| 摘要 |
<p>A modification on a rudder for boats and ships, comprising a channel disposed rearward of the screw which is rotatable about a substantially vertical axis. The channel has a closed, circular cross-sectional configuration. Two V-shaped notches are provided in the rearward end of the tunnel, the V-tips lying in the central vertical plane through the tunnel, such that on each side of this plane, a curved tongue (17) is formed. In one embodiment, the channel can be arranged in connection with a conventional plateshaped rudder (9), one halfsection of the channel being arranged on each side of the rudder. </p> |
