|
Barrage Balloon
A barrage balloon is a type of airborne barrage, a large uncrewed tethered balloon used to defend ground targets against aircraft attack, by raising aloft steel cables which pose a severe risk of collision with hostile aircraft, making the attacker's approach difficult and hazardous. Early barrage balloons were often spherical. The kite balloon, having a shape and cable bridling that stabilizes the balloon and reduces drag, could be operated at higher wind speeds than a spherical balloon. Some examples carried small explosive charges that would be pulled up against the aircraft to ensure its destruction. Barrage balloons are not practical at higher altitudes due in large part to the cable's weight. First World War France, Germany, Italy, and the United Kingdom used barrage balloons in the First World War. While the French and German forces developed kite balloons, early British barrage balloons were spherical. Sometimes, especially around London, several balloons were used t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
320th Barrage Balloon Battalion
The 320th Barrage Balloon Battalion was an African American United States Army unit that saw combat in Europe during World War II. History The 320th Barrage Balloon Battalion was a VLA (Very Low Altitude) barrage balloon battalion. It "was raised up in 1942 just a year after the Coast Artillery Corps took over responsibility for barrage balloons from the Army Air Corps." The 320th trained at Camp Tyson in Paris, Tennessee. In November 1943, they relocated to England to prepare for the invasion of Europe. Their first assignment was Utah and Omaha beaches on 6 June 1944 (the D-Day invasion). The mission of the 621-man assault force was to raise hydrogen-filled barrage balloons to protect assaulting infantry and armor from being strafed by enemy aircraft. "They flew at an altitude of around 200 feet to defend soldiers landing on the beaches against strafing attacks by German aircraft." A commendation by Supreme Allied Commander Gen. Dwight D. Eisenhower cited the unit for co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Barrage Balloon Fsac 1a35100
Barrage may refer to: Entertainment * Barrage (Barrage album), ''Barrage'' (Barrage album), by band Barrage * Barrage (Paul Bley album), ''Barrage'' (Paul Bley album), 1965 * Barrage (group), a Canadian violin ensemble * Barrage (film), ''Barrage'' (film), a 2017 film * Barrage (manga), ''Barrage'' (manga), a 2012 shōnen manga by Kōhei Horikoshi * Barrage (DC Comics), a character from DC Comics * Barrage (Marvel Comics), a character from Marvel Comics Other uses * Barrage (military science), a wide range of structures, devices, or measures for destroying something to constrain or impede the movement of troops and forces. * Barrage (artillery), a line or barrier of artillery or depth charge fire * Barrage (dam), a type of dam * Barrage balloon, a tethered balloon used as an obstacle to attacking aircraft * Tidal barrage, an artificial obstruction at the mouth of a tidal watercourse {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Omaha Beach
Omaha Beach was one of five beach landing sectors of the amphibious assault component of Operation Overlord during the Second World War. On June 6, 1944, the Allies of World War II, Allies invaded German military administration in occupied France during World War II, German-occupied France with the Normandy landings. "Omaha" refers to an section of the coast of Normandy, France, facing the English Channel, from west of Sainte-Honorine-des-Pertes to east of Vierville-sur-Mer on the right bank of the Douve river estuary. Landings here were necessary to link the British landings to the east at Gold Beach, Gold with the American landing to the west at Utah Beach, Utah, thus providing a continuous lodgement on the Normandy coast of the Baie de Seine (Bay of the Seine River). Taking Omaha was to be the responsibility of United States Army troops, with sea transport, and List of ships in Omaha Bombardment Group, a naval bombardment force provided predominantly by the United States Nav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Manufacturing
Manufacturing is the creation or production of goods with the help of equipment, labor, machines, tools, and chemical or biological processing or formulation. It is the essence of the secondary sector of the economy. The term may refer to a range of human activity, from handicraft to high-tech, but it is most commonly applied to industrial design, in which raw materials from the primary sector are transformed into finished goods on a large scale. Such goods may be sold to other manufacturers for the production of other more complex products (such as aircraft, household appliances, furniture, sports equipment or automobiles), or distributed via the tertiary industry to end users and consumers (usually through wholesalers, who in turn sell to retailers, who then sell them to individual customers). Manufacturing engineering is the field of engineering that designs and optimizes the manufacturing process, or the steps through which raw materials are transformed i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Mining
Mining is the Resource extraction, extraction of valuable geological materials and minerals from the surface of the Earth. Mining is required to obtain most materials that cannot be grown through agriculture, agricultural processes, or feasibly created Chemical synthesis, artificially in a laboratory or factory. Ores recovered by mining include Metal#Extraction, metals, coal, oil shale, gemstones, limestone, chalk mining, chalk, dimension stone, rock salt, potash, gravel, and clay. The ore must be a rock or mineral that contains valuable constituent, can be extracted or mined and sold for profit. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even fossil water, water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and final mine reclamation, reclamation or restoration of the land after the mine is closed. Mining ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Electric Power Transmission
Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. The interconnected lines that facilitate this movement form a ''transmission network''. This is distinct from the local wiring between high-voltage substations and customers, which is typically referred to as electric power distribution. The combined transmission and distribution network is part of electricity delivery, known as the electrical grid. Efficient long-distance transmission of electric power requires high voltages. This reduces the losses produced by strong currents. Transmission lines use either alternating current (AC) or direct current (DC). The voltage level is changed with transformers. The voltage is stepped up for transmission, then reduced for local distribution. A wide area synchronous grid, known as an ''interconnection'' in North America, directly connects generators delivering AC power with the same rela ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Short-circuit
A short circuit (sometimes abbreviated to short or s/c) is an electrical circuit that allows a current to travel along an unintended path with no or very low electrical impedance. This results in an excessive current flowing through the circuit. The opposite of a short circuit is an open circuit, which is an infinite resistance (or very high impedance) between two nodes. Definition A short circuit is an abnormal connection between two nodes of an electric circuit intended to be at different voltages. This results in an electric current limited only by the Thévenin equivalent resistance of the rest of the network which can cause circuit damage, overheating, fire or explosion. Although usually the result of a fault, there are cases where short circuits are caused intentionally, for example, for the purpose of voltage-sensing crowbar circuit protectors. In circuit analysis, a ''short circuit'' is defined as a connection between two nodes that forces them to be at the same ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Great Lakes
The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Lake Superior, Superior, Lake Michigan, Michigan, Lake Huron, Huron, Lake Erie, Erie, and Lake Ontario, Ontario (though hydrologically, Lake Michigan–Huron, Michigan and Huron are a single body of water, joined at the Straits of Mackinac). The Great Lakes Waterway enables modern travel and shipping by water among the lakes. The lakes connect to the Atlantic Ocean via the Saint Lawrence River, and to the Mississippi River basin through the Illinois Waterway. The Great Lakes are the largest group of freshwater lakes on Earth by total area and the second-largest by total volume. They contain 21% of the world's surface fresh water by volume. The total surface is , and the total volume (measured at the low water datum) is , slightly less than the volume of Lake Baikal (, 22–23% of the world's surface f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Sault Ste
Sault may refer to: Places in Europe * Sault, Vaucluse, France * Saint-Benoît-du-Sault, France * Canton of Sault, France * Canton of Saint-Benoît-du-Sault, France * Sault-Brénaz, France * Sault-de-Navailles, France * Sault-lès-Rethel, France * Sault-Saint-Remy, France Places in North America * Sault Ste. Marie, a cross-border region in Canada and the United States ** Sault Ste. Marie, Ontario, Canada ** Sault Ste. Marie, Michigan, United States * Sault College, Ontario, Canada * Sault Ste. Marie Canal, a National Historic Site of Canada in Sault Ste. Marie, Ontario * Sault Locks or Soo Locks, a set of parallel locks which enable ships to travel between Lake Superior and the lower Great Lakes operated and maintained by the United States Army Corps of Engineers * Long Sault, a rapid in the St. Lawrence River * Long Sault, Ontario, Canada * Sault-au-Récollet, Montreal, Quebec, Canada * Grand Sault or Grand Falls, New Brunswick, Canada People with the surnam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States asserts sovereignty over five Territories of the United States, major island territories and United States Minor Outlying Islands, various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's List of countries and dependencies by area, third-largest land area and List of countries and dependencies by population, third-largest population, exceeding 340 million. Its three Metropolitan statistical areas by population, largest metropolitan areas are New York metropolitan area, New York, Greater Los Angeles, Los Angel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Canadians
Canadians () are people identified with the country of Canada. This connection may be residential, legal, historical or cultural. For most Canadians, many (or all) of these connections exist and are collectively the source of their being ''Canadian''. Canada is a multilingual and multicultural society home to people of groups of many different ethnic, religious, and national origins, with the majority of the population made up of Old World immigrants and their descendants. Following the initial period of French and then the much larger British colonization, different waves (or peaks) of immigration and settlement of non-indigenous peoples took place over the course of nearly two centuries and continue today. Elements of Indigenous, French, British, and more recent immigrant customs, languages, and religions have combined to form the culture of Canada, and thus a Canadian identity and Canadian values. Canada has also been strongly influenced by its linguistic, geograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Grumman Avenger
The Grumman TBF Avenger (designated TBM for aircraft manufactured by General Motors) is an American World War II-era torpedo bomber developed initially for the United States Navy and Marine Corps, and eventually used by several air and naval aviation services around the world. The Avenger entered U.S. service in 1942, and first saw action during the Battle of Midway. Despite the loss of five of the six Avengers on its combat debut, it survived in service to become the most effective submarine killer and most widely-used torpedo bomber of World War II, sharing credit for sinking the super-battleships and and being credited for sinking 30 submarines. Greatly modified after the war, it remained in use until the 1960s.Wheeler 1992, p. 53. From 1942-on, production of the Avenger (in fact nearly three quarters of its the total production) was subcontracted to a purposely established division of General Motors: the Eastern Aircraft Division. Design and development The Douglas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
