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HSwMS Hälsingland (J23)
HSwMS ''Hälsingland'' (J23) was the fourth ship of the . Design Due to time and cost, HSwMS Östergötland (J20), HSwMS ''Östergötland'', like the other ships in the class, was built largely according to the drawings of the Öland-class destroyer, ''Öland''-class destroyer. The length of the ship was 111.8 meters and the Beam (ship), beam was 11.2 meters. Due to different equipment, however, the new vessels became about 200 Ton (unit), tons heavier, which gave a Draft (hull), draft of 3.7 meters, against the ''Öland''-class of 3.4 meters. The machinery consisted of two oil-fired steam boilers of the Babcock & Wilcox brand, which supplied steam with a pressure of 32 bars to two steam turbines of the DeLaval brand, which in turn each operated a propeller. The machinery gave the effect 47,000 horsepower on the axles, which gave a top speed of 35 Knot (unit), knots. The main guns consisted of four 120 mm (4.7 in) guns m/44 placed in two double towers, one on the fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hälsingland
Hälsingland (), sometimes referred to by the Latin name Helsingia, is a historical Provinces of Sweden, province or ''landskap'' in central Sweden. It borders Gästrikland, Dalarna, Härjedalen, Medelpad and the Gulf of Bothnia. It is part of the lands of Sweden, land of Norrland. Princess Madeleine, Duchess of Hälsingland and Gästrikland, Princess Madeleine is currently the duchess of Hälsingland, along with Gästrikland. Administration The traditional provinces of Sweden serve no administrative or political purpose, but are historical and cultural entities. In the case of Hälsingland the province constitutes the northern part of the ''län'' ('administrative Counties of Sweden, county') Gävleborg County. Minor parts of the province are in Jämtland County and in Västernorrland County. The following municipalities have their seats in Hälsingland: * Bollnäs Municipality, Bollnäs * Hudiksvall Municipality, Hudiksvall * Ljusdal Municipality, Ljusdal * Nordanstig Munic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beam (ship)
The beam of a ship is its width at its widest point. The maximum beam (BMAX) is the distance between planes passing through the outer sides of the ship, beam of the hull (BH) only includes permanently fixed parts of the hull, and beam at waterline (BWL) is the maximum width where the hull intersects the surface of the water. Generally speaking, the wider the beam of a ship (or boat), the more initial stability it has, at the expense of secondary stability in the event of a capsize, where more energy is required to right the vessel from its inverted position. A ship that heels on her ''beam ends'' has her deck beams nearly vertical. Typical values Typical length-to-beam ratios (aspect ratios) for small sailboats are from 2:1 (dinghies to trailerable sailboats around ) to 5:1 (racing sailboats over ). Large ships have widely varying beam ratios, some as large as 20:1. Rowing shells designed for flatwater racing may have length to beam ratios as high as 30:1, while a coracle ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commissioned (ship)
Ship commissioning is the act or ceremony of placing a ship in active service and may be regarded as a particular application of the general concepts and practices of project commissioning. The term is most commonly applied to placing a warship in active duty with its country's military forces. The ceremonies involved are often rooted in centuries-old naval tradition. Ship naming and launching endow a ship hull with her identity, but many milestones remain before it is completed and considered ready to be designated a commissioned ship. The engineering plant, weapon and Electronics, electronic systems, Galley (kitchen), galley, and other equipment required to transform the new hull into an operating and habitable warship are installed and tested. The prospective commanding officer, ship's officers, the petty officers, and seamen who will form the crew report for training and familiarization with their new ship. Before commissioning, the new ship undergoes sea trials to identify a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Launched (ship)
Ceremonial ship launching involves the performing of ceremonies associated with the process of transferring a vessel to the water. It is a nautical tradition in many cultures, dating back millennia, to accompany the physical process with ceremonies which have been observed as public celebration and a solemn blessing, usually but not always, in association with the launch itself. Ship launching imposes stresses on the ship not met during normal operation and in addition to the size and weight of the vessel represents a considerable engineering challenge as well as a public spectacle. The process also involves many traditions intended to invite good luck, such as christening by breaking a sacrificial bottle of champagne over the bow as the ship is named aloud and launched. Methods There are three principal methods of conveying a new ship from building site to water, only two of which are called "launching". The oldest, most familiar, and most widely used is the end-on la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gothenburg
Gothenburg ( ; ) is the List of urban areas in Sweden by population, second-largest city in Sweden, after the capital Stockholm, and the fifth-largest in the Nordic countries. Situated by the Kattegat on the west coast of Sweden, it is the gubernatorial seat of Västra Götaland County, with a population of approximately 600,000 in the city proper and about 1.1 million inhabitants in Metropolitan Gothenburg, the metropolitan area. Gustavus Adolphus, King Gustavus Adolphus founded Gothenburg by royal charter in 1621 as a heavily fortified, primarily Dutch, trading colony. In addition to the generous privileges given to his Dutch allies during the ongoing Thirty Years' War, e.g. tax relaxation, he also attracted significant numbers of his German and Scottish allies to populate his only town on the western coast; this trading status was furthered by the founding of the Swedish East India Company. At a key strategic location at the mouth of the , where Scandinavia's largest dr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seacat (missile)
Seacat was a British short-range surface-to-air missile system intended to replace the ubiquitous Bofors 40 mm gun aboard warships of all sizes. It was the world's first operational shipboard point-defence missile system, and was designed so that the Bofors guns could be replaced with minimum modification to the recipient vessel and (originally) using existing fire-control systems. A mobile land-based version of the system was known as Tigercat. The initial GWS.20 version was manually controlled, in keeping with the need for a rapidly developed and deployed system. Several variants followed; GWS.21 added radar-cued manual control for night and bad-weather use, GWS.22 added a SACLOS automatic guidance mode, and the final GWS.24 had fully automatic engagement. Tigercat saw relatively brief service before being replaced in British service by the Rapier, while Seacat saw longer service until being replaced by Sea Wolf and newer technology close-in weapons systems. Seacat and Tiger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-aircraft Missile , a missile designed to be launched from the ground to destroy aircraft or other missiles
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Anti-aircraft missiles are guided missiles designed to destroy or damage aircraft. These include * air-to-air missile, a missile fired from an aircraft for the purpose of destroying another aircraft * subsurface-to-air missile, a missile usually launched from below water * surface-to-air missile A surface-to-air missile (SAM), also known as a ground-to-air missile (GTAM) or surface-to-air guided weapon (SAGW), is a missile designed to be launched from the ground or the sea to destroy aircraft or other missiles. It is one type of anti-ai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knot (unit)
The knot () is a unit of speed equal to one nautical mile per hour, exactly (approximately or ). The ISO standard symbol for the knot is kn. The same symbol is preferred by the Institute of Electrical and Electronics Engineers ( IEEE), while kt is also common, especially in aviation, where it is the form recommended by the International Civil Aviation Organization ( ICAO). The knot is a non- SI unit. The knot is used in meteorology, and in maritime and air navigation. A vessel travelling at 1 knot along a meridian travels approximately one minute of geographic latitude in one hour. Definitions ;1 international knot = :1 nautical mile per hour (by definition), : (exactly), : (approximately), : (approximately), : (approximately) : (approximately). The length of the internationally agreed nautical mile is . The US adopted the international definition in 1954, having previously used the US nautical mile (). The UK adopted the international nautical mile defi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horsepower
Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the imperial horsepower as in "hp" or "bhp" which is about , and the metric horsepower as in "cv" or "PS" which is approximately . The electric horsepower "hpE" is exactly , while the boiler horsepower is 9809.5 or 9811 watts, depending on the exact year. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses. It was later expanded to include the output power of other power-generating machinery such as piston engines, turbines, and electric motors. The definition of the unit varied among geographical regions. Most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on 1 January 201 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller
A propeller (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 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 stern sculling. In sculling, a single blade is moved through an arc, from side to side taking care to keep presenting the blade to the wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DeLaval
DeLaval is a producer of dairy and farming machinery, with a head office in Tumba, Sweden, and is part of the Tetra Laval group. The company has 18 factories worldwide, employs over 4,500 people. History From the 1870s Gustaf de Laval (1845–1913) developed machines for the dairy industry, including the first centrifugal milk-cream separator and early milking machines. His first separator was patented in 1887, and his first milking machine in 1894. From the early 1880s, De Laval's cream separator, was promoted internationally. For example, the London-based Dairy Supply Co presented the cream separator at the 1891 Dairy Show in London. In 1883, DeLaval and Oscar Lamm founded Aktiebolaget Separator (abbreviated to AB Separator) in Stockholm, Sweden. In the first year the company built 53 milk separators, of which 37 were exported. In 1888 in the US the company founded the De Laval Cream Separator Co. as a subsidiary, with a sales office in New York and production facility in P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Babcock & Wilcox
Babcock & Wilcox Enterprises, Inc. is an American energy technology and service provider that is active and has operations in many international markets with its headquarters in Akron, Ohio. Historically, the company is best known for their steam boilers. Background The company was founded in 1867 in Providence, Rhode Island, by partners Stephen Wilcox and George Herman Babcock, George Babcock to manufacture and market Wilcox's patented water-tube boiler. B&W's list of innovations and firsts include the world's first installed utility boiler (1881); manufacture of boilers to power New York City's first subway (1902); first pulverized coal power plant (1918); design and manufacture of components for , the world's first nuclear-powered submarine (1953–55); the first supercritical boiler, supercritical pressure coal-fired boiler (1957); design and supply of reactors for the first U.S. built nuclear-powered surface ship, (1961).''Steam/its generation and use'', 41st Edition Histo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
