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Engine Model Accuracy

Scheduled Pinned Locked Moved Caravan Professional
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  • A asnamara

    @Persojet without pulling out charts, 166kts with no pods at 8k sounds reasonable. Pod reduces performance by about 3 kts from what I understand.. Also we don't really deal in ISA, just OAT and Altitude.. ISA + 6 at 8k is around 5C?
    The lights are actually pretty blinding with Landing Lights on, we usually keep Taxi/Recog only until the very late on the landing, and only switch the full Landing Lights on just before landing as it does helps with depth perception for touchdown. The landing lights also mess up your peripheral vision at night.

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    Persojet
    wrote on last edited by
    #15

    @asnamara I was trying to reach maximum cruise power, but couldn't even go over 1500 torq wihtout being ITT limited. If I reduced ISA manually to 0, I could reach the 182 kt at ITT limit and 1750 torq.

    7fac68f0-403f-426e-b1cc-c3ef1d74a4ac-image.png

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    • P Persojet

      @asnamara I was trying to reach maximum cruise power, but couldn't even go over 1500 torq wihtout being ITT limited. If I reduced ISA manually to 0, I could reach the 182 kt at ITT limit and 1750 torq.

      7fac68f0-403f-426e-b1cc-c3ef1d74a4ac-image.png

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      asnamara
      wrote on last edited by
      #16

      @Persojet yes it seems the torque vs ITT is not "okay" right now as per my original post above. You should in all normal circumstances at 8k be able to achieve Max Cruise Torque. Just looked at the chart anyways. On the podless caravan at 8k and 5C you should achieve about 172 kts. 166 is not far off.. so once you're able to achieve Max Torque it should bring you closer to that speed.

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      • P Persojet

        @asnamara I was trying to reach maximum cruise power, but couldn't even go over 1500 torq wihtout being ITT limited. If I reduced ISA manually to 0, I could reach the 182 kt at ITT limit and 1750 torq.

        7fac68f0-403f-426e-b1cc-c3ef1d74a4ac-image.png

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        asnamara
        wrote on last edited by
        #17

        @Persojet also check that your fuel condition lever is in high idle. As having it in low idle will significantly affect your data in flight on this simulation. Whereas in real life, there is no difference in cruise between low and high idle. I believe @Black-Square Nick has that already fixed this issue in an upcoming update? Think I read that in one of the previous posts.

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        • A asnamara

          @Persojet also check that your fuel condition lever is in high idle. As having it in low idle will significantly affect your data in flight on this simulation. Whereas in real life, there is no difference in cruise between low and high idle. I believe @Black-Square Nick has that already fixed this issue in an upcoming update? Think I read that in one of the previous posts.

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          Persojet
          wrote on last edited by
          #18

          @asnamara said in Engine Model Accuracy:

          @Persojet also check that your fuel condition lever is in high idle. As having it in low idle will significantly affect your data in flight on this simulation. Whereas in real life, there is no difference in cruise between low and high idle. I believe @Black-Square Nick has that already fixed this issue in an upcoming update? Think I read that in one of the previous posts.

          I was in high idle. Maybe they'll patch the ITT and that allows to hit max cruise in normal flight like you say. Now it hinders the performance a lot when it's positive ISA.

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            MiRexer
            wrote on last edited by
            #19

            LOVE this conversation and SO looking forward to the improvements in V1.1!!

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              jmarkows
              wrote on last edited by
              #20

              As far as the lights go, that's MSFS being way overdone with the scattering in SU4. Not sure if a fix is planned in SU5 or not.

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              • P Persojet

                @asnamara Are these values highly ISA specific as I noted that if weather is like ISA +6, with this caravan you can only obtain lik 166kt at 8k ft, which seems really slow to me on no pod passenger model.

                Also not really for this thread, but would like to hear from real world pilot. Are the lights at night really that blinding even in clear weather? I feel like they are fog generators on their own. 1a0324c9-964a-4443-91b5-bab9f079052f-image.png

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                SadBucket
                wrote on last edited by SadBucket
                #21

                @Persojet No. To my knowledge if you are not using HDR turning off Light Shafts in the Graphics settings fixes the issue. IRL you will see bloom like that only in visible moisture or hazy conditions (tho generally landing lights are also not as bright as they are in MSFS). HiFi have also vocalized issues with not being able to change the atmospheric density in MSFS2024... Very frustrating imo.

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                • Black SquareB Offline
                  Black SquareB Offline
                  Black Square
                  Black Square Developer
                  wrote on last edited by
                  #22

                  We have continued to beg Asobo for a fix to the light scattering in the developer forums, but there has been no engagement from Asobo since September of last year.

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                  • Black SquareB Black Square

                    We have continued to beg Asobo for a fix to the light scattering in the developer forums, but there has been no engagement from Asobo since September of last year.

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                    SadBucket
                    wrote on last edited by
                    #23

                    @Black-Square If I ever make a ton of money I'll buy my way into Asobo and start flipping over tables until it's fixed (amongst other more critical issues). For now we just have to be happy with what we have which begrudgingly is better than we've ever had before. It's almost more frustrating being so close to perfect and seeing no movement on issues that seem to pale in complexity when compared to everything else the sim can do.

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                    • Black SquareB Black Square

                      We have continued to beg Asobo for a fix to the light scattering in the developer forums, but there has been no engagement from Asobo since September of last year.

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                      Persojet
                      wrote on last edited by
                      #24

                      @Black-Square can the volumetric effect be disabled until it fixed or flipswitch for this added to tablet?

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                        HobAnagerik
                        wrote on last edited by HobAnagerik
                        #25

                        Regarding Beta audio, I recorded some footage of the Blackbird PC-6 Turbo Porter.

                        https://youtu.be/ZQlqOhyAvdQ?si=NFF_1ZMaDFdaeip0

                        To me this sounds a lot better than the Caravan.

                        Regarding volumetric lights, you can tweak those yourself. In the "effects" folder you will find a number of .fx files, and one of these will be for landing lights, one for taxi, and so on. The structure of them is pretty simple, and at the bottom there is a chunk with the "volumetric" setting.

                        Most developers set that to 1, which makes it look like they are shining through fog even if there isn't any. If you set it to 0, then you don't see them at all, and worse they don't interact with cloud either. But if you set it to 0.01-0.05, then you can barely make the light cone out in normal weather, and they will then interact with clouds.

                        I made a post about this on the MSFS forums.

                        https://forums.flightsimulator.com/t/general-su5-beta-feedback-thread/757574/367

                        P Black SquareB 2 Replies Last reply
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                        • H HobAnagerik

                          Regarding Beta audio, I recorded some footage of the Blackbird PC-6 Turbo Porter.

                          https://youtu.be/ZQlqOhyAvdQ?si=NFF_1ZMaDFdaeip0

                          To me this sounds a lot better than the Caravan.

                          Regarding volumetric lights, you can tweak those yourself. In the "effects" folder you will find a number of .fx files, and one of these will be for landing lights, one for taxi, and so on. The structure of them is pretty simple, and at the bottom there is a chunk with the "volumetric" setting.

                          Most developers set that to 1, which makes it look like they are shining through fog even if there isn't any. If you set it to 0, then you don't see them at all, and worse they don't interact with cloud either. But if you set it to 0.01-0.05, then you can barely make the light cone out in normal weather, and they will then interact with clouds.

                          I made a post about this on the MSFS forums.

                          https://forums.flightsimulator.com/t/general-su5-beta-feedback-thread/757574/367

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                          Persojet
                          wrote on last edited by
                          #26

                          @HobAnagerik that volumetric edit could also fix it for everyone if done by black square as it seems game developers have no intent to fix it game side.

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                            HobAnagerik
                            wrote on last edited by
                            #27

                            It's not much more than a fudge, but it would work. I've applied it to all of the planes that I fly regularly.

                            There are many weird lighting issues with the sim that are too complex to discuss here without going massively off topic.

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                            • A asnamara

                              Hi Nick!
                              Thank you so much! What a wonderfully modeled aircraft!
                              Everything works beautifully!
                              The sounds are amazing.. The start procedure and the engine data during start and Take-off are really close.
                              The cruise data however is a little bit off.. I've got a couple 1000 hours on the real aircraft. and my comments on the cruise data is as follows:
                              We always cruise at Max Cruise power settings. on your Sim, I have the following altitude: 12,000 feet, 8 degrees Celsius. Using Max Cruise power setting of 1390 ft-lbs torque with 1750 rpm as per the aicraft POH. Your fuel flow is very close: 310 lbs/hr. Your ITT is 740 degrees.. ITT at Max Cruise power, with most airframe i have flown is between 695-710. most of them sit at 705. This is standard for most caravan at Max Cruise. Fuel flow is between 295-305 at that power setting.
                              The exact aircraft i flew today had the exact altitude and temperature at 12,000 and 8 degrees. 703 ITT and 301 Fuel Flow..
                              I know i'm nitpicking! just that 740 ITT at max cruise on your model.. should be a lot more conservative than that..
                              Beautiful aircraft that you have designed there! Thank you so much!
                              Best regards,
                              Amara

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                              Galf
                              wrote on last edited by
                              #28

                              @asnamara thank you for putting real numbers behind my gut feeling, I had a similar setup, but I was cruising at 15k and my ITT was in the 800s! I was cruising at 1300 ft-lbs to keep the temps in check

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                              • H HobAnagerik

                                Regarding Beta audio, I recorded some footage of the Blackbird PC-6 Turbo Porter.

                                https://youtu.be/ZQlqOhyAvdQ?si=NFF_1ZMaDFdaeip0

                                To me this sounds a lot better than the Caravan.

                                Regarding volumetric lights, you can tweak those yourself. In the "effects" folder you will find a number of .fx files, and one of these will be for landing lights, one for taxi, and so on. The structure of them is pretty simple, and at the bottom there is a chunk with the "volumetric" setting.

                                Most developers set that to 1, which makes it look like they are shining through fog even if there isn't any. If you set it to 0, then you don't see them at all, and worse they don't interact with cloud either. But if you set it to 0.01-0.05, then you can barely make the light cone out in normal weather, and they will then interact with clouds.

                                I made a post about this on the MSFS forums.

                                https://forums.flightsimulator.com/t/general-su5-beta-feedback-thread/757574/367

                                Black SquareB Offline
                                Black SquareB Offline
                                Black Square
                                Black Square Developer
                                wrote on last edited by
                                #29

                                @HobAnagerik said in Engine Model Accuracy:

                                But if you set it to 0.01-0.05, then you can barely make the light cone out in normal weather, and they will then interact with clouds.

                                Is that really so? I'll try it immediately. On the developer support forums, we were convinced that it just became binary in MSFS 2024 (0=no effect, 1=virtually unusable), but perhaps we were all too frustrated to try crazy small values like 0.01. Of course, the moment I fix this for my entire fleet, Asobo will probably fix it on their end, unfixing it for me. I'll let you know what I find later.

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                                • H HobAnagerik

                                  It's not much more than a fudge, but it would work. I've applied it to all of the planes that I fly regularly.

                                  There are many weird lighting issues with the sim that are too complex to discuss here without going massively off topic.

                                  Black SquareB Offline
                                  Black SquareB Offline
                                  Black Square
                                  Black Square Developer
                                  wrote on last edited by
                                  #30

                                  @HobAnagerik What I'm seeing is that any value from 0-1 written in the effect file gets converted to either 0 or 1 once the aircraft is loaded. You can still adjust the effect in the lighting debug dialog, but the file gets read as only a binary on/off.

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                                    HobAnagerik
                                    wrote on last edited by
                                    #31

                                    You may be right. I had noticed that actually, but hadn't nailed down what was causing it. I assumed I had maybe broken something in the file.

                                    If that were able to be reset somehow after spawn in it would be a great workaround.

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                                    • S SadBucket

                                      @Persojet No. To my knowledge if you are not using HDR turning off Light Shafts in the Graphics settings fixes the issue. IRL you will see bloom like that only in visible moisture or hazy conditions (tho generally landing lights are also not as bright as they are in MSFS). HiFi have also vocalized issues with not being able to change the atmospheric density in MSFS2024... Very frustrating imo.

                                      S Offline
                                      S Offline
                                      SadBucket
                                      wrote on last edited by SadBucket
                                      #32

                                      @Persojet

                                      said in Engine Model Accuracy:

                                      To my knowledge if you are not using HDR turning off Light Shafts in the Graphics settings fixes the issue.

                                      (HDR locks light shafts on for some reason) This will basically give the effect of setting the "volumetric" setting to 0 and the only "fix" I know of.

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                                      • Black SquareB Black Square

                                        @HobAnagerik What I'm seeing is that any value from 0-1 written in the effect file gets converted to either 0 or 1 once the aircraft is loaded. You can still adjust the effect in the lighting debug dialog, but the file gets read as only a binary on/off.

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                                        H Offline
                                        HobAnagerik
                                        wrote on last edited by HobAnagerik
                                        #33

                                        @Black-Square It might be useful to have this logged as a potential SDK bug, as the values definitely work. It’s a shame they don’t persist. You can set it to very large numbers as well, much higher than 1, if you really want that lighthouse effect.

                                        Black SquareB 1 Reply Last reply
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                                        • H HobAnagerik

                                          @Black-Square It might be useful to have this logged as a potential SDK bug, as the values definitely work. It’s a shame they don’t persist. You can set it to very large numbers as well, much higher than 1, if you really want that lighthouse effect.

                                          Black SquareB Offline
                                          Black SquareB Offline
                                          Black Square
                                          Black Square Developer
                                          wrote on last edited by
                                          #34

                                          @HobAnagerik Oh, we've tried... Ours is the last request in February with no response. I'll see if we can elevate it again. Also, if you set the light softness to a very big number, you can create some really wild effects.

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