Patent ID: 8091498

Claim:
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.