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RPM

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    RPM

    He guys, trying to learn RPM control. Currently doing runup and testing the different prop features. However I did something and now engine 1 RPM won't behave.

    As you can see in the screenshot, it's RPM is much higher. When I pull the prop lever back, nothing happens. And it's light stays blue. I tried pressing the resync button but nothing happens.

    1-rps.jpg
    Attached Files
    Daniel Lucas - KLOU
    i9-10900K 32GB RTX3090
    PPL SEL (SR22)

    #2
    I had that happen once. I quit MSFS and it never happened again.

    Although the POH has detailed prop sync check instructions, PMDG could not or did not for whatever reason include individual prop control so when you get to the parts that are about increasing or decreasing individual prop RPM within the synchronization band this is not simulated. The only prop control we have is the master "cue stick" and the reverser bar.

    My routine prop check is to start with throttles all the way closed to idle and select reverse pitch, and then run up the RPM to 1500 to check operation. On returning to idle the props will come out of reverse. Next check is at 1500 RPM where the master prop control is pulled all the way aft and the RPM should decrease to about 1250 and return to 1500 when master is moved forward. That's about all the control you have, and I think it is a MSFS limitation because I've seen band limiting in the XPlane version years ago.

    Also, always make sure you repair the props if they start doing odd things.
    Dan Downs KCRP
    i7-10700K 32GB 3600MHz 2080Ti

    Comment


      #3
      Originally posted by DDowns View Post
      I had that happen once. I quit MSFS and it never happened again.

      Although the POH has detailed prop sync check instructions, PMDG could not or did not for whatever reason include individual prop control so when you get to the parts that are about increasing or decreasing individual prop RPM within the synchronization band this is not simulated. The only prop control we have is the master "cue stick" and the reverser bar.

      My routine prop check is to start with throttles all the way closed to idle and select reverse pitch, and then run up the RPM to 1500 to check operation. On returning to idle the props will come out of reverse. Next check is at 1500 RPM where the master prop control is pulled all the way aft and the RPM should decrease to about 1250 and return to 1500 when master is moved forward. That's about all the control you have, and I think it is a MSFS limitation because I've seen band limiting in the XPlane version years ago.

      Also, always make sure you repair the props if they start doing odd things.
      hmm, are you positive this is true? I'm watching Tutorial 6 video ((4) PMDG DC-6 Tutorial 8: Engine Runup - YouTube) and it's showing individual prop control using the little switches. I was also able to get a single engine RPM to drop or raise by flipping them. I was on engine 1 when it went haywire,
      Daniel Lucas - KLOU
      i9-10900K 32GB RTX3090
      PPL SEL (SR22)

      Comment


        #4
        The individual prop controls are not operating. This is known
        Chris Makris (Olympic260)
        PMDG Technical Support
        http://www.pmdg.com

        Comment


          #5
          Originally posted by cmakris View Post
          The individual prop controls are not operating. This is known
          can you please explain. I was following the tutorial and can get each prop to lower rpm individually by flipping the switches. Does this break the sim or something?

          in Screenshot i flip engine 3 prop switch down and after about 5 seconds prop 3's RPM drops

          1-prodown.jpg
          Daniel Lucas - KLOU
          i9-10900K 32GB RTX3090
          PPL SEL (SR22)

          Comment


            #6
            Originally posted by dresoccer4 View Post

            can you please explain. I was following the tutorial and can get each prop to lower rpm individually by flipping the switches. Does this break the sim or something?

            in Screenshot i flip engine 3 prop switch down and after about 5 seconds prop 3's RPM drops

            1-prodown.jpg
            Last time I checked the individiual prop switches were not working at all here, so can not say. But since there is a known issue with them I would say this is plausible.
            Chris Makris (Olympic260)
            PMDG Technical Support
            http://www.pmdg.com

            Comment


              #7
              If one engine is at a higher rpm than the others, sometimes it helps to pull out the feather button for that engine.
              Mitch Loescher

              Comment


                #8
                Originally posted by dresoccer4 View Post
                He guys, trying to learn RPM control. Currently doing runup and testing the different prop features. However I did something and now engine 1 RPM won't behave.

                As you can see in the screenshot, it's RPM is much higher. When I pull the prop lever back, nothing happens. And it's light stays blue. I tried pressing the resync button but nothing happens
                The prop feather functions screws me almost every flight. Especially when shifting to high SC gear, regularly the first engine I switch will feather it's prop. Then you pull those red shining feather buttons to make it behave again. I find it best shutting off the auto-feather feature althogether.

                Cheers,
                Florian Steiner

                Comment


                • DDowns
                  DDowns commented
                  Editing a comment
                  Autofeather should be turned off immediately after raising gear and flaps, you can get away with reducing power to METO beforehand but any significant decrease in power will trigger the autofeather. It's only use is for takeoffs when you are busy in a critical phase of flight.
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