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  6. What's this alarm - quiet beeps every second?

What's this alarm - quiet beeps every second?

Scheduled Pinned Locked Moved TBM 850
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  • Q Offline
    Q Offline
    quba
    wrote on last edited by
    #1

    A few times I have heard in the cockpit an aural alarm that consists of rather quiet and subtle (not annoying like other alarms) "beeps" every second and I have no idea what it informs about.

    During that alarm nothing in the cockpit is obviously wrong, no warning lights and everything functions as intended. I initially thought it's a landing gear alarm as it was present when I did approach without landing gear out. But today it appeared on ground at some point after start and stopped when I took off.

    I also couldn't find any mention of an alarm like that in POH.

    I will try to provide recording at some point but it might be difficult for me to reproduce. But maybe someone knows the alarm by description?

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    • M Offline
      M Offline
      meh1951
      wrote on last edited by
      #2

      Radio Altimeter maybe?

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      • Q Offline
        Q Offline
        quba
        wrote on last edited by
        #3

        I managed to record the alarm - video. It's audible on ground with strobe and radio master turned on (irregardless of engine state). I can't tell if it stays on after take-off due to wind noise. I don't think it's a noise of eg. some strobe motor because with Radio Master off strobe light flashes the same way but this alarm disappears.

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        • L Offline
          L Offline
          Luke
          wrote on last edited by
          #4

          It’s the sound of the strobe charging before discharging. It’s a nice detail!

          Q 1 Reply Last reply
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          • L Luke

            It’s the sound of the strobe charging before discharging. It’s a nice detail!

            Q Offline
            Q Offline
            quba
            wrote on last edited by
            #5

            @Luke Oh wow, that's a nice detail indeed! And I feel a little dumb now. Do you know why the sound disappears with Radio Master off even though the light stays on? Is it a bug or something?

            sg_aviationS 1 Reply Last reply
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            • Q quba

              @Luke Oh wow, that's a nice detail indeed! And I feel a little dumb now. Do you know why the sound disappears with Radio Master off even though the light stays on? Is it a bug or something?

              sg_aviationS Offline
              sg_aviationS Offline
              sg_aviation
              wrote on last edited by
              #6

              @quba The sound comes from the interference with the radios. You basically hear the electrical charging.

              In this sense it's not a bug and disappears with radios off.

              BTW, there's a series of short Youtube tutorials by Just Flight on their product side, explaining this.

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              • Black SquareB Offline
                Black SquareB Offline
                Black Square
                Black Square Developer
                wrote on last edited by
                #7

                That is indeed the sound. Excellent explanation. Thank you :)

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                • M Offline
                  M Offline
                  Mad_X
                  wrote on last edited by
                  #8

                  What I don’t get is: I don’t have that sound. Never heard it. I know is should be there but for me there is nothing. Begs the question, what other sounds am I missing that would enhance the simulation? We know the engine sound could be better but on my end it seems the sounds are just dull, which I know should not be the case. I am the one not having missing least this sound piece?

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