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Aviation includes the activities surrounding mechanical flight and the aircraft industry. Aircraft includes fixed-wing and rotary-wing types, morphable wings, wing-less lifting bodies, as well as lighter-than-air craft 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. Some of the most significant advancements in aviation technology came with the controlled gliding flying of Otto Lilienthal in 1896; then a large step in significance came with the construction of 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 which permitted a major form of transport throughout the world. (Full article...)
Wind shear itself is a microscale meteorological phenomenon occurring over a very small distance, but it can be associated with mesoscale or synoptic scale weather features such as squall lines and cold fronts. It is commonly observed near microbursts and downbursts caused by thunderstorms, weather fronts, areas of locally higher low level winds referred to as low level jets, near mountains, radiation inversions that occur due to clear skies and calm winds, buildings, wind turbines, and sailboats. Wind shear has a significant effect during take-off and landing of aircraft due to their effects on steering of the aircraft, and was a significant cause of aircraft accidents involving large loss of life within the United States.
Sound movement through the atmosphere is affected by wind shear, which can bend the wave front, causing sounds to be heard where they normally would not, or vice versa. Strong vertical wind shear within the troposphere also inhibits tropical cyclone development, but helps to organize individual thunderstorms into living longer life cycles which can then produce severe weather. The thermal wind concept explains with how differences in wind speed with height are dependent on horizontal temperature differences, and explains the existence of the jet stream. (Full article...)
...that five USAAF airmen were awarded the Medal of Honor following Operation Tidal Wave, a low-level bombing of Romanian oil refineries on 1 August 1943? ...that the Tenerife disaster remained the deadliest aircraft incident in history until the September 11, 2001 attacks and neither plane was in flight when the accident occurred. ...that the strategic bombing campaign used in the 1990 Operation Instant Thunder served as a model for subsequent American military conflicts?
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By 1919 Earhart had enrolled at Columbia University to study pre-med but quit a year later to be with her parents in California. Later in Long Beach she and her father went to a stunt-flying exhibition and the next day she went on a ten minute flight.
Earhart had her first flying lesson at Kinner Field near Long Beach. Her teacher was Anita Snook, a pioneer female aviator. Six months later Earhart purchased a yellow Kinner Airster biplane which she named "Canary". On October 22, 1922, she flew it to an altitude of 14,000 feet, setting a women's world record.
After Charles Lindbergh's solo flight across the Atlantic in 1927, Amy Guest, a wealthy American living in London, England expressed interest in being the first woman to fly (or be flown) across the Atlantic Ocean, but after deciding the trip was too dangerous to make herself, she offered to sponsor the project, suggesting they find "another girl with the right image." While at work one afternoon in April 1928 Earhart got a phone call from a man who asked her, "Would you like to fly the Atlantic?"
The McDonnell Douglas F-4 Phantom II is a two-seat, twin-engined, all-weather, long-range supersonic fighter-bomber originally developed for the U.S. Navy by McDonnell Aircraft. Proving highly adaptable, it became a major part of the air wings of the U.S. Navy, U.S. Marine Corps, and U.S. Air Force. It was used extensively by all three of these services during the Vietnam War, serving as the principal air superiority fighter for both the Navy and Air Force, as well as being important in the ground-attack and reconnaissance roles by the close of U.S. involvement in the war.
First entering service in 1960, the Phantom continued to form a major part of U.S. military air power throughout the 1970s and 1980s, being gradually replaced by more modern aircraft such as the F-15 Eagle and F-16 Fighting Falcon in the U.S. Air Force; the F-14 Tomcat and F/A-18 Hornet in the U.S. Navy; and the F/A-18 in the U.S. Marine Corps. It remained in use by the U.S. in the reconnaissance and Wild Weasel roles in the 1991 Gulf War, finally leaving service in 1996. The Phantom was also operated by the armed forces of 11 other nations. Israeli Phantoms saw extensive combat in several Arab–Israeli conflicts, while Iran used its large fleet of Phantoms in the Iran–Iraq War. Phantoms remain in front line service with seven countries, and in use as an unmanned target in the U.S. Air Force.
Phantom production ran from 1958 to 1981, with a total of 5,195 built. This extensive run makes it the second most-produced Western jet fighter, behind the F-86 Sabre at just under 10,000 examples.