DEVICE TO DECREASE ROLL AND INCREASE SEA KEEPING PROPERTIES OF FLIGHT BOATS, LIGHT SHIPS AND HARD-CHINE SHIPS Russian patent published in 2012 - IPC B63B39/06 B63B3/44 

FIELD: transport.

SUBSTANCE: invention relates to ship building, particularly, to passive roll dampers for flight boats, light ships and hard-chine ships. Proposed device comprises passive roll dampers extending beyond ship hull. Said dampers are made up of vertically oriented grid making ship side extensions arranged in stern counter with their length making at least 0.15 of hull length. If necessary, they may be arranged at hull bow section with their length making at least 0.075 of hull length. Besides, they may represent foil posts. Wave load damping grids are made up of separate blocks with height making at least 0.2 of ship mean draft consisting of wing profiles of plates with front edge bent outward through 15-20°. Said wing profiles or plates are reinforced from below and from above by strips with width making 0.15-0.2 of block height welded thereto. Said dampers are welded to ship hull sides and bottom. Stern section of said grids may be used and steering complexes.

EFFECT: notable damping of roll.

2 dwg