초록 ▼

A vessel (10) has a semi-displacement or semi-planing round bilge hull (11) characterized by low length-to-beam ratio (between about 5.0 to 7.5) and utilizing hydrodynamic lift. The bottom (15) of the hull (11) rises toward the stern (17) and flattens out at the transom (30). Four waterjet propulsio

A vessel (10) has a semi-displacement or semi-planing round bilge hull (11) characterized by low length-to-beam ratio (between about 5.0 to 7.5) and utilizing hydrodynamic lift. The bottom (15) of the hull (11) rises toward the stern (17) and flattens out at the transom (30). Four waterjet propulsion units (26, 27, 28, 29) are mounted at the transom (30 ) with inlets (31) arranged on the hull bottom (15) just forward of the transom (30) in a high pressure area. Water under high pressure is directed to the pumps (32) from the inlets (31). Eight marine gas turbines arranged in pairs (36/37, 38/39, 40/41, 42/43) power the waterjet propulsion units (26, 27, 28, 29) through combined gearboxes (44, 45, 46, 47) and cardan shafts (48, 49, 50, 51).

대표청구항 ▼

A ship comprising: a hull producing a high pressure area at a bottom portion of a stern which rises from a point of maximum depth forward of a longitudinal center of the hull to a point of minimum draft at a transom with the minimum draft being less than 60 percent of the maximum draft; a width of t

A ship comprising: a hull producing a high pressure area at a bottom portion of a stern which rises from a point of maximum depth forward of a longitudinal center of the hull to a point of minimum draft at a transom with the minimum draft being less than 60 percent of the maximum draft; a width of the stern at a datum waterline being at least 85 percent of a maximum width of the hull at the datum waterline which produces hydrodynamic lifting of the stern at a threshold speed above a length Froude Number of 0.40; the bottom portion having transverse sections which forward of the stern are convexly rounded with reference to a baseline of the ship at the point of conjunction with sides of the hull and which relative to the baseline of the ship are non-concave in section on each side of a keel except for sections within less than 25 percent of a length of the ship aft from a forward perpendicular which are concave and meet the sides of the ship in a knuckle; and sides of the hull at the datum waterline are non-convex in plan with reference to a centerline of the ship and a maximum angle of dead rise of sections at the stern is a maximum of 10 degrees.