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Thread: Trim tab question

  1. #1

    Trim tab question

    Group,

    I have a 1980 Sundowner. I noticed after landing that the trim
    indicator is more toward the nose down position and the actual trim
    tab on the stabilitor is slighlty in the down position as well. In
    fact the only way I can get the tab nearly level with the stabilitor
    on the ground is to move the trim wheel full foward. Plan flies fine
    but did not know is this is normal. Looks like the tab only moves
    level to down............never up in reference to the stabilitor.

    Al






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  2. #2

    Trim tab question

    >I have a 1980 Sundowner. I noticed after landing that the trim
    >indicator is more toward the nose down position and the actual trim
    >tab on the stabilitor is slighlty in the down position as well. In
    >fact the only way I can get the tab nearly level with the stabilitor
    >on the ground is to move the trim wheel full foward. Plan flies fine
    >but did not know is this is normal. Looks like the tab only moves
    >level to down............never up in reference to the stabilitor.
    >Al

    The trim tab is geared and does not move at the same rate as the
    stabilator. Thus, depending on the position of the trim wheel and the
    position of the stabilizer, the trim tab can vary widely.

    Try it. Move the stab up and down by hand, and see the trim tab move
    relative to the stab.

    You may in fact have an out of adjustment issue, but it MIGHT only be an
    optical illusion, and the tab is right where its supposed to be.

    Bob Steward, A&P IA
    Birmingham, AL




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  3. #3

    Trim tab question

    Do a BAC search on "play in elevator trim", or "anti servo tab". Lots of info there that will explain all this and more.

    ----- Original Message -----
    From: Al ODonnell
    To: musketeermail@yahoogroups.com
    Sent: Tuesday, May 10, 2005 9:12 PM
    Subject: [musketeermail] Trim tab question


    Group,

    I have a 1980 Sundowner. I noticed after landing that the trim
    indicator is more toward the nose down position and the actual trim
    tab on the stabilitor is slighlty in the down position as well. In
    fact the only way I can get the tab nearly level with the stabilitor
    on the ground is to move the trim wheel full foward. Plan flies fine
    but did not know is this is normal. Looks like the tab only moves
    level to down............never up in reference to the stabilitor.

    Al

    [Non-text portions of this message have been removed]



    ------------------------ Yahoo! Groups Sponsor --------------------~-->
    Help save the life of a child. Support St. Jude Children's Research Hospital's
    'Thanks & Giving.'
    http://us.click.yahoo.com/6iY7fA/5Wn...ZIAA/SyTolB/TM
    --------------------------------------------------------------------~->

    Join BAC today and be a part of the ONLY Type Club for the Musketeer series!

    www.beechaeroclub.org


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    <*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/musketeermail/

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