HIGH-SPEED VESSEL HULL Russian patent published in 1995 - IPC

FIELD: shipbuilding. SUBSTANCE: cylindrical middlebody of bottom is made at divergence angle of its generatrix reaching 5 deg; length of middlebody is equal to 0.01-0.1 of the vessel hull length; point of intersection of lower edge of transom with hull CL is located above BL at distance not exceeding 1.2 of the bilge height above BL in the area of beginning of bottom step; section of bottom between side skegs before transom has deadrise angle changing from 0 to 7 deg and angle of inclination to BL not exceeding 4 deg; width of after-step recess in plane of frames passing over bottom step and side skegs does not exceed its magnitude in plane of transom and angle in plan between flow separating edges of bottom step and side skegs is between 90 and 180 deg. EFFECT: enhanced efficiency. 5 dwg