Patent ID: 7717052

Claim:
A high performance rudder ( 100 ) for ships, which is configured as a full spade rudder, comprising a rudder blade ( 10 ), a rudder trunk ( 50 ) and a rudder post ( 40 ), the rudder blade ( 10 ) having a leading edge ( 13 ) and a trailing edge ( 18 ), wherein the profile of the rudder blade ( 10 ) widens from a leading edge ( 13 ) in a longitudinal direction of the rudder ( 100 ) to a central area ( 14 ) which is the widest point of the rudder profile, the profile having a first flank angle (α), so that the profile of the rudder blade ( 10 ) tapers from the central area ( 14 ) to a rear area ( 16 ), which constitutes the narrowest point of the rudder profile, and a second flank angle (β), so that the profile of the rudder blade ( 10 ) widens again, in the form of a fishtail, from the rear area ( 16 ) to the trailing edge ( 18 ), and that the rudder trunk ( 50 ) is provided as a cantilever girder with a central inner longitudinal bore ( 52 ) for receiving the rudder post ( 40 ) and extends into the rudder blade ( 10 ), whereby a bearing ( 53 ) is disposed in the inner longitudinal bore ( 52 ) of the rudder trunk ( 50 ) for supporting the rudder post ( 40 ), the rudder trunk ( 50 ) penetrating with its free end ( 51 ) into a recess or taper ( 11 ) in the rudder blade ( 10 ), whereby an end area ( 41 ) of the rudder post ( 40 ) is guided out of the rudder trunk ( 50 ) and is connected with the rudder blade ( 10 ), whereby no bearing is provided between the rudder blade ( 10 ) and the rudder trunk ( 50 ) and whereby the bearing ( 53 ) for supporting the rudder post ( 40 ) is disposed in the rudder trunk ( 50 ) in the area of the free end ( 51 ) of the rudder trunk ( 50 ).