HOW RELIABLE ARE PROPELLERS?

Failure statistics from Lloyd's Register show that for fixed and controllable pitch (cp) propellers, the average incidence of defects is about 0.045 and 0.088 defects per year, respectively, meaning that propellers are generally quite reliable. For the years 1985 through 1988, a table details the relative proportions of the various defects located on fixed pitch propellers, divided into power ranges, and a second table gives the same data for cp propellers. A third table shows how the overall defect incidence, in terms of defects recorded per year, per unit, has changed for the middle power band of fixed pitch and cp propellers. Particulars of some of the defects and damages found over the years are discussed, with special attention to blade stress.

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Filing Info

  • Accession Number: 00660118
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM