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Ground-controlled Approach
In aviation, a ground-controlled approach (GCA) is a type of service provided by air-traffic controllers whereby they guide aircraft to a safe landing, including in adverse weather conditions, based on primary radar images. Most commonly, a GCA uses information from either a precision approach radar (PAR, for precision approaches with vertical glidepath guidance) or an airport surveillance radar (ASR, providing a non-precision surveillance radar approach with no glidepath guidance). The term GCA may refer to any type of ground radar guided approach such as a PAR, PAR without glideslope or ASR. An approach using ASR is known as a surveillance approach. When both vertical and horizontal guidance from the PAR is given, the approach is termed a precision approach. If no PAR glidepath is given, even if PAR equipment is used for lateral guidance, it is considered a non-precision approach. History Early experiments The GCA concept was originally developed by nuclear physicist Luis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Aviation
Aviation includes the activities surrounding mechanical flight and the aircraft industry. ''Aircraft'' include fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air aircraft such as hot air balloons and airships. Aviation began in the 18th century with the development of the hot air balloon, an apparatus capable of atmospheric displacement through buoyancy. Clément Ader built the "Ader Éole" in France and made an uncontrolled, powered hop in 1890. This was the first powered aircraft, although it did not achieve controlled flight. Some of the most significant advancements in aviation technology came with the controlled gliding flying of Otto Lilienthal in 1896. A major leap followed with the construction of the '' Wright Flyer'', the first powered airplane by the Wright brothers in the early 1900s. Since that time, aviation has been technologically revolutionized by the introduction of the jet engine which enabl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Pasquotank River
The Pasquotank River , from the North Carolina Collection's website at the University of North Carolina at Chapel Hill. Retrieved 2012-09-18. is a coastal water-body in Northeastern North Carolina in the United States. Located between Camden County, North Carolina, Camden and Pasquotank County, North Carolina, Pasquotank counties, the Pasquotank connects directly to Albemarle Sound and is part of the Intracoastal Waterway via Elizabeth City. Machelhe Island is a river island on the Pasquotank River. History The name "Pasquotank" is derived from ''pashetanki'', a Carolina Algonquian language, Carolina Algonquian word translated as "where the current forks." The river was originally controlled by the Secotan people, and later gained importance in trade and shipping during the Province of Carolina ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Washington National Airport
Ronald Reagan Washington National Airport is a public airport in Arlington County, Virginia, United States, from Washington, D.C. The closest airport to the nation's capital, it is one of two airports owned by the federal government and operated by the Metropolitan Washington Airports Authority (MWAA) that serve the Washington metropolitan area; the other is Dulles International Airport (IAD), located about to the west in Fairfax and Loudoun counties. The airport opened in 1941 and was originally named Washington National Airport. Part of the original terminal is still in use as Terminal 1. The much larger Terminal 2 opened in 1997. In 1998, Congress passed and President Bill Clinton signed a bill renaming the airport in honor of the 40th president of the United States, Ronald Reagan, who was in office from 1981 to 1989. Reagan National serves 98 nonstop destinations . It is a hub for American Airlines. The airport hosts international flights, but has no immigration and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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The Pentagon
The Pentagon is the headquarters building of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was constructed on an accelerated schedule during World War II. As a symbol of the United States Armed Forces, U.S. military, the phrase ''The Pentagon'' is often used as a metonym for the Department of Defense and its leadership. The building was designed by American architect George Bergstrom and built by contractor John McShain. Ground was broken on 11 September 1941, and the building was dedicated on 15 January 1943. General Brehon Somervell provided the major impetus to gain Congressional approval for the project. Colonel Leslie Groves was responsible for overseeing the project for the United States Army Corps of Engineers, U.S. Army Corps of Engineers, which supervised it. The Pentagon is List of largest office buildings, the world's second-largest office building, with about of floor space, of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Consolidated PBY Catalina
The Consolidated Model 28, more commonly known as the PBY Catalina (U.S. Navy designation), is a flying boat and amphibious aircraft designed by Consolidated Aircraft in the 1930s and 1940s. In U.S. Army service, it was designated as the OA-10 and in Canadian service as the Canso, and it later received the NATO reporting name Mop. It was one of the most widely used seaplanes of World War II. Catalinas served with every branch of the United States Armed Forces and in the air forces and navies of many other nations. The last military PBYs served until the 1980s. As of 2021, 86 years after its first flight, the aircraft continues to fly as a Aerial firefighting#Water bombers, waterbomber (or airtanker) in aerial firefighting operations in some parts of the world. Design and development Background The PBY was originally designed to be a Maritime patrol aircraft, patrol bomber, an aircraft with a long operational Range (aeronautics), range intended to locate and attack enemy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Beechcraft Model 18
The Beechcraft Model 18 (or "Twin Beech", as it is also known) is a 6- to 11-seat, twin-engined, low-wing, tailwheel light aircraft manufactured by the Beechcraft, Beech Aircraft Corporation of Wichita, Kansas. Continuously produced from 1937 to November 1969 (over 32 years, a world record at the time), over 9,000 were built, making it one of the world's most widely used light aircraft. Sold worldwide as a civilian executive, utility, cargo aircraft, and passenger airliner on tailwheels, nosewheels, skis, or floats, it was also used as a military aircraft."Beechcraft D18S Twin Beech." ''National Air and Space Museum'' of the Smithsonian Institution, Washington, D.C. Retrieved: 17 December 2014. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Quonset Point Air National Guard Station
Quonset Point Air National Guard Station is the home base of the Rhode Island Air National Guard 143rd Airlift Wing. Naval Air Station (NAS) Quonset Point was a United States Naval Base in Quonset Point, Rhode Island that was deactivated in 1974. Next to NAS Quonset Point was Camp Endicott at Davisville, home of the Naval Construction Battalions known as the Seabees. Quonset Point also gave its name to the Quonset hut, a standardized prefabricated building used by the U.S. military starting in World War II. Former US President Richard M. Nixon went through basic naval officer training at Quonset Point in 1942. History U.S. Navy use Commissioned on 12 July 1941, and encompassing what was once Camp Dyer, NAS Quonset Point was a major naval facility throughout World War II. Beginning in 1943, pilots of the Royal Navy's Fleet Air Arm were trained at Quonset Point to fly the Vought F4U Corsair, which was then brought into service on British aircraft carriers. Squadrons such as V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Gilfillan Brothers
Gilfillan is a Scottish surname. Notable people with the name include: * Andrew Gilfillan (born 1959), South African cricketer * Bobby Gilfillan (footballer born 1926) (died 2018), Scottish professional footballer * Bobby Gilfillan (footballer born 1938) (died 2012), Scottish professional footballer * Bryan Gilfillan (born 1984), Scottish football manager and former player * Calvin Willard Gilfillan (1832–1901), US Congressman * Ceris Gilfillan (born 1980), British racing cyclist * Charles Duncan Gilfillan (1831–1902), American lawyer, businessman, and politician * Douglas Gilfillan (1865–1948), South African lawyer and plant collector * Francis Gilfillan (1872–1933), Irish-American prelate * Rev. George Gilfillan (1813–1878), Scottish poet and critic * Gordon Gilfillan (1916–1982), Australian pastoralist and politician * Hector Gilfillan (1903–1970), English footballer * Ian Gilfillan (born 1932), Australian politician * James Gilfillan (1836& ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Office Of Scientific Research And Development
The Office of Scientific Research and Development (OSRD) was an agency of the United States federal government created to coordinate scientific research for military purposes during World War II. Arrangements were made for its creation during May 1941, and it was created formally by Executive Order 8807 on June 28, 1941. It superseded the work of the National Defense Research Committee (NDRC), was given almost unlimited access to funding and resources, and was directed by Vannevar Bush, who reported only to President Franklin Delano Roosevelt. The research was widely varied, and included projects devoted to new and more accurate bombs, reliable detonators, work on the proximity fuze, guided missiles, radar and early-warning systems, lighter and more accurate hand weapons, more effective medical treatments (including work to make penicillin at scale, which was necessary for its use as a drug), more versatile vehicles, and, the most secret of all, the S-1 Section, which later becam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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US Army Air Forces
The United States Army Air Forces (USAAF or AAF) was the major land-based aerial warfare service component of the United States Army and ''de facto'' aerial warfare service branch of the United States during and immediately after World War II (1941–1947). It was created on 20 June 1941 as successor to the previous United States Army Air Corps and is the direct predecessor of the United States Air Force, today one of the six armed forces of the United States. The AAF was a component of the United States Army, which on 2 March 1942 was divided functionally by executive order into three autonomous forces: the Army Ground Forces, the United States Army Services of Supply (which in 1943 became the Army Service Forces), and the Army Air Forces. Each of these forces had a commanding general who reported directly to the Army Chief of Staff. The AAF administered all parts of military aviation formerly distributed among the Air Corps, General Headquarters Air Force, and the groun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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Waveguide
A waveguide is a structure that guides waves by restricting the transmission of energy to one direction. Common types of waveguides include acoustic waveguides which direct sound, optical waveguides which direct light, and radio-frequency waveguides which direct electromagnetic waves other than light like radio waves. Without the physical constraint of a waveguide, waves would expand into three-dimensional space and their intensities would decrease according to the inverse square law. There are different types of waveguides for different types of waves. The original and most common meaning is a hollow conductive metal pipe used to carry high frequency radio waves, particularly microwaves. Dielectric waveguides are used at higher radio frequencies, and transparent dielectric waveguides and optical fibers serve as waveguides for light. In acoustics, air ducts and horns are used as waveguides for sound in musical instruments and loudspeakers, and specially-shaped metal rod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |