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Plastic-composite profiled girder, in particular a wing spar for aircraft and for wind-turbine rotors

  • US 5,476,704 A
  • Filed: 02/10/1994
  • Issued: 12/19/1995
  • Est. Priority Date: 07/01/1992
  • Status: Expired due to Fees
First Claim
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1. Synthetic resin composite wing spar for aircraft construction comprising at least two premanufactured flanges and at least one premanufactured web interconnecting said flanges, said flanges being manufactured by pultrusion of thermoplastic resin impregnated rovings, both of said flanges being provided with adhesive bonded flanges protruding from the surface of the flanges over part of the height of the web and defining a hollow gap therebetween, said web being manufactured of cured thermoplastic resin impregnated woven or non-woven fabrics and being inserted in said hollow gap of said adhesive bonded flanges of both of the flanges of the wing spar and fixed therein by means of a thixotropic adhesive inserted into said hollow gap of the adhesive bonded flanges, further strips of woven or non-woven fabric are worked into the flanges of the wing spar and extend into the lateral protruding parts of the adhesive bonded flanges.

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