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  6. Turbo - No Fuel Flow

Turbo - No Fuel Flow

Scheduled Pinned Locked Moved Commander 114
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  • T Offline
    T Offline
    tttocs
    wrote last edited by
    #28

    I'm thinking this may be temperature related. As I noted earlier, I'd seen the fuel flow gauge begin to respond with longer priming times on the TC. However on my last few flights it has never moved. The difference is the last few flights have been from airports with extremely high (>30c) temps.

    However, even with the hot temps, the engine still starts just as expected with no issues.

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    • V Offline
      V Offline
      Voxen
      wrote last edited by
      #29

      Ok here is another, I think I didnt miss anything this time
      https://share.icloud.com/photos/0cbjo-607vAVAumHSAN5Uezyw

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      • Z Offline
        Z Offline
        Zacke
        wrote last edited by
        #30

        The EDM shows the fuel flow while priming. Even when the ff gauge doesn't.

        Black SquareB 1 Reply Last reply
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        • S Offline
          S Offline
          StefanL85
          wrote last edited by
          #31

          I am having the same issue. No fuel flow indicated at priming and to get the needle moving on ground after startup I have to open the throttle around one quarter. Ambient Temperture is the heat in Europe and I hammered the glass like a crazy person. šŸ˜‰

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          • V Offline
            V Offline
            Voxen
            wrote last edited by
            #32

            This video at 8:45 also demonstrates this quite clearly:
            https://youtu.be/YcCze1mSZ8c?si=hfq2mLXyCGIjfd-R

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            • Z Zacke

              The EDM shows the fuel flow while priming. Even when the ff gauge doesn't.

              Black SquareB Offline
              Black SquareB Offline
              Black Square
              Black Square Developer
              wrote last edited by
              #33

              @Zacke said in Turbo - No Fuel Flow:

              The EDM shows the fuel flow while priming

              Can someone read what the fuel flow is while priming, or what the value of L:BKSQ_FuelFlow_1, GALLONS PER HOUR is?

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              • V Offline
                V Offline
                Voxen
                wrote last edited by Voxen
                #34

                In SPAD.Next data inspection, BKSQ_FuelFlow_1 is not updated at all (value is always 0 and never changes), while priming or when engine is started and pushed up to 20mp.

                GALLONS PER HOUR, I don't find this variable at all.

                Also I noted that once engine is running, the FF needle only start to move around 18mp, not below.

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                • Z Offline
                  Z Offline
                  Zacke
                  wrote last edited by
                  #35

                  6,5 gph on the EDM while priming.

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                  • J Offline
                    J Offline
                    Jonas.MV
                    wrote last edited by
                    #36

                    This might be helpful for troubleshooting: in the stream of pilotdeviation, there was also no fuel flow in the non-turbo version: time index 00:34:40 https://www.twitch.tv/videos/2837089058

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                    • M Online
                      M Online
                      MatzeH84
                      wrote last edited by
                      #37

                      FWIW I see fuel flow on the TN. But the needle is indeed quite sticky.

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                      • R Offline
                        R Offline
                        Ratman
                        wrote last edited by
                        #38

                        I did another test and found something interesting.
                        This time, the fuel flow indication didn't increase again, even after tapping the gauge. The EDM showed that fuel flow was increasing normally, so the engine itself was receiving fuel correctly.
                        Since I had previously completed a flight where the gauge worked as expected, I tried to figure out what was causing the needle to stick. It seems to start sticking at around 16°C. By 20°C, the needle no longer moves upward at all, even if I tap on the gauge.

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                        • V Offline
                          V Offline
                          Voxen
                          wrote last edited by Voxen
                          #39

                          What is strange is that I’m 100% sure to have seen the needle moving as expected at least once, most likely on the very first flight after purchase where I carefully followed the entire checklist.

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                          • Black SquareB Offline
                            Black SquareB Offline
                            Black Square
                            Black Square Developer
                            wrote last edited by
                            #40

                            Hi, everyone. I looked into this more today, and found the obvious: The fuel flow gauge is highly non-linear at the very bottom of its scale. Since these real instruments are full of real mechanical eccentricities, I've just added a little piece of "cheater" code to help boost the fuel flow indication just enough to read on the scale. Hopefully that should help eliminate any confusion.

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                            • Black SquareB Black Square

                              @Woolies Deploying the flight simulation software emergency response team now šŸ™‚

                              999.jpg

                              R Offline
                              R Offline
                              rightseat
                              wrote last edited by
                              #41

                              @Black-Square said in Turbo - No Fuel Flow:

                              @Woolies Deploying the flight simulation software emergency response team now šŸ™‚

                              999.jpg

                              Oh one one eight nine nine nine, eight eight one nine nine, nine one one nine, seven two five . . . . . . three.

                              I love the IT Crowd! šŸ™‚

                              Black SquareB 1 Reply Last reply
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                              • R rightseat

                                @Black-Square said in Turbo - No Fuel Flow:

                                @Woolies Deploying the flight simulation software emergency response team now šŸ™‚

                                999.jpg

                                Oh one one eight nine nine nine, eight eight one nine nine, nine one one nine, seven two five . . . . . . three.

                                I love the IT Crowd! šŸ™‚

                                Black SquareB Offline
                                Black SquareB Offline
                                Black Square
                                Black Square Developer
                                wrote last edited by
                                #42

                                @rightseat Remember: They're not just the emergency services, they're your emergency services šŸ™‚

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                                • V Offline
                                  V Offline
                                  Voxen
                                  wrote last edited by
                                  #43

                                  I just noticed something today. First I started flying the turbo version of the commander and got that fuel flow needle not moving when priming (always). Then I switched to the normal version for a few flights, and there the needle is moving as expected. And today I have done another flight with the TC version and guess what: the needle was moving!
                                  I can't find the logic there, but that is maybe something useful for you.

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                                  • V Offline
                                    V Offline
                                    Voxen
                                    wrote last edited by
                                    #44

                                    Ok so with update 0.1.1 the issue remains. After installing the update and do a first test with the TC it worked fine, the needle was moving as expected. But today it does not. Tried 3 times on 3 new flights and that FF needle is not moving a bit.

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                                    • WooliesW Offline
                                      WooliesW Offline
                                      Woolies
                                      wrote last edited by
                                      #45

                                      The change in new update seems to be good for me. Needle moves in NA and TC no problem.

                                      https://www.twitch.tv/woolies

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