sea trial testing of optimization of Fuel Consumption and Motor Speed of catamaran vessels Using Hydrofoil

Daily increase in fuel cost and also marine environment pollution tends designers and engineers to design and optimizebased on reducing losses and energy consumption. Reduction of fuel consumption and marine environment pollutionare categorized in high priority problems in design of new vessels and optimization of current ones. Using hydrofoilbetween two hulls is one of the best strategies in optimization cycle of fuel consumption of catamarans. HYSUCATcomes from ‘‘Hydrofoil Supported Catamarans’’ and stands for a vessel which is composed of a catamaran hull andhydrofoils mounted between two hulls. These hydrofoils tolerate part of hull weight in high speed and decrease wettedsurface of vessel. This element reduces drag of vessel and consequently fuel consumption by decreasing the wetted surface. This research deals with determination of a suitable hydrofoil section to reduce drag and increase stability of a catamaran vessel using experimental data. Full-scale foils were constructed and mounted on a vessel in continue, and itsperformance was examined in sea tests. Determining the best section and also the most suitable position for mountingthe foil is a novel study in the field of hydrodynamics of catamaran vessels.