Accession Number : AD0784981

Title :   Hydrodynamic Drag Measurements on SWATH Ship Components.

Descriptive Note : Technical paper, Nov 71-May 72,

Corporate Author : NAVAL UNDERSEA CENTER SAN DIEGO CALIF

Personal Author(s) : Chapman,R. B.

Report Date : JUL 1974

Pagination or Media Count : 36

Abstract : Experimental results are reported for hydrodynamic drag measurements on small waterplane area twin hull (SWATH) ship components. Measurements are made for parabolic struts alone, in tandem, and in various combinations with the cylindrical hulls. Interference effects between components are deduced from these data and compared with theoretical predictions. Two SWATH models were tested, both without fins and fully appended while restrained in pitch and heave. Added drag caused by fins required to counter the heave force and trim moment was calculated theoretically.

Descriptors :   *Ships, *Hydrodynamics, Cylindrical bodies, Drag, Measurement, Hulls(Marine), Struts, Model tests, Fins

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE