Resistance, sinkage, trim and wave pattern resistance were measured at two drafts in tests of a 0.80 block coefficient Series 60 model at the Glasgow University Experiment Tank. All the tests were repeated with each of two different protruding bulbs fitted to the model. Records were also made of the wave profiles produced by the naked hull, the hull and bulb combination and the bulb alone. Calculations were made to estimate the vertical force acting on each bulb. The results confirm previous findings that the addition of a bulb affects viscous as well as wave resistance. The usual assumption that hull and bulb wave profiles may be linearly superimposed to give the wave profile of the hull-bulb combination is found to be invalid for the model tested.

  • Corporate Authors:

    Royal Institution of Naval Architects

    10 Upper Belgrave Street
    ,   United States 
  • Authors:
    • Ferguson, A M
    • Dand, I W
  • Publication Date: 1970-10

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00019382
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Nov 25 1973 12:00AM