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Thread: Pivoting wing tips?

  1. #1
    Formerly Unknown Target Inverted Vantage's Avatar
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    Jun 2008

    Pivoting wing tips?

    Here's a question; why aren't these more commonly used? It seems like it would be easier to attach a tip on the end of a wing as opposed to cutting a section out of an existing wing? At the very least it doesn't seem like there's a very large disadvantage (except maybe control linking and structural strains at the rotational joints) to having the wingtips act as ailerons/elevators?

    As an example;

    Westland-Hill Pterodactyl Mk. IA

  2. #2
    Registered User
    Join Date
    Mar 2007
    Benaraby Queensland Australia

    Re: Pivoting wing tips?

    Looks like big loads on the pivot points would add weight to the design

  3. #3
    Registered User ultralajt's Avatar
    Join Date
    May 2009

    Re: Pivoting wing tips?

    History prooved it to be less apropriate than "ordinary" ailerons, no matter if we look from manufacturing or aerodinamic point of view.
    Never try, never fail.
    Ultralajt Website

  4. #4
    Registered User
    Join Date
    Oct 2009
    Rainbow beach QLD Australia

    Re: Pivoting wing tips?

    If you look at various wing warping systems - from the later Australian Skycraft Scout, Mark Markowski's Eagle and even hang gliders with billow shift, the tips pivot about a point just aft of the LE tube and the remainder of the wing adapts.

    I imagine the system in the picture - and that tested and abandon by the Hortens - uses a pivot point somewhat aft of the LE to provide aerodynamic balance.

    I do know overall wing warping is superior to ailerons but mechanically impractical in a rigid wing - this approximation may have had the problems of one without the benefit of the other.

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