Ships – Ice breakers – Rams
Patent
1978-12-27
1982-09-28
Blix, Trygve M.
Ships
Ice breakers
Rams
114 56, 114356, B63B 3508
Patent
active
043512550
ABSTRACT:
In an ice-breaking ship, having sufficient power and being generally designed for efficient ice-breaking, the breaking of the ice is made more effective by changing the zone of ice crushing and shearing which occurs at the stem during normal ice-breaking of level ice, to a zone where the breaking occurs due to bending. This is obtained by forming the front portion of the ship so that at least within the area where the stem contacts and breaks level ice, the basically wedge-formed stem is truncated to form a relatively broad runner-like portion being inclined forwards in a relatively small angle to the water line plane of the ship. The width of the runner-like portion is determined in conformity with the general ice-breaking ability of the ship, whereby the driving power (P) of the ship, in kW, and the maximum beam (B) of the ship at its design water line, in meters, forms the basis for calculating, in meters, the width (W) of the runner-like portion by means of the formula:
REFERENCES:
patent: 3438350 (1969-04-01), Gallin
patent: 3636904 (1972-01-01), Blanchet
patent: 3762354 (1973-10-01), Waas
patent: 3888200 (1975-06-01), Wendorf
Johansson Bengt
Keinonen Arno
Makinen Eero
Blix Trygve M.
Oy Wartsila Ab
Smolowitz Martin
Sotelo Jesus D.
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