Wing spar modification kit

CAFC
  • US 6,328,260 B1
  • Filed: 10/25/2000
  • Issued: 12/11/2001
  • Est. Priority Date: 10/25/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. A modification kit for retrofitting a wing spar on an amphibious airplane, said airplane having a root rib, and said wing spar comprising a wing-spar cap angle that is attached to a wing spar web, said wing spar web having an upper edge and a lower edge and an inboard end that attaches to said root rib, a first series of wing-attach bolt-holes that is provided in said upper edge and a second series of wing-attach bolt-holes that is provided in said lower edge of said wing spar web, wherein said root rib is angled relative to a vertical plane of said amphibious airplanes, and wherein said inboard end of said wing spar has an inboard-end angle that corresponds to an angle of said root rib, said modification kit comprising:

  • an upper doubler-strap and an upper filler-strap;

    a lower doubler-strap and a lower filler-strap; and

    a plurality of wing-spar attachment-bolts;

    wherein each said upper filler-strap and each said upper doubler-strap have a third series of wing-attach bolt-holes that corresponds precisely with a first series of wing-attach bolt-holes in an upper edge of a wing spar web, and said lower filler-strap and said lower doubler-strap have a fourth series of wing-attach bolt-holes that corresponds precisely with a second series of wing-attach bolt-holes in a lower edge of said wing spar;

    wherein said upper and said lower doubler-straps have a doubler-protective-coating and said upper and said lower filler-straps have a filler-protective-coating, and wherein said upper doubler-strap has an upper inboard-end angle and said lower doubler-strap has a lower inboard end angle.

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