METHOD OF BREAKING ICE, SHIP WITH ENGINE AND METHOD AND ITS APPLICATION Russian patent published in 2011 - IPC B63B35/08 

FIELD: transport.

SUBSTANCE: ice breaking by three-hulled ship consists in that lateral hulls displaced backward relative to central hull collide with ice notably latter than central hull bow. Lateral hulls bend ice downward to break it on sides of central hull to make broken passage with width, in fact, equal to that of three-hulled ship. Low-gradient bow of central hull may move on ice with three-hulled ship bow section keel being the first to collide with ice making a line therein along which ice starts breaking. Thereafter central hull collides with ice to break and pushing it mainly downward. Ice may break up on area in fact equal to width of central hull. Proposed three-hulled ship features lateral hulls displaced backward relative to central hull bow. Lateral hulls bend ice downward to break it on sides of central hull to make broken passage.

EFFECT: reduced wave resistance and ship friction, lower power consumption.

13 cl, 4 dwg