STERN SHAPE OF DISPLACEMENT TYPE SHIP

摘要

Stern shape of a displacement type ship in which hull resistance can be reduced and propeller cavitation can be suppressed in a displacement type ship sailing in such a speed region that the Froude number is smaller than the last hump. The stern shape of a displacement type ship sailing in such a speed region that the Froude number is smaller than the last hump has a knuckle line (14) formed continuously, in the front and back direction of the hull from the start point in front of a propeller to the end point in the rear of the propeller, by connecting knuckle points (13) provided in the cross-sectional profile of the hull at the stern. Frame lines (12a) on the inside of the knuckle line (14) in the width direction of the hull are formed into dome shape having a curvature of upward convexity. Hull length forming the dome shape is set equal to or longer than 10% of the overall length or equal to or longer than one time the propeller diameter, and the position of the start point in the width length of the hull is set on the outside of the radial position of the propeller.