Ice-breaker with pontoon-shaped front - has cutting edges, each interrupted below water level line, continuing tangentially to disc wheel

摘要

The icebreaker has a pontoon-shaped forebody, and two cutting edges extending from the front top to the rear bottom. Each cutting edge is interupted below the water level line. It extends tangentially to the rear of the circumference of a disc-shaped wheel, which rotates freely about an axis, extending across the ship. Behind the wheel there is pref a ship-mounted cutting edge, extending from the bottom to the seat top. There may be several wheels on either side of the ship. ADVANTAGE - High breaking frictionm concentration.