Abstract
The oar of Japanese traditional boat resembles the fin of fish, compared the oar of the European boat to the crawl of the swimming. A human power promotion method of a Japanese traditional boat has high efficiency in comparison with other human power promotion methods. The reason why the human power promotion method of a Japanese traditional boat has high efficiency is to use lifting force as propulsive force. In this study, we manufactured a small model of the Japanese traditional boat for experiment to examine the specification of the boat. Propulsive force and propulsive speed of the model have been measured. In addition, by using PIV measurement and CFD analysis of water flow around oar, we investigated about four oar types.
