HIGH-SPEED GLIDING BOAT Russian patent published in 2010 - IPC B63B1/18 B63H11/08 B63B1/38 

FIELD: transport.

SUBSTANCE: boat with air cavity in its bottom and half-tunnel board channels-waterducts has main marine engines, propeller shafts, brackets, propeller screws, ring packings of screws and rudders. Two main engines with propeller shafts are installed on boat by boards at angles to in vertical and horizontal planes. Channel-waterduct is located in quarter at each board and has at its top the shape close to circumference with radius R=0.5D+(0.02÷0.03) m, where D - diametre of propeller screw, and cambered walls limiting channel-waterduct in vertical plane. Upper part of channel-waterduct from point on transom with height from the main plane H=D+(0.1÷0.2) m to point on the main plane at distance L=(2.5÷3.5)D m from transom passes into hull skeg and changes by parabolic relation, in quarter near transom is separated by projection formed by inner board wall of channel-waterduct and board plane which projection is limited from below by inclined section located at an angle of 5-10° to the main plane. Ring packing is located in the zone of propeller screw and rigidly connected with hull. Axis of this packing lays in the plane parallel to diametrical plane of hull. Propeller shaft goes at angles to the main plane and diametrical plane with such location of propeller screw on it that in the top point screw blades are in the plane of rear edge of ring packing.

EFFECT: invention makes possible to simplify mounting of propeller screw and reduce vibration transferred to hull.

3 cl, 9 dwg