Hull Form Development and Powering Performance Characteristics for a 2,500ton Class Trimaran

This chapter presents the results of hull form design and powering performance for a 2,500 ton class trimaran. A series of resistance tests and numerical calculations were conducted to figure out the influence of side-hull forms, longitudinal, and transverse locations on the resistance characteristics of the trimaran. The propulsion test was conducted to investigate the propulsion efficiency of the trimaran, and the powering performance of the trimaran was compared with that of the similar mono-hull ships in full scale. The longitudinal location of side-hull has a large influence on the wave resistance of the trimaran, while the side-hull form and transverse location has a small influence on it. The symmetry side-hull shows comparatively good performance on wave resistance among three kinds of side-hull forms. The optimum location of side-hull is changed according to the ship's speed. Then the optimum location moves to the stem or stern part as the trimaran runs fast. The trimaran shows favorable resistance performance when the side-hull stem is located near the primary wave hollow generated by the main hull.