| 摘要 |
PROBLEM TO BE SOLVED: To provide a propeller made of composite materials with a built-up blades that can prevent propulsion performance from decreasing by shortening length between a stern and the propeller to easily pull the propeller from a propeller shaft in maintenance thereof or the like.SOLUTION: In the marine propeller, blades 4 made of lightweight materials are built-up type blades independent from a propeller boss 3, and positions of the blades can be shifted further toward the rear than positions of the blades of a usual integrated propeller boss to be attached to and detached from the propeller boss. |
