C.P. PROPELLER DESIGN CONSIDERATIONS IN RESPECT OF VIBRATORY LOADS

In this paper the Author, of Escher-Wyss GmbH, discusses problems in the design of controllable-pitch propellers. These are characterised by the fact that, in an adverse environment, a mechanism must be provided within the confined diameter of a hub capable of changing the configuration of the blades, transforming large amounts of energy in the process. Furthermore, the inflow to the propeller is inherently non-uniform, subjecting the CPP to major vibratory loads, and these wake field induced forces are of major importance when evaluating design concepts. Two essentially different concepts are available for CPP design, the main difference being the blade bearing system, which can be either of the collar or trunnion type. The advantages of the latter type which is exclusively used by Escher-Wyss are discussed and an outline is given of the Company's program for the computation of wake-field induced forces. Order from BSRA as No. 51,194.

  • Supplemental Notes:
    • Paper presented 13 December 1977.
  • Corporate Authors:

    Institute of Marine Engineers

    Memorial Building, 76 Mark Lane
    London EC3R 7JN,   England 
  • Authors:
    • Wuhrer, W
  • Publication Date: 1977

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00308242
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: Feb 27 1980 12:00AM