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S-class Destroyer (1917)
The S class (initially known as the Modified ''Trenchant'' classMarch, ''op. cit.'' p.215.) was a class of 67 destroyers ordered for the Royal Navy in 1917 under the 11th and 12th Emergency War Programmes. They saw active service in the last months of the First World War and in the Russian and Irish Civil Wars during the early 1920s. Most were relegated to the reserve by the mid-1920s and subsequently scrapped under the terms of the London Naval Treaty. Eleven survivors saw much action during the Second World War. Background In early 1917, the First World War had been going on for two and a half years. Despite the disappointing outcome of the Battle of Jutland the previous year, the British Grand Fleet, consisting of battleships, cruisers, and destroyers and based in northern Scotland, was successfully confining the German surface navy to the German Bight, while enforcing a blockade of German maritime trade with the wider world. In southern North Sea, the Harwich F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Stephen And Sons
Alexander Stephen and Sons Limited, often referred to simply as Alex Stephens or just Stephens, was a Scottish shipbuilding company based in Linthouse, Glasgow, on the River Clyde and, initially, on the east coast of Scotland. History The company's roots can be found in Alexander Stephen (1722–1793) who began shipbuilding at Burghead on the Moray Firth in 1750.Records of Alexander Stephen & Sons Ltd, shipbuilders and engineers, Linthouse, Govan, Glasgow, Scotland University of Glasgow Archives In 1793 William Stephen (1759–1838), a descendant of his, established a firm of shipbuilders at |
William Beardmore & Company
William Beardmore and Company was a British engineering and shipbuilding conglomerate based in Glasgow and the surrounding Clydeside area. It was active from 1886 to the mid-1930s and at its peak employed about 40,000 people. It was founded and owned by William Beardmore, later Lord Invernairn, after whom the Beardmore Glacier was named. History Forged steel castings, armour plate and naval guns The Parkhead Forge, in the east end of Glasgow, became the core of the company. It was established by Reoch Brothers & Co in 1837 and was later acquired by Robert Napier in 1841 to make forgings and iron plates for his new shipyard in Govan. Napier was given the contract to build , sister ship to the Royal Navy's first true ironclad warship, . Parkead was contracted to make the armour for her, but failed, so the manager, William Rigby called in William Beardmore Snr, who at the time was superintendent of the General Steam Navigation Company in Deptford, to help. Beardmore became a pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yarrow Boiler
Yarrow boilers are an important class of high-pressure water-tube boilers. They were developed by Yarrow & Co. (London), Shipbuilders and Engineers and were widely used on ships, particularly warships. The Yarrow boiler design is characteristic of the three-drum boiler: two banks of straight water-tubes are arranged in a triangular row with a single furnace between them. A single steam drum is mounted at the top between them, with smaller water drums at the base of each bank. Circulation, both upwards and downwards, occurs within this same tube bank. The Yarrow's distinctive features were the use of straight tubes and also circulation in both directions taking place within the tube bank, rather than using external downcomers. Early watertube boilers Early use of the water-tube boiler within the Royal Navy was controversial at times, giving rise to the '' ' Battle of the Boilers' '' around 1900. These first boilers, such as the Belleville and Niclausse, were large-tube desig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam Turbines
A steam turbine is a machine that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Charles Parsons in 1884. Fabrication of a modern steam turbine involves advanced metalwork to form high-grade steel alloys into precision parts using technologies that first became available in the 20th century; continued advances in durability and efficiency of steam turbines remains central to the energy economics of the 21st century. The steam turbine is a form of heat engine that derives much of its improvement in thermodynamic efficiency from the use of multiple stages in the expansion of the steam, which results in a closer approach to the ideal reversible expansion process. Because the turbine generates rotary motion, it can be coupled to a generator to harness its motion into electricity. Such turbogenerators are the core of thermal power stations which can be fueled by fossil-fuels, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller
A propeller (colloquially often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon a working fluid such as water or air. Propellers are used to pump fluid through a pipe or duct, or to create thrust to propel a boat through water or an aircraft through air. The blades are specially shaped so that their rotational motion through the fluid causes a pressure difference between the two surfaces of the blade by Bernoulli's principle which exerts force on the fluid. Most marine propellers are screw propellers with helical blades rotating on a propeller shaft (ship), propeller shaft with an approximately horizontal axis. History Early developments The principle employed in using a screw propeller is derived from sculling. In sculling, a single blade is moved through an arc, from side to side taking care to keep presenting the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Length Overall
__NOTOC__ Length overall (LOA, o/a, o.a. or oa) is the maximum length of a vessel's hull measured parallel to the waterline. This length is important while docking the ship. It is the most commonly used way of expressing the size of a ship, and is also used for calculating the cost of a marina berth (for example, £2.50 per metre LOA). LOA is usually measured on the hull alone. For sailing ships, this may ''exclude'' the bowsprit and other fittings added to the hull. This is how some racing boats and tall ships use the term LOA. However, other sources may include bowsprits in LOA. Confusingly, LOA has different meanings. "Sparred length", "Total length including bowsprit", "Mooring length" and "LOA including bowsprit" are other expressions that might indicate the full length of a sailing ship. LOD Often used to distinguish between the length of a vessel including projections (e.g. bow sprits, etc.) from the length of the hull itself, the Length on Deck or LOD is often repor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Length Between Perpendiculars
Length between perpendiculars (often abbreviated as p/p, p.p., pp, LPP, LBP or Length BPP) is the length of a ship along the summer load line from the forward surface of the stem, or main bow perpendicular member, to the after surface of the sternpost, or main stern perpendicular member. When there is no sternpost, the centerline axis of the rudder stock is used as the aft end of the length between perpendiculars. Measuring to the stern post or rudder stock was believed to give a reasonable idea of the ship's carrying capacity, as it excluded the small, often unusable volume contained in her overhanging ends. On some types of vessels this is, for all practical purposes, a waterline measurement. In a ship with raked stems, naturally that length changes as the draught of the ship changes, therefore it is measured from a defined loaded condition. See also * Length overall __NOTOC__ Length overall (LOA, o/a, o.a. or oa) is the maximum length of a vessel's hull measured para ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Displacement (ship)
The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weight. Traditionally, various measurement rules have been in use, giving various measures in long tons. Today, tonnes are more commonly used. Ship displacement varies by a vessel's degree of load, from its empty weight as designed (known as "lightweight tonnage") to its maximum load. Numerous specific terms are used to describe varying levels of load and trim, detailed below. Ship displacement should not be confused with measurements of volume or capacity typically used for commercial vessels and measured by tonnage: net tonnage and gross tonnage. Calculation The process of determining a vessel's displacement begins with measuring its draft.George, 2005. p.5. This is accomplished by means of its "draft marks" (or "load lines"). A mer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
V And W-class Destroyer
The V and W class was an amalgam of six similar classes of destroyer built for the Royal Navy under the 9th, 10th, 13th and 14th of fourteen War Emergency Programmes during the First World War and generally treated as one class. For their time they were among the most powerful and advanced ships of their type in the world, and set the trend for future British designs. They arrived in time to see service in the First World War. During the interwar period these ships formed the backbone of the Royal Navy's destroyer flotillas until gradually replaced by new construction; by the mid-1930s most had been displaced to the reserve fleet. Most ships survived to make an extensive contribution to the Second World War effort, in the vital role of convoy escort, freeing up more modern ships for fleet action. History The V and W class were the ultimate evolution of British destroyer design in the First World War, embodying the improvements of their predecessors as well as new technol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scotstoun
Scotstoun ( gd, Baile an Sgotaich) is an area of Glasgow, Scotland, west of Glasgow City Centre. It is bounded by Garscadden and Yoker to the west, Victoria Park, Jordanhill and Whiteinch to the east, Jordanhill to the north and the River Clyde (and Braehead beyond) to the south. At the heart of Scotstoun lies Scotstounhill, an enclave of late Victorian and post-war housing centred on Scotstounhill railway station. Scotstoun (along with the Govan shipyard) is home to BAE Systems Surface Ships (formerly Yarrow Shipbuilders), and to the Glasgow Warriors rugby team. History Scotstoun was until the early 1860s the site of the Oswald family estate, which was centred on Scotstoun House. By 1861 the westward expansion of the Clyde shipbuilding yards had reached Scotstoun with the opening of the Charles Connell and Company shipyard in 1861 and the new Yarrow Shipbuilders yard in 1906. This led to the break-up of the estate, as portions were sold off for housing, to create Victoria Park a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yarrow And Company
Yarrow Shipbuilders Limited (YSL), often styled as simply Yarrows, was a major shipbuilding firm based in the Scotstoun district of Glasgow on the River Clyde. It is now part of BAE Systems Surface Ships, owned by BAE Systems, which has also operated the nearby Govan shipyard (formerly Fairfields) since 1999. History Origins in London The company was founded by Alfred Yarrow, later Sir Alfred Yarrow, 1st Baronet, in the year 1865 as Yarrow & Company, Limited. Originally it was based at Folly Wall, Poplar, then in 1898 as the company grew, Yarrow moved his shipyard to London Yard, Cubitt Town.History of London Yard by Angela Brown and Ron Coverson, 2001 Hundreds of steam launches, lake and river vessels, and eventually the Royal Navy's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Woolston, Southampton
Woolston is a suburb of Southampton, Hampshire, located on the eastern bank of the River Itchen. It is bounded by the River Itchen, Sholing, Peartree Green, Itchen and Weston. The area has a strong maritime and aviation history. The former hamlet grew as new industries, roads and railways came to the area in the Victorian era with Woolston formally incorporated into the borough of Southampton in 1920. History Woolston is believed to originate from ''Olafs tun'', a fortified tun on the East bank of the River Itchen established by the Viking leader Olaf I of Norway in the 10th Century. In the Domesday Book of 1086, the area is recorded as ''Olvestune''. The area now known as Woolston is certain to have received consignments of wool to be ferried across the River Itchen, Hampshire by the inhabitants of Itchen Ferry village. The evolution of ''Olvestune'' into "Woolston" is a result of that trade. The former hamlet grew as new industries, roads and railways came to the area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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