A Note on the Propeller Rotational Speed Increase due to the Propeller Blade Edge Modification

프로펠러 Edge 수정에 의한 프로펠러 회전수 증가에 관한 소고

The cases and the treatments of the rotational speed losses of marine propellers are examined and practical modification methods are discussed. The cutting of the propeller diameter, the modification of propeller pitch and the propeller blade edge modification are briefly reviewed. An example for the propeller blade edge modification, which is regarded to have advantages in cost and workmanship, is presented for a propeller of a large ship.