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The metal sheathing of Cutty Sark, made from the copper alloy Muntz metal. Copper sheathing is a method for protecting the hull of a wooden vessel from attack by shipworm, barnacles and other marine growth through the use of copper plates affixed to the surface of the hull, below the waterline.
In the meantime the copper sheathing was removed from Alarm, and several other test vessels until an effective solution to the corrosion problem could be developed. Later in her career she was commanded by a young John Jervis, from 1769 onwards. He sailed for the Mediterranean in May and arrived in Genoa on 7 September.
Its hull had copper sheathing over timber beneath the waterline, but that timber simply served to separate the iron hull from the copper sheathing so as to prevent electrolytic corrosion. [7] The timber extended to the upper deck; it was in two layers from the keel to 3 ft (.9 m) above the water line, and one layer above. [8]
The hull was sheathed in copper to protect it from parasites and biofouling and it featured a pronounced tumblehome. The Prussians regarded the ship as a poor seaboat. The ram bow caused the vessel to ship a great deal of water. It was, however, responsive to commands from the helm and had a very tight turning radius.
Boat – Vessel for transport by water; Cathedral hull; Chainplate – Fittings on sailing ships; Copper sheathing – Ship hull covering; Displacement–length ratio – Ship measurement; Double hull – Ship hull design and construction method; Draft – Depth of a vessel below its waterline
The ship was designed with four gun decks mounting a total of 170 guns and would have measured 3,700 tons burden. [1] [2] She would have had a three tier stern gallery and would have featured full copper sheathing and a double ship's wheel. [3]
The hulls of these vessels were of course adapted for the screw driven by their reciprocating steam engines. In common with older vessels, they were coppered to reduce fouling from marine growth, and the copper sheathing was affixed to timber as in wooden ships, but that timber was not structural, but simply encased the metal hull beneath. [7]
The copper sheathing on her hull needed to be replaced and Paul Revere supplied the copper sheets necessary for the job that took 14 days, ending on 25 June. [67] [68] [69] The ship departed Boston on 14 August, and it encountered an unknown ship in the darkness on 6 September, near the Rock of Gibraltar.