|
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 The Luftwaffe () was the aerial warfare, aerial-warfare branch of the before and during World War II. German Empire, Germany's military air arms during World War I, the of the Imperial German Army, Imperial Army and the of the Imperial Ge ... and initially by the Royal Air Force (RAF) RAF Bomber Command, 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 , w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
German Parachute Mine
German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also German nationality law **Germanic peoples (Roman era) *German diaspora * German language * 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), "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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
The Blitz
The Blitz (English: "flash") was a Nazi Germany, German bombing campaign against the United Kingdom, for eight months, from 7 September 1940 to 11 May 1941, during the Second World War. Towards the end of the Battle of Britain in 1940, a contest for daylight air superiority over the United Kingdom between the and the Royal Air Force, Germany began conducting mass air attacks against British cities, beginning with London, in an attempt to draw the RAF Fighter Command into a battle of annihilation.Price 1990, p. 12. Adolf Hitler and Hermann Göring, commander-in-chief of the Luftwaffe, ordered the new policy on 6 September 1940. From 7 September 1940, London was systematically bombed by the Luftwaffe for 56 of the following 57 days and nights. Notable attacks included a large daylight attack against London on Battle of Britain Day, 15 September, a large raid on 29 December 1940 against London -- resulting in a firestorm known as the Second Great Fire of London,Hooton 1997, p. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Gardening (cryptanalysis)
In cryptanalysis, gardening is the act of encouraging a target to use known plaintext in an encrypted message, typically by performing some action the target is sure to report. It was a term used during World War II at the British Government Code and Cypher School at Bletchley Park, England, for schemes to entice the Germans to include particular words, which the British called " cribs", in their encrypted messages. This term presumably came from RAF minelaying missions, or "gardening" sorties. "Gardening" was standard RAF slang for sowing mines in rivers, ports and oceans from low heights, possibly because each sea area around the European coasts was given a code-name of flowers or vegetables. The technique is claimed to have been most effective against messages produced by the German Navy's Enigma machines. If the Germans had recently swept a particular area for mines, and analysts at Bletchley Park were in need of some cribs, they might (and apparently did on several occas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Short Stirling
The Short Stirling was a British four-engined heavy bomber of the Second World War. It has the distinction of being the first four-engined bomber to be introduced into service with the Royal Air Force (RAF) during the war (the earlier Handley Page V/1500 being a WWI design that served during the 1920s). The Stirling was designed during the late 1930s by Short Brothers to conform with the requirements laid out in Air Ministry Specification B.12/36. Prior to this, the RAF had been primarily interested in developing increasingly capable twin-engined bombers, but had been persuaded to investigate a prospective four-engined bomber as a result of promising foreign developments in the field. Out of the submissions made to the specification, Supermarine proposed the Type 317, which was viewed as the favourite, whereas Short's submission, named the S.29, was selected as an alternative. When the preferred Type 317 had to be abandoned, the S.29, which later received the name Stirling, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
RAF Coastal Command
RAF Coastal Command was a formation within the Royal Air Force (RAF). It was founded in 1936, when the RAF was restructured into Fighter, Bomber and Coastal commands and played an important role during the Second World War. Maritime Aviation had been neglected in the inter-war period, due to disagreements between the Royal Navy (RN) and RAF over the ownership, roles and investment in maritime air power.Buckley, 2018. p.85 The Admiralty's main concern until 1937 was the return of the Fleet Air Arm to the Royal Navy while the RAF concentrated on the development of a bombing force to provide a deterrent. Coastal Command was referred to as the "Cinderella Service" by A V Alexander, the First Lord of the Admiralty in November 1940. Soon after RAF Coastal Area was elevated to Coastal Command, its headquarters moved from Lee-on-Solent to Northwood in northwest London. During the Second World War, Coastal Command's most important contribution was the protection of Allied convoys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Blockade Of Germany (1939–1945)
The Blockade of Germany (1939–1945), also known as the Economic War, involved operations carried out during World War II by the British Empire and by France during World War II, France in order to restrict the supplies of minerals, Oil campaign of World War II, fuel, metals, food and textiles needed by Nazi Germany – and later by Fascist Italy – in order to sustain their war efforts. The economic war consisted mainly of a naval blockade, which formed part of the wider Battle of the Atlantic, but also included the Strategic bombing during World War II, bombing of economically important targets and the preclusive buying of war materials from neutral countries in order to prevent their sale to the Axis powers. * The first period, from the beginning of European hostilities in September 1939 to the end of the "Phoney War", saw both the Allies of World War II, Allies and the Axis powers intercepting neutral merchant ships to seize deliveries ''en route'' to their respective enem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
178 Squadron RAF Liberator Being Armed With Mines
Year 178 ( CLXXVIII) was a common year starting on Wednesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Scipio and Rufus (or, less frequently, year 931 ''Ab urbe condita''). The denomination 178 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Bruttia Crispina marries Commodus, and receives the title of '' Augusta''. * Emperor Marcus Aurelius and his son Commodus arrive at Carnuntum in Pannonia, and travel to the Danube to fight against the Marcomanni. Asia * Last (7th) year of ''Xiping'' era and start of ''Guanghe'' era of the Chinese Han dynasty. * In India, the decline of the Kushan Empire begins. The Sassanides take over Central Asia. Religion * The Montanist heresy is condemned for the first time. Births * Lü Meng, Chinese general (d. 220) * Peng Yang, Chinese official (d. 214) * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Photodetector
Photodetectors, also called photosensors, are devices that detect light or other forms of electromagnetic radiation and convert it into an electrical signal. They are essential in a wide range of applications, from digital imaging and optical communication to scientific research and industrial automation. Photodetectors can be classified by their mechanism of detection, such as the photoelectric effect, photochemical reactions, or thermal effects, or by performance metrics like spectral response. Common types include photodiodes, phototransistors, and photomultiplier tubes, each suited to specific uses. Solar cells, which convert light into electricity, are also a type of photodetector. This article explores the principles behind photodetectors, their various types, applications, and recent advancements in the field. History The development of photodetectors began with the discovery of the photoelectric effect by Heinrich Hertz in 1887, later explained by Albert Einst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Bakelite
Bakelite ( ), formally , is a thermosetting polymer, thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde. The first plastic made from synthetic components, it was developed by Belgian chemist Leo Baekeland in Yonkers, New York, in 1907, and patented on December 7, 1909. Bakelite was one of the first plastic-like materials to be introduced into the modern world and was popular because it could be Molding (process), molded and then hardened into any shape. Because of its electrical nonconductor, 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 f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Victoria Hall Disaster
The Victoria Hall disaster occurred on 16 June 1883 at the Victoria Hall in Sunderland, England, when the distribution of free toys caused a crowd crush resulting in 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 show's end, 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 do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Al Bowlly
Albert Allick Bowlly (7 January 1899 – 17 April 1941) was a South African-British vocalist, crooner, and dance band guitarist who was Britain's most popular singer for most of the 1930s. He recorded upwards of 1,000 songs that were listened to by millions and even crossed over to the United States. 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 lyrics by Albert Mellor. Early life He was born in 1899 in Lourenço Marques (today Maputo) in the Portuguese colony of Mozambique. Al's father, Alick, was an Orthodox Christian who was Greek by nationality. His mother, born Miriam Ayoub, was a Lebanese Catholic, though Al himself was raised Greek Orthodox. They met en route to Australia and moved to British South Africa. Bowlly was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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 lighter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
