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Kite Balloon
A kite balloon is a tethered balloon which is shaped to help make it stable in low and moderate winds and to increase its lift. It typically comprises a streamlined envelope with stabilising features and a harness or yoke connecting it to the main tether and a second harness connected to an observer's basket. Kite balloons are able to fly in higher winds than ordinary round balloons which tended to bob and spin in windy conditions.Ege, 1973, pp.128–129 They were extensively used for military observation during World War I and similar designs were used for anti-aircraft barriers, as barrage balloons in both world wars. Design and development Developed in Germany from 1893 by Parseval and Sigsfeld ( :de:Hans Bartsch von Sigsfeld), the main component of their kite balloon is its tubular-shaped envelope, similar to that of a non-rigid airship, giving it its British and French nicknames of "sausage". This was inclined at a nose up angle to about 30–40° from the horizontal, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tethered Balloon
A tethered, moored or captive balloon is a balloon that is restrained by one or more tethers attached to the ground so it cannot float freely. The base of the tether is wound around the drum of a winch, which may be fixed or mounted on a vehicle, and is used to raise and lower the balloon. A balloon is a form of aerostat, along with the powered free-flying airship, although the American GAO has used the term "aerostat" to describe a tethered balloon in contrast to the powered airship. Tethered balloons have been used for advertising, recreation, observation, and civil or military uses. Design principles Early balloons were simple round spheres, with a payload hung beneath. The round shape uses the minimum material to accommodate a given volume of lifting gas, making it the lightest construction. However, in any significant wind the round shape is aerodynamically unstable and will bob about, risking damage or the balloon breaking free. To avoid this problem, the kite balloo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nieuport 16
The Nieuport 16 C.1 (or Nieuport XVI C.1 in contemporary sources)The C in the designation indicates that it is a ''chasseur'' or fighter, and the 1 indicates the number of crew members. was a French World War I single-seat sesquiplane fighter aircraft, designed by Gustave Delage as a development of the Nieuport 11 with a more powerful engine. The Nieuport 16's service life coincided with the period when the first air-to-air rockets, the Le Prieur rocket, were used most frequently, and the type has a closer association with them than any other aircraft. Development The Nieuport 16 was an improved Nieuport 11 developed in 1916, with a strengthened airframe powered by a more powerful Le Rhône 9J rotary engine.Durkota, 1995, p.353 Visible differences included a headrest for the pilot and a larger aperture in front of the "horseshoe" cowling. The Nieuport 16 was an interim type pending the delivery of the slightly larger Nieuport 17 C.1, whose design was begun in parallel with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akron, Ohio
Akron () is a city in Summit County, Ohio, United States, and its county seat. It is the List of municipalities in Ohio, fifth-most populous city in Ohio, with a population of 190,469 at the 2020 United States census, 2020 census. The Akron metropolitan area, covering Summit and Portage County, Ohio, Portage counties, had a population of 702,219. It is located on the western edge of the Glaciated Allegheny Plateau in Northeast Ohio about south of downtown Cleveland. First settled in 1810, the city was founded by Simon Perkins and Paul Williams in 1825 along the Cuyahoga River, Little Cuyahoga River at the summit of the developing Ohio and Erie Canal. The name is derived from the Greek language, Greek word (), signifying a summit or high point. It was briefly renamed South Akron after Eliakim Crosby founded nearby North Akron in 1833, until both merged into an incorporated village in 1836. In the 1910s, Akron doubled in population, making it the nation's fastest-growing city. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goodyear Tire And Rubber Company
The Goodyear Tire & Rubber Company is an American multinational tire manufacturer headquartered in Akron, Ohio. Goodyear manufactures tires for passenger vehicles, aviation, commercial trucks, military and police vehicles, motorcycles, recreational vehicles, race cars, and heavy off-road machinery. It also licenses the Goodyear brand to bicycle tire manufacturers, returning from a break in production between 1976 and 2015. As of 2017, Goodyear is one of the top five tire manufacturers along with Bridgestone (Japan), Michelin (France), Pirelli (Italian) and Continental AG, Continental (Germany). Founded in 1898 by Frank Seiberling, the company was named after American Charles Goodyear (1800–1860), inventor of Vulcanization, vulcanized rubber. The first Goodyear tires became popular because they were easily detachable and required little maintenance. Though Goodyear had been manufacturing airships and balloons since the early 1900s, the first Goodyear Blimp, Goodyear advertising ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 million tons in 2021. It has the world's largest aircraft carrier fleet, with List of aircraft carriers in service, eleven in service, one undergoing trials, two new carriers under construction, and six other carriers planned as of 2024. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the U.S. Navy is the third largest of the United States military service branches in terms of personnel. It has 299 deployable combat vessels and about 4,012 operational aircraft as of 18 July 2023. The U.S. Navy is one of six United States Armed Forces, armed forces of the United States and one of eight uniformed services of the United States. The United States Navy traces its origins to the Continental Navy, which was established during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sonar
Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging), communicate with or detect objects on or under the surface of the water, such as other vessels. "Sonar" can refer to one of two types of technology: ''passive'' sonar means listening for the sound made by vessels; ''active'' sonar means emitting pulses of sounds and listening for echoes. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used for robot navigation, and sodar (an upward-looking in-air sonar) is used for atmospheric investigations. The term ''sonar'' is also used for the equipment used to generate and receive the sound. The acoustic frequencies used in sonar systems vary from very low ( infrasonic) to e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Naval Institute
The United States Naval Institute (USNI) is a private non-profit military association that offers independent, nonpartisan forums for debate of national security issues. In addition to publishing magazines and books, the Naval Institute holds several annual conferences. The Naval Institute is based in Annapolis, Maryland. Established in 1873, the Naval Institute claimed "almost 50,000 members" in 2020, mostly active and retired personnel of the United States Navy, Marine Corps and Coast Guard. The organization also has members in over 90 countries. The organization has no official or funding ties to the United States Naval Academy or the United States Navy, though it is based on the grounds of the Naval Academy through permission granted by a 1936 Act of Congress. History The United States Naval Institute was formed on October 9, 1873, by 15 naval officers gathered at the Naval Academy's Department of Physics and Chemistry building in Annapolis to discuss, among other top ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proceedings (magazine)
''Proceedings'' is a 96-page monthly magazine published by the U.S. Naval Institute. Launched in 1874, it is one of the oldest continuously published magazines in the United States. ''Proceedings'' covers topics concerning global security and includes articles from military professionals and civilian experts, historical essays, book reviews, full-color photography, and reader commentary. Roughly a third are written by active-duty personnel, a third by retired military, and a third by civilians. ''Proceedings'' also frequently carries feature articles by Secretaries of Defense, Secretaries of the Navy, Chairmen of the Joint Chiefs of Staff, and top leaders of the Navy, Marine Corps and Coast Guard. Notable contributors Over the decades many notable names have contributed articles to ''Proceedings'' either early in their careers or when they reached the upper echelons of leadership, and in many cases, both. * Tom Clancy, best-selling author of techno-thrillers such as '' The Hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Depth Charge
A depth charge is an anti-submarine warfare (ASW) weapon designed to destroy submarine A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...s by detonating in the water near the target and subjecting it to a destructive shock factor, hydraulic shock. Most depth charges use high explosives with a fuze set to detonate the charge, typically at a specific depth from the surface. Depth charges can be dropped by ships (typically fast, agile surface combatants such as destroyers or frigates), patrol aircraft and helicopters. Depth charges were developed during World War I, and were one of the first viable methods of attacking a submarine underwater. They were widely used in World War I and World War II, and remained part of the anti-submarine arsenals of many navies during the Cold War, duri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convoy
A convoy is a group of vehicles, typically motor vehicles or ships, traveling together for mutual support and protection. Often, a convoy is organized with armed defensive support and can help maintain cohesion within a unit. It may also be used in a non-military sense, for example when driving through remote areas. Naval convoys Age of Sail Naval convoys have been in use for centuries, with examples of merchant ships traveling under naval protection dating to the 12th century. The use of organized naval convoys dates from when ships began to be separated into specialist classes and national navies were established. By the French Revolutionary Wars of the late 18th century, effective naval convoy tactics had been developed to ward off pirates and privateers. Some convoys contained several hundred merchant ships. The most enduring system of convoys were the Spanish treasure fleets, that sailed from the 1520s until 1790. When merchant ships sailed independently, a privateer c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Destroyer
In naval terminology, a destroyer is a fast, maneuverable, long-endurance warship intended to escort larger vessels in a fleet, convoy, or carrier battle group and defend them against a wide range of general threats. They were conceived in 1885 by Fernando Villaamil for the Spanish NavySmith, Charles Edgar: ''A short history of naval and marine engineering.'' Babcock & Wilcox, ltd. at the University Press, 1937, page 263 as a defense against torpedo boats, and by the time of the Russo-Japanese War in 1904, these "torpedo boat destroyers" (TBDs) were "large, swift, and powerfully armed torpedo boats designed to destroy other torpedo boats". Although the term "destroyer" had been used interchangeably with "TBD" and "torpedo boat destroyer" by navies since 1892, the term "torpedo boat destroyer" had been generally shortened to simply "destroyer" by nearly all navies by the First World War. Before World War II, destroyers were light vessels with little endurance for unatte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic U-boat Campaign Of World War I
The Atlantic U-boat campaign of World War I (sometimes called the "First Battle of the Atlantic", in reference to the World War II campaign Battle of the Atlantic, of that name) was the prolonged naval conflict between German submarines and the Allies of World War I, Allied navies in Atlantic waters the North Sea, the seas around the British Isles, and the coast of France. Initially the U-boat campaign was directed against the warships of the British Grand Fleet. Later U-boat fleet action was extended to include action against the trade routes of the Allied powers. This campaign was highly destructive, and resulted in the loss of nearly half of Britain's initial merchant marine fleet during the course of the war. To counter the German submarines, the Allies moved shipping into convoys guarded by destroyers, blockades such as the Dover Barrage and minefields such as the North Sea Mine Barrage were laid, and aircraft patrols monitored the U-boat bases. Increased ship construction m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
