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Aviation Portal

Aviation encompasses all the activities relating to airborne devices created by human ingenuity, generally known as aircraft. These activities include the organizations and regulatory bodies as well as the personnel related with the operation of aircraft and the industries involved in airplane manufacture, development, and design.

Contents1 bright medical History2 Civil aviation2.1 Air transport2.2 vanderbilt medical center General aviation3 Military aviation3.1 Types of military aircraft4 Air Traffic Control (ATC)5 Environmental impact6 Notes7 See also
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History

Main article: Aviation history
Many cultures have built devices that travel through the air, from the earliest no medical insurance projectiles such as stones and spears, to more Medical Fetish Blog sophisticated buoyant or aerodynamic devices such as the mechanical pigeon of Archytas in ancient Greece, the boomerang in Australia, the Medical Journal Of Australia hot air Kongming lantern, and kites. There are early legends of human flight such as the story of Icarus, and later, more credible claims of short-distance human flights including a kite flight by Yuan Huangtou in China, and the parachute flight and controlled glider flight of Abbas Ibn Firnas (Armen Firman).

First flight by the Wright Brothers, December 17, 1903

The modern age of aviation began with the first untethered human lighter-than-air flight on November 21, 1783, in a hot air balloon designed by the Montgolfier brothers.

The practicality of balloons was limited because they could only medical advise travel downwind. It was immediately recognized that a steerable, or dirigible, balloon was required. Jean-Pierre Blanchard flew the first human-powered dirigible in 1784 and crossed the English Channel in one in 1785. Subsequent early dirigible developments included machine-powered propulsion (Henri Giffard, 1852), rigid frames (David Schwarz, 1896), and improved speed and maneuverability (Alberto Santos-Dumont, 1901).

Hindenburg at Lakehurst Naval Air Station, 1936

While medical video of male genitalia exams there are many competing claims for the earliest powered, heavier-than-air va medical benefits flight, the most widely-accepted date is December 17, 1903 by the Wright brothers, though their aircraft was impractical to fly for more than a short distance because of control problems. The widespread adoption of ailerons made aircraft much easier to manage, and only a decade later, at the start of World War I, heavier-than-air powered aircraft had become practical for reconnaissance, artillery spotting, and even attacks against ground positions.

Aircraft began to transport people and cargo as designs grew larger and more reliable. In contrast to small non-rigid blimps, giant rigid airships became the first aircraft to transport passengers and cargo over great distances. The best known aircraft of this type were manufactured by the German Zeppelin company.

The most successful Zeppelin was the Graf Zeppelin. It flew over one million miles, including an around-the-world flight in August of 1929. However, the dominance of the Zeppelins over the airplanes of the that period, which had a range of only a few medical device equipment hundred miles, was diminishing as airplane design advanced. The "Golden Age" of the airships ended on June 6, 1937 when the Hindenburg caught fire national naval medical center killing 36 people. Although there have been periodic initiatives to revive their use, airships have seen only niche application since that time.

Great progress was made in the field of aviation during the 1920s and 1930s, such as Charles Lindbergh's family medical leave act transatlantic crozer chester medical center flight in 1927. One of the most successful designs of this period was the Douglas DC-3 which became the first airliner that was profitable carrying passengers exclusively, starting the modern era of passenger airline service. By the lowakey medical center in florida beginning of World War

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II, many towns and cities had built airports, and there were numerous qualified pilots available. The war brought many innovations to aviation, including the first jet aircraft and the first liquid-fueled rockets.

NASA's Helios researches solar powered flight.

After WWII, especially in North America, there was a boom in general aviation, both private and commercial, as

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thousands of pilots were released from medical assisting continuing education military online medical service and many inexpensive Gensys Medical war-surplus transport and training aircraft became available. Manufacturers such as Cessna, medical director mercy san juan Piper, and Beechcraft expanded production to provide light aircraft for the new middle class market.

By the 1950s, the development of civil jets grew, beginning with the de Havilland Comet, though the first widely-used passenger jet was the Boeing 707, because hippa medical records it was much more economical than other planes at the time. liberty medical At the same time, turboprop propulsion began to appear for smaller commuter planes, making it possible to serve small-volume routes in a much wider range of weather conditions.

Yuri Gagarin was the first human to travel to space on April 12, 1961, while Neil Armstrong was the first to set foot on the moon on July 21, 1969.

Since the 1960s, composite airframes and quieter, more efficient engines have become available, but the most important innovations have taken place in instrumentation and control. The arrival of solid-state electronics, the Global Positioning System, satellite communications, and increasingly small and powerful computers and LED displays, have dramatically changed the cockpits of airliners and, increasingly, of smaller aircraft as well. Pilots can navigate much more accurately and view terrain, obstructions, and other nearby aircraft on a map or Genesys Medical through synthetic vision, even at night or in low visibility.

On June 21, 2004, SpaceShipOne became the first privately funded aircraft to make a spaceflight, opening the possibility of an aviation market outside the earth's atmosphere. Meanwhile, flying prototypes of aircraft powered by alternative fuels, such as ethanol, electricity, and even solar energy, are becoming more common and may soon enter the mainstream, at least for light aircraft.



Civil aviation

Main article: Civil aviation
Civil aviation includes all non-military flying, both general aviation and scheduled air transport.



Air transport

Main article: Airline
Swiss International Air Lines Airbus A330

There are five major manufacturers medical information id usb drive of civil transport aircraft:

Airbus, based in EuropeBoeing, based in the United StatesBombardier, based in CanadaEmbraer, based valley medical center in BrazilTupolev, based in Russia (scheduled to be merged into medical coding workbooks the United Aircraft Building Corporation)
Boeing, Airbus, and Tupolev concentrate on abc medical dallas texas wide-body and narrow-body jet airliners, while Bombardier and Embraer concentrate on regional airliners. Large networks of specialized parts suppliers from around the world support these manufacturers, who sometimes provide only the initial design and final assembly in their own plants. The Chinese ACAC consortium Burnett Medical Center will also soon enter the civil transport market with its ACAC ARJ21 regional jet.

Until the 1970s, most major airlines were flag carriers, sponsored by their governments and heavily protected from competition. Since then, open skies agreements have resulted in ut medical group memphis increased competition and choice for consumers, coupled with falling prices for airlines. The combination power medical interventions of high fuel prices, low fares, high salaries, and crises such as the September 11, 2001 attacks and the SARS epidemic have driven medical fantasy role play give birth many older airlines to government-bailouts, bankruptcy or medical alert dog tags mergers. At the same time, low-cost carriers such as Ryanair and Southwest have flourished.



General aviation

Main article: General aviation
A weight-shift ultralight aircraft, the Air Creation nonwoven medical Tanarg

General aviation includes all non-scheduled civil flying, medical legal illustrators both private and commercial. General aviation may include business flights, air charter, maryland medical license private aviation, flight training, ballooning, parachuting, gliding, hang gliding, aerial photography, foot-launched powered hang gliders, air wilkes medical center wilkesboro nc ambulance, crop dusting, charter flights, traffic reporting, police air patrols and forest fire fighting.

Each country regulates aviation differently, but general aviation usually falls under different regulations depending on whether it is private or commercial and on the type of equipment involved.

Many small aircraft manufacturers, pace medical for the elderly including Cessna, Piper, Diamond, Mooney, Cirrus Design, Raytheon, and others serve the list of medical careers general aviation market, with a focus on private aviation and flight training.

The most important recent developments for small aircraft (which form the bulk of the GA medical alert system fleet) have been the introduction of advanced avionics (including GPS) that were formerly found only in large airliners, and the introduction of composite materials to make small aircraft lighter and faster. Ultralight and homebuilt aircraft have also become increasingly popular for recreational use, since in most countries that allow private aviation, they are much less expensive and less heavily regulated than certified aircraft.



Military aviation

Main article: Aerial warfare
Simple balloons were used as surveillance aircraft as early as the 18th century. Over the years, military aircraft have been built to meet ever increasing capability requirements. Manufacturers of military aircraft compete for contracts to supply their government's arsenal. Aircraft are selected based on factors like renown medical center cost, performance, and the speed of dekalb medical center production.

The Lockheed SR-71 remains unsurpassed in many areas of performance.



Types of military aircraft

Fighter aircraft's primary function is to destroy other aircraft. (e.g. Sopwith Camel, A6M Zero, F-16, MiG-29, Su-27, F-22).Ground attack aircraft are used against tactical earth-bound targets. (e.g. Junkers Stuka diver bomber, Ilyushin Il-2 , Sukhoi Su-25, and the A-10).Bombers are generally used against more strategic targets. (e.g. Zeppelin, B-29 Superfortress, Tu-22, Dassault Mirage medical coding software IV, and the B-2 Spirit)Cargo transport aircraft are used to transport hardware and personel, such as the C-17 Globemaster III or C-130 Hercules.Surveillance aircraft are used for reconnaissance (e.g. Rumpler Taube, de Havilland Mosquito, U-2, and MiG-25R).Helicopters are used for assault support, cargo transport and close air support.


Air Traffic Control (ATC)

Main article: Air traffic control
Air traffic control towers at Schiphol Airport, the Netherlands

Air traffic control (ATC) involves communication with aircraft to help maintain separation ? that is, they ensure that aircraft medical device post market surviellance are sufficiently far enough apart tarrant county low cost medical care horizontally or vertically for no risk of collision. Controllers may medical coding courses co-ordinate position reports provided by pilots, or in high traffic areas (such as the United States) they may use RADAR to see aircraft positions.

There are generally four different types of ATC:

control towers (including tower, ground mac medical icons control, clearance delivery, and other services), which control aircraft within a small distance (typically 10-15 km horizontal, and 1,000 m vertical) of an airport.terminal controllers, who control Hendricks Medical Center aircraft in a wider area (typically 50-80 km) around busy airportscentre controllers, who control aircraft enroute between airportsoceanic controllers, who control medical pot aircraft over international waters between continents, generally without radar service
ATC is especially important for aircraft flying under Instrument flight rules (IFR), where they may be in weather conditions that do not allow the pilots to see other aircraft. However, in very high-traffic areas, especially near major airports, aircraft flying under Visual flight rules (VFR) are also required to follow instructions from ATC.

In addition to separation from other aircraft, ATC may provide weather advisories, terrain separation, navigation assistance, and other services to pilots, depending on their workload.

ATC does not control all flights. The majority of VFR flights in North America are not required to talk to ATC medical boards test physician assistant (unless they are passing through a busy terminal area or using a major airport), and medical school interview questions in many areas, such as northern medical school minnesota Canada, ATC services are not available even for IFR flights at lower altitudes.



Environmental impact

Main article: Aviation and the environment
Like all activities involving combustion, operating powered aircraft (from airliners to hot air balloons) releases greenhouse fred toney medical gases such as carbon dioxide (CO2), soot, and other pollutants into the atmosphere. In addition, there are environmental impacts specific to aviation:

Water vapour contrails medical aesthetics left by high-altitude jet airliners. These may contribute to cirrus cloud formation.

Aircraft operating at high altitudes near the tropopause (mainly large jet airliners) emit aerosols and leave contrails, both of which can increase cirrus cloud formation ? cloud cover may have increased by up to 0.2% since the birth of aviation.Aircraft operating at high altitudes near the tropopause can also release chemicals that interact with greenhouse gases at those altitudes, particularly nitrogen compounds, which interact with ozone, increasing ozone concentrations.Most light piston aircraft burn avgas, which contains tetra-ethyl lead (TEL), a highly-toxic substance that can cause soil contamination at airports. Some lower-compression piston engines can operate on unleaded mogas, and turbine engines and diesel engines ? neither of which requires lead ? are appearing on some newer light aircraft.


Notes

^ Babcock Gover, Philip (1990). Webster's Third New International Dictionary. Merriam-Webster. ISBN 978-0877792017.?^ Archytas of Tarentum, Technology Museum of Thessaloniki, Macedonia, Greece^ Automata history^ China's Aircraft Industry Gets Off the Ground - TIME^ Aviation and the Global Atmosphere (IPCC)^ Lin, X.; Trainer, M. and Liu, S.C., (1988). "On the nonlinearity of the tropospheric ozone production.". Journal of Geophysical Research 93: 15879?15888.?^ medical picture of brain Grewe, V.; D. Brunner, M. Dameris, J. L. Grenfell, R. Hein, irs medical deductions D. Shindell, J. Staehelin (July 2001). "Origin and variability of upper tropospheric nitrogen oxides and ozone at northern mid-latitudes". Atmospheric Environment 35 (20): 3421-3433. doi:10.1016/S1352-2310(01)00134-0. Retrieved on 2007-11-20.?


See also

Timeline of aviationList of aviation topicsAviation, aerospace, and aeronautical terms
At Wikiversity you can learn more about Aviation at:The School of Aviation

Look up aviation in Wiktionary, the free dictionary.

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