Normal-profile rudder convertible to hollow-flanking type - has profile attachments on trailing edge, and laterally-projecting horizontal fins at top and bottom

摘要

The rudder is constructed as a normal-profile type, but has attachments on its trailing edge by which it can partly be converted into a hollow-flanking rudder. The attachments comprise profile members arranged at approximately half the rudder height and on opposite sides of the trailing edge, so that the rudder forms with each rudder part a curved rudder axis, of which one ends on the left-hand side and the other on the right. It is thus possible to convert (from the outset or subsequently) a normal-displacement rudder into a twisted rudder with bent or curved axis by one-sided, asymmetrical attachments in the rear rudder part. The attachments may be limited by outboard fins fitted to the top and bottom of the rudder.