HIGH-SPEED VESSEL HULL Russian patent published in 2000 - IPC

FIELD: shipbuilding; designing ship's lines. SUBSTANCE: hull has bottom with side bilges, planing step, side skegs, after-step groove bounded by edge of planing step and bottom edge of transom. Width of after-step groove in sectional planes running over planing step and skegs does not exceed its magnitude in plane of transom. Middlebody of hull bottom located before groove has from of horseshoe in plan. On side of bow and sides, horseshoe is bounded by line equidistant in way along ship relative to edges of planing step and skegs. Bottom frames running through middlebody (to the left and to the right) have more intensive rise towards side bilges as compared with that within middlebody. Bottom frames within middlebody have form of straight lines or curve lines whose convexity is directed towards base plane of hull. EFFECT: improved operational properties of vessel due to reduction of resistance to her motion and overload in motion in swell. 3 cl, 6 dwg