved. Second issue is lack of money. As you are aware, I don't have a job anymore, so money be a bit of an issue. Third issue is if I was going to be realistic about it, I would be limited to flying only one aircraft type, which I don't want to do. Though I primarily fly the Boeing 747-400, I do occasionally fly other types.
                                      Captain Kevin

                                      Kevin Yang

                                      Comment


                                        #21
                                        Originally posted by Captain Kevin View Post
                                        There are three problems with this. First issue is lack of space. I already barely have enough space in my room as it is for my current setup now, which is a little bigger than the one you're looking at since I moved. Second issue is lack of money. As you are aware, I don't have a job anymore, so money be a bit of an issue. Third issue is if I was going to be realistic about it, I would be limited to flying only one aircraft type, which I don't want to do. Though I primarily fly the Boeing 747-400, I do occasionally fly other types.
                                        Captain Kevin, go back to trucks and you will be on track making some help to build your dream. A room of 747-400 is waiting for you. My dear friend, never is late! If babies don't cry, no food.
                                        I am still with 747-400 practice and not easy as I thought.

                                        Patricio Valdes

                                        Comment


                                          #22
                                          Originally posted by trisho View Post
                                          Captain Kevin, go back to trucks and you will be on track making some help to build your dream. A room of 747-400 is waiting for you. My dear friend, never is late! If babies don't cry, no food.
                                          I am still with 747-400 practice and not easy as I thought.
                                          If only you knew why I quit in the first place, you'd understand why I don't intend on driving a truck ever again. My health has already deteriorated significantly BECAUSE I've been driving trucks for so long, and a lot of things changed since the pandemic started. If I go back to driving trucks now....WEL, let's just say I won't even make it to retirement if I did that.
                                          Captain Kevin

                                          Kevin Yang

                                          Comment


                                            #23
                                            Originally posted by Captain Kevin View Post
                                            If only you knew why I quit in the first place, you'd understand why I don't intend on driving a truck ever again. My health has already deteriorated significantly BECAUSE I've been driving trucks for so long, and a lot of things changed since the pandemic started. If I go back to driving trucks now....WEL, let's just say I won't even make it to retirement if I did that.
                                            I see now. Please, take care of yourself and your 747-400 room space you have right now I think is more than enough to enjoy it, no questions about.

                                            Patricio Valdes

                                            Comment


                                              #24
                                              I use the Aerowinx PSX B744 with P3dv6 scenery and don't have any issues with the aircraft slamming down.
                                              Bode Bridges
                                              I Earned my Spurs in Vietnam

                                              Comment


                                                #25
                                                Originally posted by Captain Kevin View Post
                                                If only you knew why I quit in the first place, you'd understand why I don't intend on driving a truck ever again. My health has already deteriorated significantly BECAUSE I've been driving trucks for so long, and a lot of things changed since the pandemic started. If I go back to driving trucks now....WEL, let's just say I won't even make it to retirement if I did that.
                                                Kevin,

                                                I noticed that JBG is still driving for ADL.
                                                Bode Bridges
                                                I Earned my Spurs in Vietnam

                                                Comment


                                                  #26
                                                  Originally posted by Bluestar View Post
                                                  Kevin,

                                                  I noticed that JBG is still driving for ADL.
                                                  Yes, he is, but he's also been driving a lot longer than I have. I only did it for just under 8.5 years. In fact, I met him twice during the first year of my trucking career.
                                                  Captain Kevin

                                                  Kevin Yang

                                                  Comment

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