Why does washout promote roll stability?

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  • #40518
    Anonymous
    Inactive

    Why does washout promote roll stability or reduce spiral instability?

    A little bird told me you free-flighters were the smartest ones around and most likely able to shed some light on this, if it is indeed true.

    Also why does washin tend to promote spiral instability?

    To keep things from being too easy, let’s assume that we are trimmed to fly fast enough that no part of the wing is in danger of stalling.

    Please don’t hesitate to pull out all the stops and consider all relevant variables, I have a semi-solid background in basic stability and control issues…or just give the basic idea…

    Directions to other on-line or off-line resources that bear on this question would be welcome as well…

    Thanx much…

    Steve

    visit http://www.aeroexperiments.org

    #43531
    Dean McGinnes
    Participant
    steves wrote:
    Why does washout promote roll stability or reduce spiral instability?

    Because it has no choice to do otherwise!! 😉 😉

    #43532
    DAN BERRY
    Participant

    I always thought it was to make the tips stall after the center of the wing-sort of a marble in a bowl effect. This certainly makes sense, however, I recently read that airflow across a wing naturally produces its own wash-IN. Thusly, you need to build in some wash-out to counteract nature. I dint usta do the washout thing. Now I do. The planes fly better. Amazing. I guess all those guys knew what they were doing!

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