Ice load reduction device for ship propellers

Details Ice load reduction device for ship propellers Ice load reduction device for ship propellers

B - Operations, Transporting

63

H

B63H 1/26 (2006.01)

Patent

CA 2100140

Abstract The propellers of an ice-breaking ship can experience very large forces when they contact submerged blocks of ice. The leading edge of a propeller is smoothly rounded to permit it to move easily through the water. This means that the propeller is a very blunt object, ill- suited to cutting ice. As a result ice forces can be very high and propellers on ice-breaking ships are built thicker and stronger than those on open-water ships. In this invention, special devices are fitted to the blades of an ice-worthy propeller, which have the effect of reducing the ice forces on the blades. The devices are cutters which initiate cleavage failure in the ice and consequently lower the total force.

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