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Ferrofluid on glass, with a rare-earth magnet underneath. A rare-earth magnet is a strong permanent magnet made from alloys of rare-earth elements.Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets.
Magnetic sweeping, with a towed device producing a magnetic field to trigger magnetic mines. To protect the minesweeper itself against magnetic mines, the hull and superstructure of the ship are made of wood. Other components are made of non-magnetic materials, and any magnetic materials are strictly controlled.
Mine warfare consists of: minelaying, the deployment of explosive naval mines at sea to sink enemy ships or to prevent their access to particular areas; minesweeping, the removal or detonation of naval mines; and degaussing, the process of decreasing or eliminating a remnant magnetic field in a ship's hull to prevent its detection by magnetic mines.
MMS-class minesweeper (403 ships, launched 1940—1945) inshore acoustic / magnetic motor minesweepers; Algerine-class minesweeper (98 ships, launched 1941—1945) twin-screw multi-role minesweeping sloops; Catherine-class minesweeper (22 ships, transferred from the US Navy in 1941 under the Lend-Lease program) twin-screw multi-role ...
In the early months of the Second World War, Germany made extensive use of magnetic mines, which led to a requirement for a wooden minesweeper, less vulnerable than steel trawlers. [1] The resultant design, the 105 ft-class [ 2 ] (also known as the MMS 1 series [ 3 ] and later the Type 1501 series [ 4 ] ) was built between 1940 and 1944.
Alnico alloys can be magnetised to produce strong magnetic fields and have a high coercivity (resistance to demagnetization), thus making strong permanent magnets. Of the more commonly available magnets, only rare-earth magnets such as neodymium and samarium-cobalt are stronger.
This lawn sweeper picks up leaves, pine needles, and twigs in the yard with a simple push. It's much easier to use than a rake and you can get it on Amazon. ... As if all that wasn’t enough, it ...
The distance sweep mimics the sound and magnetism of a ship and is pulled behind the sweeper. It has floating coils and large underwater drums. It is the only sweep effective against bottom mines. During the Second World War, RAF Coastal Command used Vickers Wellington bombers Wellington DW.Mk I fitted with degaussing coils to trigger magnetic ...
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