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Composite aircraft propeller blade

  • US 4,810,167 A
  • Filed: 12/08/1986
  • Issued: 03/07/1989
  • Est. Priority Date: 12/08/1986
  • Status: Expired due to Term
First Claim
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1. A composite aircraft propeller blade adapted to provide for a smooth transfer of centrifugal and bending forces to a propeller hub member, said propeller blade comprising a rigid base retention plug having a radially inner end surface, a core of spacer material extending outwardly from said base plug and having opposite side surfaces converging together, a series of overlapping plies of resin-bonded fibrous plastics material overlying each of said side surfaces of said core, each of said plies including substantially parallel reinforcing fibers, a resin-bonded outer covering on said overlapping plies and forming the outer surface of said blade, said resin-bonded overlapping plies and outer covering forming leading and trailing blade edge portions projecting substantially forwardly and rearwardly from said base plug, a first portion of said plies and corresponding said reinforcing fibers on both of said side surfaces of said core extending inwardly around said inner end surface of said base plug and being bonded to said inner end surface, and means for securing said base plug to the hub member.

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