In a 1975 paper, the present Author and Tamiya described an experimental technique they had developed for measuring the spray thickness formed by prismatic planing-form models. In subsequent studies, a water-soluble film was applied to the planing surface to study the frictional drag component, and the location of the spray blister was investigated. The present paper, which includes some theoretical considerations, summarises these studies and their results. It is concluded that the planing resistance estimated with Savitsky's "short form" calculation with frictional drag based on a laminar friction coefficient was in excellent agreement with the resistance measurements. Other conclusions are drawn concerning the spray thickness and other spray characteristics, the presence of extensive laminar flow on the prismatic planing-hull bottom, and on the results obtained with a water-soluble <acetanilid> film pattern used to study the laminar/turbulent transition on the hull bottom <the pattern showed an extensive laminar flow>.

  • Supplemental Notes:
    • J. Ship Res., 27 <1983>, p.187 <Sept.> (10 pp., 23 ref., 4 tab., 4 graphs, 5 diag., 5 phot.)
  • Authors:
    • Latorre, R
  • Publication Date: 1983


  • English

Subject/Index Terms

  • Subject Areas: Marine Transportation;

Filing Info

  • Accession Number: 00685761
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM