On the Development of a Small Multi- hull Pleasure Fishing Boat

초록

Hull forms and their hydrodynamic characteristics of the multi hull ships including catamarans and trimarans are extensively studied both experimentally and numerically. The spacing between main hull and outriggers and the longitudinal location of the out riggers as well as the shallow water behaviors are carefully studied. Model tests are done at the towing tank of the Inha University and an Euler solver is utilized for the numerical simulations. The results are cross examined to find the optimal size and locations of the outriggers to improve both the motion and resistance characteristics. A 12 m long 9.77 ton class catamaran has been developed and several ships have been already produced and deployed as pleasure fishing boats in the west coast of Korean peninsula. The boats are made of fiber reinforced plastics and equipped with a pair of 280 hp diesel engines and water jet propulsion systems and the maximum speed exceed 25knots after fully loaded. The results of the sea trials are compared to those of model tests. A trimaran having a displacement of 7.0 ton is now being under development at the CTYS, Inha University. The boat will be used also as a pleasure fishing boat in the vicinities of small islands near capital areas and the stability and motion characteristics as well as the speed will be carefully examined in the development stage since the most of its customers would be unacquainted to the marine environment.