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Enhancements to engine startup phase

By @nenenui
    2023-02-23 23:03:40.799Z

    I was watching some videos on YouTube and I think I have seen two aspects of the startup process which could be integrated in a future refinement:

    A) Cold engines produce aa lot of white smoke during the startup … I guess mainly because the combustion chambers are cold and so the combustion is not perfect.

    B) The angle of the blades seem less steep then in the v1.1.2 … it seems to me like the highly twisted inner part of the blade is located higher up … and the blade tip almost seems to be pointing downwards and is not leveled

    The (B) aspect also makes sense to me, as the downwash must be very high in the V-22 and during the startup that aspect most likely needs to be reduced as much as possible (to protect the ground crew etc.)

    PS: The video is here … https://www.youtube.com/watch?v=MNEIgklBTSg

    • 6 replies
    1. @nenenui
        2023-02-23 23:07:28.195Z

        … and this video

        also seems to show the blade tips pointing slightly downwards in "idle" or "stop".

        Are there any V-22 crew people in this forum which could confirm this observation?

        1. In reply tonenenui:
          @nenenui
            2023-02-23 23:21:30.659Z

            and here at 0:17 …

            one can see how the blades tilt (slightly) into the idle position after the nacelles have reach the "90 deg" startup position.

            1. In reply tonenenui:

              Added to the list

              1. A
                In reply tonenenui:
                @Atrius
                  2023-03-05 13:07:34.145Z

                  Just created an account to say that the smoke on start would be amazing. Really hope this will be implemented to the otherwise great product soon :)

                  1. In reply tonenenui:

                    After looking into these features, it was decided that neither of these will be implemented. We do not have enough information on the blade design to accurately model the blades, and the models must have a very specific shape so they fold nicely. As for the smoke on the engines, this effect cannot be modeled nicely in MSFS. Effects in MSFS move linearly, so it would appear as a jet of smoke going straight down, or smoke cutting through the nacelles. The result doesn't look nice.

                    1. @nenenui
                        2023-03-22 08:14:33.244Z

                        I understand the smoke problems you are describing.

                        But allow me to rephrase my original "rotor blade" proposal, because reading your reply I feel like I did a poor job in my first attempt to explain it correctly.

                        First some clarification … I was not proposing to remodel the blades (which must be a lot of work indeed).

                        My (maybe incorrect) assumptions have been:

                        • The angle of the rotor blades is controlled by some internal V22 sim state value (and therefore is easy to change within the sim)
                          • … so now in "idle" they are at say zero deg
                          • … when transitioning to the fold process position they slowly change to … say 30 deg

                        If the "zero to 30 deg" animation is "pre-baked" and not sim-value driven then adjusting the zero angle is clearly way more complex then I assumed.

                        I was thinking that adjusting the blade "idle" angle from zero to say minus 10 deg would be closer to the real "idle" position.

                        However … with such an adjustment there are now followup questions / choices.

                        A) During the rotor spin up there seems to be a shift from "real 3D objects" to some "motion blur rendering"

                        • During the "real object" rotation (= low RPM) the minus 10 deg angle would still make sense

                        • During the "high RPM" flight animation … the present zero deg makes sense

                        If there are sim values controlling the angle, then it could allow add to the realism of the V22 if the angle, during spin up, would slowly adjust from the idle start angle to the flight angle during spin up (so the blade angle being a function of the RPM) while there are still real 3D objects at display (so prior to the blur phase)

                        So in short what I was thinking …

                        • keep that blade 3D model exactly as it is
                        • but slightly adjust the angle towards the rotor base during idle phase
                      • Progress
                        with doing this idea
                      • @MiltechSimulations closed this topic 2023-02-24 21:28:55.049Z.