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  6. Trim tab animations are wrong

Trim tab animations are wrong

Scheduled Pinned Locked Moved TBM 850
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  • S Offline
    S Offline
    Slowhand
    wrote on last edited by Slowhand
    #1

    The trim tabs for elevator, aileron and rudder trim all move into the wrong direction. They are supposed to move into the opposite direction of the desired deflection of the control surface.
    Elevator trim "up": the trim tab should move down
    Aileron Trim right: the left aileron trim tab should move up (btw. the trim display in the cockpit is wrong, too)
    Rudder trim left: the trim tab should move right

    Apart from the wrong animations the trimming works as it should.

    V 1 Reply Last reply
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    • S Slowhand

      The trim tabs for elevator, aileron and rudder trim all move into the wrong direction. They are supposed to move into the opposite direction of the desired deflection of the control surface.
      Elevator trim "up": the trim tab should move down
      Aileron Trim right: the left aileron trim tab should move up (btw. the trim display in the cockpit is wrong, too)
      Rudder trim left: the trim tab should move right

      Apart from the wrong animations the trimming works as it should.

      V Offline
      V Offline
      Voice of Reason
      JF Staff
      wrote on last edited by
      #2

      @slowhand From the developer...

      'Thank you for pointing these out. I fixed the aileron and rudder animations, but upon review of the POH, I saw that it specifically referred to the elevator trim as "anti-tabs", while the others are referred to as "trim-tabs". If you can provide any evidence of which is the correct behavior for the elevator trim, I will gladly make the change, and thank you for your contribution!'

      Hope that helps.

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      • D Offline
        D Offline
        DanG
        wrote on last edited by
        #3

        The POH refers to the elevator trim-tabs as anti-tabs that are also used as trim-tabs. I'm guessing it's similar to a lot of piper aircraft like the cherokee. You can find a few descriptions and videos of how they work. The trim sets the base position of the tab in the same direction as a normal trim tab and then the tab moves with the elevator in the same direction as the elevator movement to work as an antiservo tab. The way it's currently animated wouldn't work, so just animating the elevator trim as a normal trim tab would be better. Animating the antiservo movement too is probably a bit more work. Wish I could find a video of the TBM elevator moving to confirm some of this.

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