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  6. Failure Timer Seems To Run When Aircraft Is Idle?

Failure Timer Seems To Run When Aircraft Is Idle?

Scheduled Pinned Locked Moved Piston & Turbine Dukes
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  • Black SquareB Offline
    Black SquareB Offline
    Black Square
    Black Square Developer
    wrote last edited by
    #2

    There is a reason private aircraft inspections are based on calendar months, and not the number of hours flown 🙂 This is also why I chose the MTBF method for my failures, rather than wear based only on time in service. The latter is not really reflective of what you see in the real world. As any boat or aircraft owner can tell you, things will break the moment you take your eyes off the vehicle.

    You will notice that, despite new failures be generated, they do not take immediate effect. For instance, an electrical circuit failure does not cause the circuit breaker to pop out while the aircraft is shut down. Only when you power up the aircraft and activate that system will you see the consequences of the failures that happened since your last flight.

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    • B Offline
      B Offline
      Buzz
      wrote last edited by Buzz
      #3
      This post is deleted!
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      • Black SquareB Black Square

        There is a reason private aircraft inspections are based on calendar months, and not the number of hours flown 🙂 This is also why I chose the MTBF method for my failures, rather than wear based only on time in service. The latter is not really reflective of what you see in the real world. As any boat or aircraft owner can tell you, things will break the moment you take your eyes off the vehicle.

        You will notice that, despite new failures be generated, they do not take immediate effect. For instance, an electrical circuit failure does not cause the circuit breaker to pop out while the aircraft is shut down. Only when you power up the aircraft and activate that system will you see the consequences of the failures that happened since your last flight.

        B Offline
        B Offline
        Buzz
        wrote last edited by
        #4

        @Black-Square
        Ok, by design. Thanks for the answer.

        But on that note, sure the Annual, the Pitot Static, the Transponder and the ELT is based on calendar months, but the 50, 100 hour and phase checks are all tach time.

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        • B Buzz

          @Black-Square
          Ok, by design. Thanks for the answer.

          But on that note, sure the Annual, the Pitot Static, the Transponder and the ELT is based on calendar months, but the 50, 100 hour and phase checks are all tach time.

          Black SquareB Offline
          Black SquareB Offline
          Black Square
          Black Square Developer
          wrote last edited by
          #5

          @Buzz Which is why your engine condition and catastrophic engine failure rates are also based on time in service 🙂

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          • Black SquareB Black Square

            @Buzz Which is why your engine condition and catastrophic engine failure rates are also based on time in service 🙂

            B Offline
            B Offline
            Buzz
            wrote last edited by
            #6

            @Black-Square
            Honestly, I haven't noticed engine condition degradation (As viewed on the tablet) as long as you sim the addon within the limitations and this is with failure acceleration at 50%. Does the failure rate multiplier increase the rate of engine wear?

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

              It does not increase the rate of mismanagement engine condition, but it does increase the rate of catastrophic engine failures.

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              • Black SquareB Black Square

                It does not increase the rate of mismanagement engine condition, but it does increase the rate of catastrophic engine failures.

                B Offline
                B Offline
                Buzz
                wrote last edited by
                #8

                @Black-Square Thanks!

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                • B Offline
                  B Offline
                  Buzz
                  wrote last edited by Buzz
                  #9

                  @Black-Square So, if someone were to fly the addon for, let's say, 1600 hours (these engines rarely made it past TBO without a top overhaul), while never mismanaging the engine and staying within operating limitations, would the condition of the engines remain at 100%?

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                  • Black SquareB Offline
                    Black SquareB Offline
                    Black Square
                    Black Square Developer
                    wrote last edited by
                    #10

                    The condition would remain at 100%, but the probability of a MTBF failure in that time would still likely produce a catastrophic loss of power with continued operation. If you wanted to simulate a less reliable engine, you could lower the MTBF intervals on the failures page for the catastrophic engine failures, while keeping the rest of the failures at their default rate.

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                    • Black SquareB Black Square

                      The condition would remain at 100%, but the probability of a MTBF failure in that time would still likely produce a catastrophic loss of power with continued operation. If you wanted to simulate a less reliable engine, you could lower the MTBF intervals on the failures page for the catastrophic engine failures, while keeping the rest of the failures at their default rate.

                      B Offline
                      B Offline
                      Buzz
                      wrote last edited by
                      #11

                      @Black-Square
                      Ok, noted. But actually, what I was hoping for was over the course of normal engine use was to see an increase in engine wear that would cause the usual symptoms of an engine approaching mid-time to TBO. Maybe an increase in temps, dropping oil pressure over time, a prop governor reacting slower, a gradual but subtle loss of compression (Power) etc.. This would give the user a better reason to pay attention to the engine trend monitor. Maybe even some engine asymmetry. For a future feature, maybe having an option that allows the user to hide the failures and engine conditions in the tablet to use the runup and aircraft performance trend to decide when to rebuild or reset the engine condition.

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