RUDDER UNIT Russian patent published in 2017 - IPC B63H25/08 B63H5/14 

FIELD: transportation.

SUBSTANCE: rudder device contains a waterway channel, a fixed nozzle of a circular cross section with a scew propeller inside it, balanced rudders, a rudder box with vertical side walls and horizontal links. The rudder stocks are connected to the balanced rudder blades, which contain lower hinges of the rudders. The hinges are fixed to the hull of the craft. The fixed nozzle is rigidly connected to the rudder box by means of the waterway channel of internal variable section, smoothly transforming from the nozzle circle to the rectangle at the beginning of the rudder box, and the blades of all balanced rudders are made with the same areas and set at equal distances from each other. The rudder box consists of the front part and rear part rigidly connected to it by means of the upper and lower horizontal plates. The vertical side walls of both parts of the boxes have the same height, and the horizontal links of the front box side are made shorter than the horizontal links of the rear box side. The upper and lower horizontal plates are made in the form of the same equilateral trapezium. The lower hinges of the rudders are mounted on the lower horizontal plate of the box. The tillers are rigidly fixed to the rudder, mounted at the same angles relative to the planes of the blades symmetry and have equal length, and the lengths of the rigid rods are equal to the distances between the neighboring lower hinges.

EFFECT: reducing the required power of the rudder unit.

3 dwg