|
Halcyon-class Minesweeper
The ''Halcyon'' class was a class of 21 oil-fuelled minesweepers (officially, "fleet minesweeping sloops") built for the British Royal Navy between 1933 and 1939. They were given traditional small ship names used historically by the Royal Navy and served during the Second World War. Design There were 21 ships in the ''Halcyon'' class, built in two groups; the first using reciprocating steam engines, with steam turbines in the latter. They were generally smaller versions of the escort sloops. ''Niger'' and Salamander' of the reciprocating group used vertical triple expansion engines, instead of the vertical compound engines of their sisters. As a result of the increased power they had a half knot speed advantage, even though they used slightly shorter hulls. The turbine ships used the same shorter hulls as ''Niger'' and ''Salamander'', but with lower power, speed dropped back to . ''Gleaner'', ''Franklin'', ''Jason'' and ''Scott'' were completed as unarmed survey vessels, '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Britomart
Seven ships of the Royal Navy have borne the name HMS ''Britomart'', after the Britomartis of Greek mythology: * HMS ''Britomart'' was a 16-gun brig-sloop captured from the Danes in 1807 and commissioned as . She was renamed HMS ''Britomart'' in 1808, but the name change was rescinded before she wrecked in 1809. * was a 10-gun launched in 1808. She participated in the capture of several small privateers and merchant vessels. She was also at the bombardment of Algiers (1816). The Navy sold ''Britomart'' in 1819. She then entered mercantile service. She sailed to South America, Van Diemen's Land (now Tasmania), and the Indian Ocean. She spent much of her time sailing between England, Van Diemen's Land and the Australian mainland. She foundered in 1839 on her way between Port Phillip and Hobart. * was another 10-gun ''Cherokee''-class brig-sloop, launched in 1820 and sold in 1843. Captain William Hobson, of ''Britomart'', asserted British sovereignty over New Zealand in 1840 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reciprocating Engines
A reciprocating engine, more often known as a piston engine, is a heat engine that uses one or more reciprocating pistons to convert high temperature and high pressure into a rotating motion. This article describes the common features of all types. The main types are: the internal combustion engine, used extensively in motor vehicles; the steam engine, the mainstay of the Industrial Revolution; and the Stirling engine for niche applications. Internal combustion engines are further classified in two ways: either a spark-ignition (SI) engine, where the spark plug initiates the combustion; or a compression-ignition (CI) engine, where the air within the cylinder is compressed, thus heating it, so that the heated air ignites fuel that is injected then or earlier.''Thermodynamics: An Engineering Approach'' by Yunus A. Cengal and Michael A. Boles Common features in all types There may be one or more pistons. Each piston is inside a cylinder, into which a gas is introduced, eith ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soviet
The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet Union, it dissolved in 1991. During its existence, it was the list of countries and dependencies by area, largest country by area, extending across Time in Russia, eleven time zones and sharing Geography of the Soviet Union#Borders and neighbors, borders with twelve countries, and the List of countries and dependencies by population, third-most populous country. An overall successor to the Russian Empire, it was nominally organized as a federal union of Republics of the Soviet Union, national republics, the largest and most populous of which was the Russian SFSR. In practice, Government of the Soviet Union, its government and Economy of the Soviet Union, economy were Soviet-type economic planning, highly centralized. As a one-party state go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arctic Convoys
The Arctic convoys of World War II were oceangoing convoys which sailed from the United Kingdom, Iceland, and North America to northern ports in the Soviet Union – primarily Arkhangelsk (Archangel) and Murmansk in Russia. There were 78 convoys between August 1941 and May 1945, sailing via several seas of the Atlantic and Arctic oceans, with periods with no sailings during several months in 1942, and in the summers of 1943 and 1944. About 1,400 merchant ships delivered essential supplies to the Soviet Union under the Anglo-Soviet Agreement and US Lend-Lease program, escorted by ships of the Royal Navy, Royal Canadian Navy, and the U.S. Navy. Eighty-five merchant vessels and 16 Royal Navy warships (two cruisers, six destroyers, eight other escort ships) were lost. Nazi Germany's ''Kriegsmarine'' lost a number of vessels including one battleship, three destroyers, 30 U-boats, and many aircraft. The convoys demonstrated the Allies' commitment to helping the Soviet Union, prior to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operation Dynamo
Operation or Operations may refer to: Arts, entertainment and media * ''Operation'' (game), a battery-operated board game that challenges dexterity * Operation (music), a term used in musical set theory * ''Operations'' (magazine), Multi-Man Publishing's house organ for articles and discussion about its wargaming products * ''The Operation'' (film), a 1973 British television film * ''The Operation'' (1990), a crime, drama, TV movie starring Joe Penny, Lisa Hartman, and Jason Beghe * The Operation M.D., formerly The Operation, a Canadian garage rock band * "Operation", a song by Relient K from '' The Creepy EP'', 2001 Television Episodes * "The Operation", ''Sky Dancers'' episode 27 (1996) * "The Operation", ''The Golden Girls'' season 1, episode 18 (1986) * "The Operation", ''You're Only Young Twice'' (1997) series 2, episode 8 (1978) Shows * ''The Operation'' (1992–1998), a reality television series from TLC Business * Manufacturing operations, operation of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dunkirk
Dunkirk ( ; ; ; Picard language, Picard: ''Dunkèke''; ; or ) is a major port city in the Departments of France, department of Nord (French department), Nord in northern France. It lies from the Belgium, Belgian border. It has the third-largest French harbour. The population of the commune in 2019 was 86,279. Etymology and language use The name of Dunkirk derives from West Flemish 'dune' or 'dun (fortification), dun' and 'church', thus 'church in the dunes'. A smaller town 25 km (15 miles) farther up the Flemish coast originally shared the same name, but was later renamed Oostduinkerke(n) in order to avoid confusion. Until the middle of the 20th century, French Flemish (the local variety of Dutch language, Dutch) was commonly spoken. History Middle Ages A fishing village arose late in the tenth century, in the originally flooded coastal area of the English Channel south of the Western Scheldt, when the area was held by the County of Flanders, Counts of Flanders, va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Panne
De Panne (; ) is a town and a municipality located on the North Sea coast of the Belgian province of West Flanders. There it borders France, making it the westernmost town in Belgium. It is one of the most popular resort town destinations within Belgium. The municipality includes the village of Adinkerke. On 1 January 2011, De Panne had a total population of 10,748 on a total area of 23.90 km2, which gives a population density of 449.7 inhabitants per km2. Miscellaneous Famous people who have lived or died in De Panne include King Albert I and Queen Elisabeth, and John Aidan Liddell, VC, who died in De Panne in August 1915. The Belgian royal family lived in De Panne during the First World War because it was located in the tiny fraction of their country that was not conquered by the Germans. De Panne is home to Plopsaland, a theme park aimed at young children and located on the former grounds of Meli Park. De Panne was also the place where the first land yachts inten ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dive Bomber
A dive bomber is a bomber aircraft that dives directly at its targets in order to provide greater accuracy for the bomb it drops. Diving towards the target simplifies the bomb's trajectory and allows the pilot to keep visual contact throughout the bomb run. This allows attacks on point targets and ships, which were difficult to attack with conventional level bombers, even ''en masse''. Dive bombing was especially effective against vehicles when integrated into early instances of Blitzkrieg. After World War II, the rise of precision-guided munitions and improved anti-aircraft defences—both fixed gunnery positions and fighter interception—led to a fundamental change in dive bombing. New weapons, such as rockets, allowed for better accuracy from smaller dive angles and from greater distances. They could be fitted to almost any aircraft, including fighters, improving their effectiveness without the inherent vulnerabilities of dive bombers, which needed air superiority to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lybster
Lybster (, ) is a village on the east coast of Caithness in northern Scotland. It was once a big herring fishing port. The Waterlines heritage museum is located in Lybster Harbour and provides information on the history and geology of Lybster. A small number of crab fishing boats also operate from Lybster Harbour. Lybster lies at the end of the tenth stage of the John o' Groats Trail, a long-distance walking trail from Inverness to John o' Groats. History Lybster owes its origin to the fishing industry. A wooden pier was built in 1790 for use by the fishing boats. The village was founded in 1802 as a planned village by the local landowner, General Patrick Sinclair and his sons continued with its development. By 1859 some 357 boats operated from the harbour, making it the third busiest fishing port in Scotland, only exceeded by Wick and Fraserburgh. By this time there were some 1500 fishermen at sea, and other servicing the industry on land. Lybster railway station was part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forecastle
The forecastle ( ; contracted as fo'c'sle or fo'c's'le) is the upper deck (ship), deck of a sailing ship forward of the foremast, or, historically, the forward part of a ship with the sailors' living quarters. Related to the latter meaning is the phrase "Wiktionary:before the mast, before the mast" which denotes anything related to ordinary sailors, as opposed to a ship's officers. History and design In medieval shipbuilding, a ship of war was usually equipped with a tall, multi-deck castle-like structure in the bow (ship), bow of the ship. It served as a platform for archers to shoot down on enemy ships, or as a defensive stronghold if the ship were boarded. A similar but usually much larger structure, called the aftcastle, was at the aft end of the ship, often stretching all the way from the main Mast (sailing), mast to the stern. Having such tall upper works on the ship was detrimental to sailing performance. As cannons were introduced and gunfire replaced boarding as th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinnaird Head
Kinnaird Head (, "high headland") is a headland projecting into the North Sea, within the town of Fraserburgh, Aberdeenshire, on the east coast of Scotland. The 16th-century Kinnaird Castle was converted in 1787 for use as the Kinnaird Head Lighthouse, the first lighthouse in Scotland to be lit by the Commissioners of Northern Lights. Kinnaird Castle and the nearby Wine Tower were described by W. Douglas Simpson as two of the nine castles of the Knuckle, referring to the rocky headland of north-east Aberdeenshire. The lighthouse is a category A listed building. and the Wine Tower (perhaps from ''Wynd Tower''). is a scheduled monument. The buildings around the base of the lighthouse are the work of Robert Stevenson. Kinnaird Castle , also known as Fraserburgh Castle and Kinnairdshead Castle, was begun in March 1570. The builder was Sir Alexander Fraser, 8th laird of Philorth (c.1536–1623), who also transformed the fishing village of Faithlie into the burgh of Fraserburgh in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mediterranean Sea
The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Europe, on the south by North Africa, and on the west almost by the Morocco–Spain border. The Mediterranean Sea covers an area of about , representing 0.7% of the global ocean surface, but its connection to the Atlantic via the Strait of Gibraltar—the narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa—is only wide. Geological evidence indicates that around 5.9 million years ago, the Mediterranean was cut off from the Atlantic and was partly or completely desiccation, desiccated over a period of some 600,000 years during the Messinian salinity crisis before being refilled by the Zanclean flood about 5.3 million years ago. The sea was an important ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
