12:50 Jul 3, 2008 |
Romanian to English translations [PRO] Tech/Engineering - Ships, Sailing, Maritime | |||||||
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| Selected response from: Anca Nitu Local time: 18:24 | ||||||
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Summary of answers provided | ||||
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3 | spur/ prop |
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1 -1 | bulbous bow |
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Discussion entries: 3 | |
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spur/ prop Explanation: Domaine(s) : - marine construction navale anglais français shore accore n. f. Définition : Strong prop that supports a vessel's hull while building or in dock. Sous-entrée(s) : synonyme(s) prop quasi-synonyme(s) spur For a ship to be considered an icebreaker it requires three components: a strengthened hull, an ice-clearing shape, and the power to push through, none of which are possessed by most normal ships. ------------- Design and construction Icebreakers are constructed with a double hull and watertight compartments in case of a breach. The ship's hull is thicker than normal, especially at the bow, stern, and waterline, using special steel that has optimum performance at low temperatures. The thicker steel at the waterline typically extends about 1 m above and below the waterline, and is reinforced with extra internal ribbing, sometimes twice the ribbing of a normal ship. The bow is rounded rather than pointed, allowing the vessel to ride up over the ice, breaking it with the weight of the vessel. The hull has no appendages likely to be damaged by the ice, and the rudder and propeller are protected by the shape of the hull. The propeller blades are strengthened, and the vessel has the ability to inspect and replace blades while at sea.[3] http://en.wikipedia.org/wiki/Icebreaker formele rotunde fiind "the bulbous bow" sau "reinforced hull" nu sunt foarte sigura |
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bulbous bow Explanation: http://www.answers.com/topic/bulbous-bow?cat=technology -------------------------------------------------- Note added at 1 hr (2008-07-03 13:54:13 GMT) -------------------------------------------------- naval architecture) A large, elliptical or cylindrical swelling of the lower underwater hull form protruding forward of the bow designed to cancel wave-making at high speeds. -------------------------------------------------- Note added at 6 hrs (2008-07-03 18:57:57 GMT) -------------------------------------------------- A bulbous bow, a feature of many modern ship hulls, is a protruding bulb at the bow (or front) below the waterline. Usually visible only when a ship is in drydock, the bulb modifies how water flows around the hull, reducing drag and increasing in speed, range, and fuel efficiency. Ships with bulbous bows generally have 12 to 15 percent better fuel efficiency than similar vessels without them. Bulbous bows achieve maximum effect at a narrow range of speeds over 6 knots (Bray, website). At other speeds, they can increase drag. They have the greatest effect on large ships such as freighters, navy vessels and various passenger ships. They are rarer on recreational boats designed for wide speed ranges and planing over the water. |
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