Abstract
For this paper, the authors designed three types of SURFACE PIERCING PROPELLERS. Each propeller was constructed with a different type of blade section, one wedge-shaped, one crescent-shaped, and one with an improved wedge shape. We checked the propeller's performance around the planned ship speed and also the performance in the astern direction. In order to study the possibility for improvement in lowermedium speed performance, additional model tests were conducted with the submersion ratio, which strongly influences lower-midium performance, changed. Lastly, the authors verified that in an actual vessel, where the submersion ratio can be adjusted by changing the propeller shaft's inclination angle, the performance of the SURFACE PIERCING PROPELLER was improved.
