| 摘要 |
<p>A rudder for a watercraft comprising two or more substantially vertical rudder blades (1, 2) positioned one after the other in the longitudinal direction of the craft. The rudder blades are fastened to two substantially horizontal end plates, an upper plate (3) and a lower plate (4). The fastening of the rudder blades to the end plates is made in such a manner that one or more slits (5) are formed between the rudder blades. The design of the rudder blades is based on known foil sections (as, for example, NACA sections) which can be adapted to meet various criteria. The upper end plate may, if necessary, be dimensioned for transmitting the moment from the rudder stock (6) to the rudder blades (1, 2).</p> |
