HIGH-SPEED VESSEL Russian patent published in 2001 - IPC

FIELD: shipbuilding; designing ships and boats with air cavity on bottom. SUBSTANCE: high-speed vessel has hull with side skegs bounding the recess in bottom for air cavity and water-jet propellers. Nozzles with vented wheels and impellers of water-jet propellers are secured after transom in such position that lower edge of nozzle projects under dome of recess on bottom in the amount of from 10 to 80% of nozzle diameter. Water conduit tunnels have upper dome in form of cylindrical surface smoothly raising along hull with convexity downward from dome of bottom recess as far as transom. Hydrodynamic washers in form of pointed plates are fitted at areas where side walls of tunnel come to dome of bottom recess. EFFECT: improved propulsive properties of vessel. 5 dwg