Marine vessel
AssigneeMeyer Turku Oy
InventorRaimo Hämäläinen
Life of this patent
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Abstract
A marine vessel has a hull with a bottom, a bow, a stern, and a propulsion arrangement including at least three propulsion units arranged at the stern of the marine vessel. The marine vessel has a base line and a centerline. The at least three propulsion units include a fixed centerline shaft propulsion unit with a shaft line and a propeller, and two turnable propulsion units with respective propellers and arranged at opposite sides of the fixed centerline shaft propulsion unit for steering of the marine vessel. For improving thrust efficiency, while maintaining optimal steering capability, the propeller of the fixed centerline shaft propulsion unit is arranged at a given distance aft of the stern of the marine vessel.
Claims28
A marine vessel with a hull having a bottom, a bow, and a stern, the marine vessel further including a propulsion arrangement having at least three propulsion units arranged at the stern of the marine vessel, and which marine vessel has a base line and a centerline, wherein the at least three propulsion units include a fixed centerline shaft propulsion unit, with a shaft line and a propeller, for giving thrust in both a forward direction and a backward direction, and two turnable propulsion units with respective propellers and arranged at opposite sides of the fixed centerline shaft propulsion unit for steering of the marine vessel, wherein the propeller of the fixed centerline shaft propulsion unit is arranged at a given distance (D) aft of the stern of the marine vessel.
A propulsion arrangement for a marine vessel, which marine vessel has a hull with a bottom, a bow, a stern, a base line and a centerline, wherein the propulsion arrangement includes at least three propulsion units arranged at the stern of the marine vessel, and wherein the at least three propulsion units include a fixed centerline shaft propulsion unit, with a shaft line and a propeller, for giving thrust in both a forward direction and a backward direction, and two turnable propulsion units with respective propellers arranged at opposite sides of the fixed centerline shaft propulsion unit for steering of the marine vessel, wherein that the propeller of the fixed centerline shaft propulsion unit is arranged at a given distance (D) aft of the stern of the marine vessel.
A method for providing a marine vessel with a propulsion arrangement, which marine vessel has a hull with a bottom, a bow, a stern, a base line and a centerline, in which method the marine vessel is provided with at least three propulsion units at the stern of the marine vessel, wherein in the at least three propulsion units are included a fixed centerline shaft propulsion unit, with a shaft line and a propeller, for giving thrust in both a forward direction and a backward direction, and two turnable propulsion units with respective propellers arranged at opposite sides of the fixed centerline shaft propulsion unit for steering of the marine vessel, wherein the propeller of the centerline shaft propulsion unit is arranged at a given distance (D) aft of the stern of the marine vessel.
Dependencies are inferred from the claim text.