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  6. Significant fuel burn discrepancy at FL200-FL240

Significant fuel burn discrepancy at FL200-FL240

Scheduled Pinned Locked Moved Starship
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  • Black SquareB Offline
    Black SquareB Offline
    Black Square
    Black Square Developer
    wrote on last edited by
    #7

    I'll take a look later. I'll be honest, given the discrepancy is so large, I was hoping you guy would find something on your side that explained it, especially MD82's comments. I'll dig in later.

    P 1 Reply Last reply
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    • Black SquareB Black Square

      I'll take a look later. I'll be honest, given the discrepancy is so large, I was hoping you guy would find something on your side that explained it, especially MD82's comments. I'll dig in later.

      P Offline
      P Offline
      ProfCrash
      wrote on last edited by
      #8

      @Black-Square

      I was able to reproduce the issue on my end as well.

      FL200
      Max Range Power set by FF, torque is too high
      Screenshot 2026-06-15 154703.png

      Max Range Power set by Torque, FF is too low
      Screenshot 2026-06-15 155314.png

      FL240
      Max Range Power set by FF
      Screenshot 2026-06-15 155820.png

      The trend continues. I didnt grab an image of the set by torque at FL240 as I had a GFI outlet I had to replace.

      Thanks,
      Crash

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      • M Offline
        M Offline
        Mad_X
        wrote on last edited by
        #9

        @Black-Square Did you have time to take a looki Nick? 🙂

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        • P Offline
          P Offline
          ProfCrash
          wrote on last edited by
          #10

          @Black-Square just wondering if there was an any update on this one?

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          • P Offline
            P Offline
            ProfCrash
            wrote on last edited by
            #11

            @Black-Square Hey Nick, Will the new PT6 model be implemented for the starship in 2024?

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            • P Offline
              P Offline
              ProfCrash
              wrote last edited by
              #12

              @Black-Square Hey Nick, hope all is well. Any word on the fuel burn discrepancy?
              -Crash

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              • Black SquareB Offline
                Black SquareB Offline
                Black Square
                Black Square Developer
                wrote last edited by
                #13

                I just wanted to let you all know that I have made some notes to myself tonight while working on the King Air regarding this. I think I may have found the issue that's causing it. It can be nearly impossible to coax the exact desired engine behavior out of MSFS, even with corrections applied to every parameter in my current engine simulations. This might have been the result of one of those corrections, but it's very careful work to figure out exactly what's going on, and avoid the risk of upsetting every other data point in the performance tables. I'll let you know what I can find, but I make no promises.

                O P 2 Replies Last reply
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                • Black SquareB Black Square

                  I just wanted to let you all know that I have made some notes to myself tonight while working on the King Air regarding this. I think I may have found the issue that's causing it. It can be nearly impossible to coax the exact desired engine behavior out of MSFS, even with corrections applied to every parameter in my current engine simulations. This might have been the result of one of those corrections, but it's very careful work to figure out exactly what's going on, and avoid the risk of upsetting every other data point in the performance tables. I'll let you know what I can find, but I make no promises.

                  O Offline
                  O Offline
                  Outermarker
                  wrote last edited by
                  #14

                  @Black-Square Have you had a chance to take a look at the recently implemented changes to the turbine engine simulation in SU6? From what I've read so far from other devs it sounds promising:

                  alt text

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                  • J Offline
                    J Offline
                    jmarkows
                    wrote last edited by
                    #15

                    Oh boy, maybe we'll finally be able to increase prop pitch on the TBM without dumping airspeed.

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                    • Black SquareB Black Square

                      I just wanted to let you all know that I have made some notes to myself tonight while working on the King Air regarding this. I think I may have found the issue that's causing it. It can be nearly impossible to coax the exact desired engine behavior out of MSFS, even with corrections applied to every parameter in my current engine simulations. This might have been the result of one of those corrections, but it's very careful work to figure out exactly what's going on, and avoid the risk of upsetting every other data point in the performance tables. I'll let you know what I can find, but I make no promises.

                      P Offline
                      P Offline
                      ProfCrash
                      wrote last edited by
                      #16

                      @Black-Square Looking forward to the update!

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