Rudder arrangement for ships having higher speeds comprising a cavitation-reducing twisted, in particular balanced rudder
Assigneebecker marine systems GmbH & Co. KG
InventorDirk Lehmann
Life of this patent
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Abstract
The rudder arrangement for ships comprises a twisted and balanced rudder blade having a slender profile and a low profile thickness and comprising a propeller facing the rudder blade. A rudder pipe is located in the upper region of the rudder blade with rudder post located therein, wherein the rudder blade comprises two superposed rudder blade sections having different heights whose front nose strips facing the propeller are offset in such a manner that one nose strip is offset to port or starboard and the other nose strip is offset to starboard or port. The two side wall surfaces of the rudder blade converge into an end strip facing away from the propeller and have different arc profiles.
Claims21
A rudder arrangement for a ship comprising:
- a propeller arranged on a drivable propeller axis for creating propulsion of the ship;
- and
- a rudder blade disposed behind the propeller and in-line with the drivable propeller axis, the rudder blade comprising an upper rudder blade section superposed and fixed relative to a lower rudder blade section about a longitudinal central line, a fastening plate is arranged between and connected to the upper rudder blade section and the lower rudder blade section, wherein the fastening plate has symmetrical cross-sectional surface sections on both sides of the longitudinal central line and a surface profile and dimensions which enclose a base plate of the upper rudder blade section and a cover plate of the lower rudder blade section, where each rudder blade section defines a nose strip and an end strip, where both end strips are aligned and where each nose strip is laterally offset from the longitudinal central line with one to a port and the other to a starboard direction, where a height of the lower rudder blade section is less than a height of the upper rudder blade section, and wherein the rudder blade is a balanced rudder.
Dependencies are inferred from the claim text.