Abstract
It is known that a dolphin swims fast and freely in water. The propulsive performance and the kinetic performance of the dolphin are one of great concern among researchers. We paid attention to the dolphin's tail flukes which has an important role to generate propulsive force. So the experiments on both the propulsive force of the outboard propulsor with the oscillating wing which is similar to the dolphin's tail flukes in shape and the velocity of a small boat equipped with the outboard propulsor were carried out. The propulsive performance of the wing was discussed compared with rectangular wings.
