Evaluation of Resistance Performance of a Motor Boat Using a High-Speed Towing Carriage

초록

Aftermath of Korean War forbids public access to the most part of the nation’s coast until 1988 Seoul Olympic Games. Until now some strategically sensitive beaches are still inaccessible and marine leisure and sports activities are considerably weaker than those based on the land. However, it is foreseeable that the growth of Korean economy and introduction of the 5 days a week working system will accelerate the growth of marine leisure activities and businesses. In an effort to promote marine activities, recently a high-speed powerboat made of fiber-reinforced plastics for family use has been developed with funding from the Ministry of Maritime Affairs and Fisheries of Korea. The resistance characteristics of the boat have been tested at the towing tank of the Seoul National University. The use of Froude’s similitude law may encounter limitations if applied in estimating the resistances of high-speed boats since an ordinary towing tank may be limited in length and carriage speed. Proper instrumentations for efficient data acquisition have to be devised as well. A high-speed carriage has been designed to circumvent the problems. A lightweight cantilever type towing carriage has been installed on the wall of the towing tank. The wireless devices appropriate for data acquisition during high-speed towing tests have been devised also and the integrated system has been validated through a series of comparative tests. With the new carriage system, a series of model tests have been performed to investigate the hydrodynamic properties of the powerboat and compared to the sea trial results.