Plan view down the rudder stock showing handle which actuates attitude of the trim 'tab'.
View to show the hollow taper section of the rudder blade.
Detail of the trim tabs and a view of the ballancing 'box' from which they trail. The box section again
adding buoyancy to the whole.
The back of the boat approaches in section if not exactly in profile a likeness to a fish tail and of course with little inherent buoyancy. To solve this in some small degree I have made the bulk of the rudder blade hollow section and added horizontal trim blades to adjust the lengthwise attitude of the boat to the waterline whilst the boat is moving. It can be seen that in side elevation the boat’s adjustment in this matter will a point of rotation well forward where there is maximum flotation effect.
The adjustment of the trim blades shown here is actuated by a tubular shaft through the rudder post and on a sliding screw and handle mounting on top of the rudder post and easily accessible by the helmsman as needed.
