EXPERIMENTAL INVESTIGATION ON HYDRODYNAMIC PERFORMANCES OF WARPED HARD CHINE DISPLACEMENT HULLFORM

In this paper the results of experimental tests relative to resistance, seakeeping and roll decay of a warped hard chine hull form, suitable for large yacht design are reported. All tests have been carried out at University of Naples, using a scale model of 2.00 m LOA. Resistance tests are performed at FV ranging from 0.90 to 4.14, for three different CG longitudinal positions and results for resistance, sinkage and trim are given. For the most realistic condition dynamic wetted surface is determined separating pressure and whisker spray areas to allow reliable full scale powering predictions. For the same static trim condition, heave, pitch and accelerations have been measured for head sea at FV = 1.35 and 1.89 in regular waves for different L/ratios at constant wave steepness H/ = 1/50. At zero speed roll decay and roll in beam seas were investigated. Results of seakeeping tests are given in standard RAO form.