A system for designing and assembling a ships rudder that allows for the manufacture of the rudder components, namely a rudder stock and rudder blade independently, and assembling them into a completed rudder using retaining bolts and injecting an epoxy like cement or grout in order achieve the required strength characteristics.

A rudder for as ship is described, comprising a rudder blade (10) which is fastened via a rudder stock (32) to the aft end (16) of the ship, where the rudder blade (10) is a rudder blade of the suspension type, comprising a first rudder blade part (12) and a second rudder blade part (14), arranged above and below each other, respectively, the rudder stock (32) is mounted and fastened to the rudder blade (10) and extends up into the aft end (16) of the ship, where the rudder stock is coupled at the upper end to a steering gear (20) arranged at the aft end (16) of the ship. An outer tube (34) is arranged about the rudder stock (32) where the outer tube (34) is fastened in the first, upper rudder blade part (12) and the aft end (16) of the ship, respectively, and that the rudder stock (32) extends through the outer tube (34) and down into the second, lower rudder blade part (14).

A system for designing and assembling a ships rudder that allows for the manufacture of the rudder components, namely a rudder stock and rudder blade independently, and assembling them into a completed rudder using retaining bolts and injecting an epoxy like cement or grout in order achieve the required strength characteristics.

A flexible steering fin and passive cambering keel for sailboats having fundamental simplicity yet enhanced performance and superior operation in terms of design and components. The steering fin is a relatively short and elongated flexible blade with its leading edge fixed beneath the hull. A rod passing through the hull functions as a simple lever controlling the trailing edge of the blade, which provides both tilt and curvature for unique handling and ease of use. A separate flexible keel provides the function of tilting the keel as it is cambered, for greater lift. A unique pivoting resilient steering assembly is incorporated, along with a rotational circular hull section, frame and cam assembly to control the keel.