Download or read book Hydrodynamic Drag Measurements on SWATH Ship Components written by R. B. Chapman and published by . This book was released on 1974 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.