Theoretical and experimental investigation of a catamaran resistance

A comparative theoretical and experimental analysis over catamaran resistance was developed in this paper. The theoretical estimation was performed on the basis of Sahoo method, typical for the round bilge catamarans with high speed. Experimental model tests were developed in the Towing Tank of “Dunarea de Jos” University of Galati, both with the demihull and the full catamaran, with blocked sinkage and trim, to study the influence of the hulls interference. Also, catamaran model tests with free trim were realized. In order to transpose the model results at full scale, the ITTC 1957 method was applied. The conclusions reveal significant differences between the theoretical and experimental results.