| 摘要 |
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 has a centre line which extends lengthwise from a root (10a) to a tip (10b), and at least part of the centre line follows a curved path which does not lie in a single plane. 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). |
