A braided composite spar (10) or preform for a braided composite spar, comprising a plurality of tubular plies of braided fibres, wherein the spar (10) or preform extends lengthwise from a root(10a) to a tip (10b), and the spar or preform has a tapered portion (25) in which each ply has a height which reduces and a width which increases as it extends toward the tip. The spar (10) or preform can be used to provide a tubular main spar for a winglet (5). The winglet (5) also has a front spar (11) with a front spar web (16), an upper front spar cap (17), and a lower front spar cap (18). An upper skin (19) of the winglet (5) is joined to the braided spar (10) and the upper front spar cap (17). A lower skin (20) of the winglet (5) is joined to the braided spar (10) and the lower front spar cap (18).


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    Title :

    Braided composite spar


    Contributors:
    FONG TONY (author) / AXFORD TIMOTHY (author)

    Publication date :

    2015-12-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge / B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS



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    FONG TONY / AXFORD TIMOTHY | European Patent Office | 2016

    Free access