As mentioned in previous posts, we are planning to install transmission steering. One of the other advantages of transmission steering, (over pull-pull cable or hydraulic steering) is the mechanical advantage that can be achieved using wide angle geometry. Basically, the principle lies in the difference in lever arm lengths between the reduction gear box (right in the picture) and the rudder post tiller arm (left). The reduction gear tiller arm can swing through an arc of about 120 (60 degrees port and starboard) degrees. The typical ‘useful’ full swing of a rudder is about 72 (36 degrees port and starboard) degrees. By aligning the reduction gear, with the tiller, such that are linked in the “full swing” position, something mechanically interesting happens.