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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.
Satisfied that the copper had had the desired effect, the Admiralty introduced copper sheathing on a number of frigates. In 1776 Alarm was resurveyed. It was soon discovered that the sheathing had become detached from the hull in many places because the iron nails which had been used to fasten the copper to the timbers had been "much rotted".
The wooden planking of a composite ship allowed the copper sheathing essential for fast ocean crossings under sail while the iron frame made the ship relatively immune from hogging and sagging, and took up less interior space than wooden framing.
Paul Revere's interest in copper rolling began when, after the American Revolution, the American navy wanted to begin using this process of copper sheathing the nation's ships. Benjamin Stoddert , a successful businessman and ardent Federalist , recognized the importance of a powerful Navy in preserving the economic and political independence ...
The copper sheathing had been delivered to the dockyard wrapped in the paper which was not always removed before the sheets were nailed to the hull. The conclusion therefore reported to the Admiralty in 1763 was that iron should not be allowed direct contact with copper in sea water. [10] [11]
An Old Whaler Hove Down For Repairs, Near New Bedford, a wood engraving drawn by F. S. Cozzens and published in Harper's Weekly, December 1882. Careening (also known as "heaving down") is a method of gaining access to the hull of a sailing vessel without the use of a dry dock.
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