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Parachute Mine
A parachute mine is a naval mine dropped from an aircraft by parachute. They were mostly used in the Second World War by the Luftwaffe and initially by the Royal Air Force (RAF) Bomber Command. Frequently, they were dropped on land targets. History Luftwaffe During the Second World War, the Luftwaffe used a number of different kinds of parachute mines. The ''Luftmine'' A (LMA) and ''Luftmine'' B (LMB) weighed and respectively. The LMA was in length and the LMB . After the parachute opened, the mine would descend at around . If it came down on land, a clockwork mechanism would detonate the mine 25 seconds after impact. If the mine landed in water it would sink to the bottom. If the depth was greater than , water pressure and the dissolving of a water–soluble plug would deactivate the clockwork time-detonator, and activate an anti-shipping detonator. These were initially magnetic detonators but later, acoustic or magnetic/acoustic detonators could be fitted. The Luftwaffe beg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Parachute Mine
German(s) may refer to: * Germany (of or related to) **Germania (historical use) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizens of Germany, see also German nationality law **Germanic peoples (Roman times) * German language **any of the Germanic languages * German cuisine, traditional foods of Germany People * German (given name) * German (surname) * Germán, a Spanish name Places * German (parish), Isle of Man * German, Albania, or Gërmej * German, Bulgaria * German, Iran * German, North Macedonia * German, New York, U.S. * Agios Germanos, Greece Other uses * German (mythology), a South Slavic mythological being * Germans (band), a Canadian rock band * "German" (song), a 2019 song by No Money Enterprise * ''The German'', a 2008 short film * "The Germans", an episode of ''Fawlty Towers'' * ''The German'', a nickname for Congolese rebel André Kisase Ngandu See also * Germanic (other) * Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Degaussing
Degaussing is the process of decreasing or eliminating a remnant magnetic field. It is named after the gauss, a unit of magnetism, which in turn was named after Carl Friedrich Gauss. Due to magnetic hysteresis, it is generally not possible to reduce a magnetic field completely to zero, so degaussing typically induces a very small "known" field referred to as bias. Degaussing was originally applied to reduce ships' magnetic signatures during World War II. Degaussing is also used to reduce magnetic fields in cathode ray tube monitors and to destroy data held on magnetic storage. Ships' hulls The term was first used by then-Commander Charles F. Goodeve, Royal Canadian Naval Volunteer Reserve, during World War II while trying to counter the German magnetic naval mines that were wreaking havoc on the British fleet. The mines detected the increase in the magnetic field when the steel in a ship concentrated the Earth's magnetic field over it. Admiralty scientists, including Goodev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mine Warfare
Mine warfare refers to the use of different types of explosive devices: *Land mine, a weight-triggered explosive device intended to maim or kill people or to disable or destroy vehicles *Minelaying, deployment of explosive mines at sea **Naval mine, a self-contained explosive device placed in water to destroy ships or submarines *Mining (military), the use of tunnels and sometimes large amounts of explosives to bring down fortifications See also * Minesweeper (other) * Minehunter * Minelayer A minelayer is any warship, submarine or military aircraft deploying explosive mines. Since World War I the term "minelayer" refers specifically to a naval ship used for deploying naval mines. "Mine planting" was the term for installing cont ... {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerial Bombs
An aerial bomb is a type of explosive or incendiary weapon intended to travel through the air on a predictable trajectory. Engineers usually develop such bombs to be dropped from an aircraft. The use of aerial bombs is termed aerial bombing. Bomb types Aerial bombs include a vast range and complexity of designs. These include unguided gravity bombs, guided bombs, bombs hand-tossed from a vehicle, bombs needing a large specially-built delivery-vehicle, bombs integrated with the vehicle itself (such as a glide bomb), instant-detonation bombs, or delay-action bombs. As with other types of explosive weapons, aerial bombs aim to kill and injure people or to destroy materiel through the projection of one or more of blast, fragmentation, radiation or fire outwards from the point of detonation. Early bombs The first bombs delivered to their targets by air were single bombs carried on unmanned hot air balloons, launched by the Austrians against Venice in 1849 during the First Ital ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blockbuster Bomb
A blockbuster bomb or cookie was one of several of the largest conventional bombs used in World War II by the Royal Air Force (RAF). The term ''blockbuster'' was originally a name coined by the press and referred to a bomb which had enough explosive power to destroy an entire street or large building through the effects of blast in conjunction with incendiary bombs. Design The bombs then called ''Blockbusters'' were the RAF's HC (high capacity) bombs. These bombs had especially thin casings that allowed them to contain approximately three-quarters of their weight in explosive, with a 4000 lb bomb (nominal weight) containing about of explosive (Amatol, RDX or Torpex). Most general-purpose bombs, termed "medium capacity'" (MC) by the RAF, contained 50% explosive by weight, the rest being made up of the fragmentation casing. Larger Blockbusters were made later in the war, from the original version, up to . The 4000 lb High Capacity Mark I bomb – actual weight around – wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photoelectric Cell
A solar cell, or photovoltaic cell, is an electronic device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon.Solar Cells chemistryexplained.com It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as , , or resistance, vary when exposed to light. Individual solar cell devices are often the electrica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bakelite
Polyoxybenzylmethylenglycolanhydride, better known as Bakelite ( ), is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde. The first plastic made from synthetic components, it was developed by Leo Baekeland in Yonkers, New York in 1907, and patented on December 7, 1909 (). Because of its electrical nonconductivity and heat-resistant properties, it became a great commercial success. It was used in electrical insulators, radio and telephone casings, and such diverse products as kitchenware, jewelry, pipe stems, children's toys, and firearms. The "retro" appeal of old Bakelite products has made them collectible. The creation of a synthetic plastic was revolutionary for the chemical industry, which at the time made most of its income from cloth dyes and explosives. Bakelite's commercial success inspired the industry to develop other synthetic plastics. In recognition of its significance as the world's first commercial syntheti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Victoria Hall Disaster
The Victoria Hall disaster occurred on 16 June 1883 at the Victoria Hall in Sunderland, England, when a stampede for free toys caused 183 children (aged between 3 and 14 years old) to be crushed to death due to compressive asphyxia. Events On 16 June 1883, a children's variety show was presented by travelling entertainers Mr. and Mrs. Fay. The travelling magic show, consisting of a variety of conjuring tricks and illusions, passed without incident, except when a puff of smoke from one of the tricks "disagreed" with some of those in the front row, and caused a few children to be sick. At the end of the show, an announcement was made that children with certain numbered tickets would be presented with a prize upon exit. At the same time, entertainers began distributing gifts from the stage to the children in the stalls. Worried about missing out on the treats, many of the estimated 1,100 children in the gallery surged toward the staircase leading downstairs. At the bottom of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Al Bowlly
Albert Allick Bowlly (7 January 1898 – 17 April 1941) was a Mozambican-born South African– British vocalist and jazz guitarist, who was popular during the 1930s in Britain. He recorded more than 1,000 songs. His most popular songs include "Midnight, the Stars and You", " Goodnight, Sweetheart", " Close Your Eyes", " The Very Thought of You", "Guilty", " Heartaches" and "Love Is the Sweetest Thing". He also recorded the only English version of "Dark Eyes" by Adalgiso Ferraris, as "Black Eyes", with the words of Albert Mellor. Early life Al Bowlly was a Mozambican-born South African–British vocalist and jazz guitarist. He was born in 1898 in Lourenço Marques (today Maputo) in the Portuguese colony of Mozambique. His father, Alick Pauli was Greek by nationality. By religion he was Greek Orthodox. While Al's mother, born Miriam Ayoub-NeeJame, was Lebanese and Catholic by religion. They met en route to Australia and moved to South Africa. Bowlly was brought up in Joha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Vernon (shore Establishment)
HMS ''Vernon'' was a shore establishment or " stone frigate" of the Royal Navy in Portsmouth. ''Vernon'' was established on 26 April 1876 as the Royal Navy's Torpedo Branch also known as the Torpedo School, named after the ship which served as part of its floating base. After the First World War, HMS ''Vernon'' moved ashore, taking over the Gunwharf site, where it continued to operate until 1 April 1996, when the various elements comprising the establishment were split up and moved to different commands. Foundation and early history The second ship to be called ended her career laid up in Chatham Dockyard as a floating coaling jetty. In 1872 she was moved to become a tender to for torpedo and mining training. In 1874 she was joined by , an iron screw torpedo vessel. ''Vesuvius'' was attached as an Experimental Tender for the conduct of torpedo trials, and remained in the role until 1923. On 26 April 1876 ''Vernon'' was joined by the former steam frigate and the lighte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Navy
The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against France. The modern Royal Navy traces its origins to the early 16th century; the oldest of the UK's armed services, it is consequently known as the Senior Service. From the middle decades of the 17th century, and through the 18th century, the Royal Navy vied with the Dutch Navy and later with the French Navy for maritime supremacy. From the mid 18th century, it was the world's most powerful navy until the Second World War. The Royal Navy played a key part in establishing and defending the British Empire, and four Imperial fortress colonies and a string of imperial bases and coaling stations secured the Royal Navy's ability to assert naval superiority globally. Owing to this historical prominence, it is common, even among non-Britons, to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
London Docks
London Docklands is the riverfront and former docks in London. It is located in inner east and southeast London, in the boroughs of Southwark, Tower Hamlets, Lewisham, Newham, and Greenwich. The docks were formerly part of the Port of London, at one time the world's largest port. After the docks closed, the area had become derelict and poverty-ridden by the 1980s. The Docklands' regeneration began later that decade; it has been redeveloped principally for commercial and residential use. The name "London Docklands" was used for the first time in a government report on redevelopment plans in 1971 and has since been almost universally adopted. The redevelopment created wealth, but also led to some conflict between the new and old communities in the area. Case Study - Inner City Redevelopment - London's Docklands - Internet Geography Establishment In Roman and medieval times, ships arriving in the River Thames tended to dock at small quays in the present-day City o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
