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Estoppey Bombsight
The Estoppey D-series was a line of inter-war era bombsights developed by Georges Estoppey of the US Army Air Corps' McCook Field, starting with the D-1 of 1922. A key feature was the use of a pendulum to keep the bombsight correctly oriented towards the ground even as the aircraft maneuvered, and dashpots to keep it from swinging around in turbulence. In testing in 1923, the D-1 proved more accurate than the US Navy's Mark III or the Army's Mk. I, and twice as accurate as the older Michelin bombsight designs. A series of minor updates led to the first widely used production model, 1925's D-4, of which several hundred were produced. The design was among the most advanced of its era but was still inaccurate to the point of being useless at altitudes over . Estoppey continued working on the design, introducing models for both the Army and Navy. The D-5 of 1929 was a very different design, using the new tachometric concept, but it proved to have even lower accuracy than the D-4 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin MB-2 Bombsight 070205-F-1234P-008 (cropped)
Martin may refer to: Places * Martin City (other) * Martin County (other) * Martin Township (other) Antarctica * Martin Peninsula, Marie Byrd Land * Port Martin, Adelie Land * Point Martin, South Orkney Islands Australia * Martin, Western Australia * Martin Place, Sydney Caribbean * Martin, Saint-Jean-du-Sud, Haiti, a village in the Sud Department of Haiti Europe * Martin, Croatia, a village in Slavonia, Croatia * Martin, Slovakia, a city * Martín del Río, Aragón, Spain * Martin (Val Poschiavo), Switzerland England * Martin, Hampshire * Martin, Kent * Martin, East Lindsey, Lincolnshire, hamlet and former parish in East Lindsey district * Martin, North Kesteven, village and parish in Lincolnshire in North Kesteven district * Martin Hussingtree, Worcestershire * Martin Mere, a lake in Lancashire ** WWT Martin Mere, a wetland nature reserve that includes the lake and surrounding areas * Martin Mill, Kent North America Canada * Rur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground Speed
Ground speed is the horizontal speed of an aircraft relative to the Earth’s surface. It is vital for accurate navigation that the pilot has an estimate of the ground speed that will be achieved during each leg of a flight. An aircraft diving vertically would have a ground speed of zero. Information displayed to passengers through the entertainment system of airline aircraft usually gives the aircraft ground speed rather than airspeed. Ground speed can be determined by the vector sum of the aircraft's true airspeed and the current wind speed and direction; a headwind subtracts from the ground speed, while a tailwind adds to it. Winds at other angles to the heading will have components of either headwind or tailwind as well as a crosswind component. An airspeed indicator indicates the aircraft's speed relative to the air mass. The air mass may be moving over the ground due to wind, and therefore some additional means to provide position over the ground is required. This might ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lend Lease
Lend-Lease, formally the Lend-Lease Act and introduced as An Act to Promote the Defense of the United States (), was a policy under which the United States supplied the United Kingdom, the Soviet Union and other Allied nations with food, oil, and materiel between 1941 and 1945. It was given on the basis that such help was essential for the defense of the United States; this aid included warships and warplanes, along with other weaponry. It was signed into law on March 11, 1941, and ended on September 20, 1945. In general, the aid was free, although some hardware (such as ships) were returned after the war. Canada, already a belligerent, supplemented its aid to Great Britain with a similar, smaller program called Mutual Aid. A total of $50.1 billion (equivalent to $ in ) worth of supplies was shipped, or 17% of the total war expenditures of the U.S. In all, $31.4 billion went to the United Kingdom, $11.3 billion to the Soviet Union, $3.2 billion to France, $1.6 billion to Chi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torpedo Bomber
A torpedo bomber is a military aircraft designed primarily to attack ships with aerial torpedoes. Torpedo bombers came into existence just before the First World War almost as soon as aircraft were built that were capable of carrying the weight of a torpedo, and remained an important aircraft type until they were rendered obsolete by anti-ship missiles. They were an important element in many famous Second World War battles, notably the British attack at Taranto, the sinking of the German battleship ''Bismarck'', and the Japanese attack on Pearl Harbor. Types Torpedo bombers first appeared immediately prior to the First World War. Generally, they carried torpedoes specifically designed for air launch, which were smaller and lighter than those used by submarines and surface warships. Nonetheless, as an airborne torpedo could weigh as much as , more than twice the bomb load of contemporary single-engined bombers, the aircraft carrying it usually needed to be specially design ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dive Bomber
A dive bomber is a bomber aircraft that Dive (aviation), dives directly at its targets in order to provide greater accuracy for the Aerial bomb, bomb it drops. Diving towards the target simplifies the bomb's trajectory and allows the pilot to keep visual contact throughout the bomb run. This allows attacks on point targets and ships, which were difficult to attack with conventional level bombers, even ''en masse''. After World War II, the rise of precision-guided munitions and improved Anti-aircraft warfare, anti-aircraft defences—both fixed gunnery positions and fighter interception—led to a fundamental change in dive bombing. New weapons, such as rockets, allowed for better accuracy from smaller dive angles and from greater distances. They could be fitted to almost any aircraft, including fighter aircraft, fighters, improving their effectiveness without the inherent vulnerabilities of dive bombers, which needed air superiority to operate effectively. Method A dive bom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attack On Pearl Harbor
The attack on Pearl HarborAlso known as the Battle of Pearl Harbor was a surprise military strike by the Imperial Japanese Navy Air Service upon the United States against the naval base at Pearl Harbor in Honolulu, Territory of Hawaii, just before 8:00a.m. (local time) on Sunday, December 7, 1941. The United States was a neutral country at the time; the attack led to its formal entry into World War II the next day. The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning. Japan intended the attack as a preventive action. Its aim was to prevent the United States Pacific Fleet from interfering with its planned military actions in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and those of the United States. Over the course of seven hours there were coordinated Japanese attacks on the US-held Philippines, Guam, and Wake Island and on the B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Cash Register
NCR Corporation, previously known as National Cash Register, is an American software, consulting and technology company providing several professional services and Electronics, electronic products. It manufactures Self-checkout, self-service kiosks, point of sale, point-of-sale terminals, automated teller machines, cheque processing systems, and barcode reader, barcode scanners. NCR was founded in Dayton, Ohio, in 1884 and acquired by American Telephone & Telegraph, AT&T in 1991. A restructuring of AT&T in 1996 led to NCR's re-establishment on 1 January 1997, as a separate company and involved the Corporate spin-off, spin-off of Lucent Technologies from AT&T. In June 2009 the company sold most of the Dayton properties and moved its headquarters to the Atlanta metropolitan area in unincorporated area, unincorporated Gwinnett County, Georgia, near Duluth, Georgia, Duluth. In early January 2018, the new NCR Global Headquarters opened in Midtown Atlanta near Technology Square (Atlant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norden Bombsight
The Norden Mk. XV, known as the Norden M series in U.S. Army service, is a bombsight that was used by the United States Army Air Forces (USAAF) and the United States Navy during World War II, and the United States Air Force in the Korean and the Vietnam Wars. It was an early tachometric design that directly measured the aircraft's ground speed and direction, which older bombsights could only estimate with lengthy manual procedures. The Norden further improved on older designs by using an analog computer that continuously recalculated the bomb's impact point based on changing flight conditions, and an autopilot that reacted quickly and accurately to changes in the wind or other effects. Together, these features promised unprecedented accuracy for daytime bombing from high altitudes. During prewar testing the Norden demonstrated a circular error probable (CEP) of , an astonishing performance for that period. This precision would enable direct attacks on ships, factories, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ball-and-disk Integrator
The ball-and-disk integrator is a key component of many advanced mechanical computers. Through simple mechanical means, it performs continual integration of the value of an input. Typical uses were the measurement of area or volume of material in industrial settings, range-keeping systems on ships, and tachometric bombsights. The addition of the torque amplifier by Vannevar Bush led to the differential analysers of the 1930s and 1940s. Description and operation The basic mechanism consists of two inputs and one output. The first input is a spinning disk, generally electrically driven, and using some sort of governor to ensure that it turns at a fixed rate. The second input is a movable carriage that holds a bearing against the input disk, along its radius. The bearing transfers motion from the disk to an output shaft. The axis of the output shaft is oriented parallel to the rails of the carriage. As the carriage slides, the bearing remains in contact with both the disk & the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sperry Gyroscope
Sperry may refer to: Places In the United States: *Sperry, Iowa, community in Des Moines County * Sperry, Missouri *Sperry, Oklahoma, town in Tulsa County * Sperry Chalet, historic backcountry chalet, Glacier National Park, Montana *Sperry Glacier, located in Glacier National Park in the state of Montana * William Miller Sperry Observatory or Sperry Observatory, an astronomical observatory owned by Union County College and operated by Amateur Astronomers, Incorporated on Union County College on their Cranford, New Jersey campus Sperry Corporation *Sperry Corporation, a former American equipment and electronics manufacturer (1910–1986) **Sperry Gyroscope Company (1910–1933), founded by Elmer Ambrose Sperry ***Lawrence Sperry Aircraft Company (1918–1924), founded by Lawrence Sperry **Sperry Corporation, 1933–1955 **Sperry Rand, 1955–1978 **Sperry Corporation, 1978–1986 *''Honeywell v. Sperry Rand'', a landmark U.S. federal court case that in April 1973 invalidated the 196 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gyroscopic Platform
An inertial platform, also known as a gyroscopic platform or stabilized platform, is a system using gyroscopes to maintain a platform in a fixed orientation in space despite the movement of the vehicle that it is attached to. These can then be used to stabilize gunsights in tanks, anti-aircraft artillery on ships, and as the basis for older mechanically based inertial navigation systems. ''See'' Inertial measurement unit An inertial measurement unit (IMU) is an electronic device that measures and reports a body's specific force, angular rate, and sometimes the orientation of the body, using a combination of accelerometers, gyroscopes, and sometimes magnetometer ... References Aircraft instruments Navigational equipment {{Tool-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Norden
Carl Lucas Norden (April 23, 1880 – June 14, 1965), born Carel Lucas van Norden, was a Dutch-American engineer who invented the Norden bombsight. Biography Norden was born in Semarang, Java. After attending a boarding school in Barneveld, Netherlands, he was educated at the ETH Zürich in Switzerland and then emigrated to the United States in 1904. Along with Elmer Sperry, Norden worked on the first gyrostabilizers for United States ships, and became recognized for his contributions to military hardware. In 1913, he left Sperry to form his own company. In 1920, he began work on the Norden bombsight for the United States Navy. A prototype was available by 1923 and the first bombsight, containing an analog computer, was produced in 1927. Bombardiers were trained in great secrecy on how to use it. The device was used to drop bombs from high-altitude aircraft, accurately enough in practice to hit a 100-foot (30 m) circle from an altitude of 21,000 feet (6,400& ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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