| 摘要 |
<p>The modification of a rudder for boats and ships, comprising a channel or tunnel disposed rearwardly 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 channel, the V-tips lying in the central vertical plane through the channel, such that on each side of this plane, a curved tongue is formed. The front edge of the channel is spaced from the propeller plane so as not to intersect the propeller plane in any rudder position and the two curved tongues are immovable relative to one another. In one embodiment, the channel is arranged in combination with a conventional plate-shaped rudder, one half-section of the channel being arranged on each side of the rudder.</p> |
