(19)
(11)EP 3 584 067 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
29.04.2020 Bulletin 2020/18

(43)Date of publication A2:
25.12.2019 Bulletin 2019/52

(21)Application number: 19189692.7

(22)Date of filing:  06.02.2017
(51)Int. Cl.: 
B29C 70/54  (2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 08.02.2016 US 201662292718 P

(62)Application number of the earlier application in accordance with Art. 76 EPC:
17154892.8 / 3202660

(71)Applicant: Bell Helicopter Textron Inc.
Fort Worth, TX 76101 (US)

(72)Inventors:
  • CARLSON, David G.
    Fort Worth, TX Texas 76101 (US)
  • McCULLOUGH, John R.
    Fort Worth, TX Texas 76101 (US)
  • DECKER, George R.
    Fort Worth, TX Texas 76101 (US)
  • WOLFE, Douglas K.
    Fort Worth, TX Texas 76101 (US)
  • STANNEY, Keith A.
    Fort Worth, TX Texas 76101 (US)

(74)Representative: Barker Brettell LLP 
100 Hagley Road Edgbaston
Birmingham B16 8QQ
Birmingham B16 8QQ (GB)

  


(54)COMPOSITE WING STRUCTURE AND METHODS OF MANUFACTURE


(57) A method of manufacturing a tiltrotor wing structure (109) including providing a spar mold (402) having a plurality of bores (410) extending from an exterior surface (402e) of the mold (402) to an interior surface (402i) of the mold (402), the plurality of bores (410) corresponding to a plurality of primary coordination holes (422) in a spar member (418), the spar mold (402) having a periphery (406p) defined by a top edge (406t), a bottom edge (406b) and outboard ends (406c, 406d); selecting a plurality of resin impregnated plies (412) to ensure that the plies (412) continuously extend beyond the periphery (406p) of the spar mold (402); laying the plies (412) in the spar mold (402); curing the plies (412) in the mold (402) to form a cured spar member (418) that extends beyond the periphery (406p) of the spar mold (402); and accurately drilling a plurality of primary coordination holes (422) in the cured spar member (418) in the spar mold (402) using a tool (417) positioned in the plurality of bores (410).