SHIP'S RUDDER Russian patent published in 1997 - IPC

FIELD: shipbuilding. SUBSTANCE: ship's rudder has two-humped profile; contour of convex section in fore portion of profile corresponds to profile of wing whose maximum thickness is located at distance of 0.3 of length of chord between profile and its leading edge; minimum thickness of wing in center concave section does not exceed 0.10-0.15 of maximum thickness of fore convex section and is located at distance equal to 0.78-0.82 from leading edge of profile; tail section has smoothly streamlined convex section rounded off in way of trailing edge whose maximum thickness is located at distance of 0.92-0.95 of length of chord from leading edge and is equal to 0.3-0.4 of maximum thickness of convex fore section of rudder profile; tangent to profile rounding-off curve in trailing edge of profile forms angle together with profile chord which is equal to 60-65 deg. Profile of washers in fore part to section at maximum thickness of profile coincides with contour of rudder and below this section, washers have rectilinear section which does not extend beyond maximum thickness and terminates in smooth rounding-off at trailing edge of rudder profile. EFFECT: enhanced reliability. 2 dwg