|
Atlantic Southeast Airlines Flight 7529
Atlantic Southeast Airlines Flight 529 was an Embraer EMB 120 Brasilia aircraft that crashed near Carrollton, Georgia, on August 21, 1995. Nine of the 29 passengers and crew on board were killed as a result of the accident. The accident bore similarities to Atlantic Southeast Airlines Flight 2311, which had occurred four years earlier, and resulted in the deaths of all 23 people on board. The inquiries of both crashes concluded that design flaws in the aircraft's propellers were to blame. Aircraft and flight information Flight 529 was a regularly scheduled passenger flight from Hartsfield-Jackson Atlanta International Airport to Gulfport-Biloxi International Airport in Gulfport, Mississippi. On August 21, 1995, the flight was operated using an Embraer EMB 120RT Brasilia (registration number N256AS), a twin-turboprop commuter airliner. The aircraft made its first flight in 1989 and was delivered to Atlantic Southeast Airlines on March 3 of that same year. Before the fatal f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fatigue (material)
In materials science, fatigue is the initiation and propagation of cracks in a material due to cyclic loading. Once a fatigue crack has initiated, it grows a small amount with each loading cycle, typically producing striations on some parts of the fracture surface. The crack will continue to grow until it reaches a critical size, which occurs when the stress intensity factor of the crack exceeds the fracture toughness of the material, producing rapid propagation and typically complete fracture of the structure. Fatigue has traditionally been associated with the failure of metal components which led to the term metal fatigue. In the nineteenth century, the sudden failing of metal railway axles was thought to be caused by the metal ''crystallising'' because of the brittle appearance of the fracture surface, but this has since been disproved. Most materials, such as composites, plastics and ceramics, seem to experience some sort of fatigue-related failure. To aid in predicting t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlanta Journal-Constitution
''The Atlanta Journal-Constitution'' is the only major daily newspaper in the metropolitan area of Atlanta, Georgia. It is the flagship publication of Cox Enterprises. The ''Atlanta Journal-Constitution'' is the result of the merger between ''The Atlanta Journal'' and ''The Atlanta Constitution''. The two staffs were combined in 1982. Separate publication of the morning ''Constitution'' and the afternoon ''Journal'' ended in 2001 in favor of a single morning paper under the ''Journal-Constitution'' name. The ''Atlanta Journal-Constitution'' has its headquarters in the Atlanta suburb of Dunwoody, Georgia. It was formerly co-owned with television flagship WSB-TV and six radio stations, which are located separately in midtown Atlanta; the newspaper remained part of Cox Enterprises, while WSB became part of an independent Cox Media Group. ''The Atlanta Journal'' ''The Atlanta Journal'' was established in 1883. Founder E. F. Hoge sold the paper to Atlanta lawyer Hoke Smith in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Survivor Guilt
Survivor guilt (or survivor's guilt; also called survivor syndrome or survivor's syndrome and survivor disorder or survivor's disorder) is a mental condition that occurs when a person believes they have done something wrong by surviving a traumatic or tragic event when others could not. The experience and manifestation of survivor's guilt will depend on an individual's psychological profile. When the ''Diagnostic and Statistical Manual of Mental Disorders IV'' (DSM-IV) was published, survivor guilt was removed as a recognized specific diagnosis, and redefined as a significant symptom of post-traumatic stress disorder (PTSD). History Survivor guilt was first identified during the 1960s. Several therapists recognized similar if not identical conditions among Holocaust survivors. Similar signs and symptoms have been recognized in survivors of traumatic situations including combat, natural disasters, terrorist attacks, air-crashes and wide-ranging job layoffs. A variant form has been ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Houston Chronicle
The ''Houston Chronicle'' is the largest daily newspaper in Houston, Texas, United States. , it is the third-largest newspaper by Sunday circulation in the United States, behind only ''The New York Times'' and the ''Los Angeles Times''. With its 1995 buy-out of long-time rival the ''Houston Post'', the ''Chronicle'' became Houston's newspaper of record. The ''Houston Chronicle'' is the largest daily paper owned and operated by the Hearst Corporation, a privately held multinational corporate media conglomerate with $10 billion in revenues. The paper employs nearly 2,000 people, including approximately 300 journalists, editors, and photographers. The ''Chronicle'' has bureaus in Washington, D.C. and Austin. It reports that its web site averages 125 million page views per month. The publication serves as the " newspaper of record" of the Houston area. Previously headquartered in the Houston Chronicle Building at 801 Texas Avenue, Downtown Houston, the ''Houston Chronicle'' i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loudoun County Sheriff's Office
The Loudoun County Sheriff's Office (LCSO) is the primary law enforcement agency within Loudoun County, Virginia and is the largest Sheriff's Office in the Commonwealth of Virginia. The agency is currently headed by Sheriff Michael L. Chapman who was last re-elected in 2019. Potential Transition to Police Department Shortly after being re-elected in 2019, Loudoun County Board of Supervisors Chairwoman Phyllis Randall proposed transitioning policing to a new police department while the sheriff would only be responsible for court related duties as is done in Prince William County and Fairfax County. Randall said the reason she proposed this is "I just simply don’t believe that law enforcement should be political." However, Sheriff Michael L. Chapman has stated that " oudoun Residentsare happy with the service they are getting, and it’s almost like, 'Why is there going to be a move to try and fix something that’s not broken?' it just seems to me to be a matter of just e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire
Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction Product (chemistry), products. At a certain point in the combustion reaction, called the ignition point, flames are produced. The ''flame'' is the visible portion of the fire. Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce Plasma (physics), plasma. Depending on the substances alight, and any impurities outside, the color of the flame and the fire's Intensity (heat transfer), intensity will be different. Fire in its most common form can result in conflagration, which has the potential to cause physical damage through burning. Fire is an important process that affects ecological systems around the globe. The positive effects of fire include stimulating growth and maintaining various ecological systems. Its negative effects include hazard to life and pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Georgia Regional Airport
West Georgia Regional Airport , also known as O. V. Gray Field, is a public use airport located five nautical miles (9 kilometre, km) northwest of the central business district of Carrollton, Georgia, Carrollton, in Carroll County, Georgia, Carroll County, Georgia (U.S. state), Georgia, United States. It is owned by the West Georgia Airport Authority. Although most U.S. airports use the same three-letter location identifier for the Federal Aviation Administration, FAA and International Air Transport Association, IATA, this airport is assigned CTJ by the FAA but has no designation from the IATA. Facilities and aircraft The airport covers an area of at an elevation of 1,161 feet (354 m) above mean sea level. It has one Asphalt concrete, asphalt paved runway designated 17/35 which measures 5,503 by 100 feet (1,677 x 30 m). For the 12-month period ending April 30, 2008, the airport had 24,500 aircraft operations, an average of 67 per day: 98% general aviation and 2% military avia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Aviation Administration
The Federal Aviation Administration (FAA) is the largest transportation agency of the U.S. government and regulates all aspects of civil aviation in the country as well as over surrounding international waters. Its powers include air traffic management, certification of personnel and aircraft, setting standards for airports, and protection of U.S. assets during the launch or re-entry of commercial space vehicles. Powers over neighboring international waters were delegated to the FAA by authority of the International Civil Aviation Organization. Created in , the FAA replaced the former Civil Aeronautics Administration (CAA) and later became an agency within the U.S. Department of Transportation. Major functions The FAA's roles include: *Regulating U.S. commercial space transportation *Regulating air navigation facilities' geometric and flight inspection standards *Encouraging and developing civil aeronautics, including new aviation technology *Issuing, suspending, or revoking ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lift (force)
A fluid flowing around an object exerts a force on it. Lift is the component of this force that is perpendicular to the oncoming flow direction. It contrasts with the drag force, which is the component of the force parallel to the flow direction. Lift conventionally acts in an upward direction in order to counter the force of gravity, but it can act in any direction at right angles to the flow. If the surrounding fluid is air, the force is called an aerodynamic force. In water or any other liquid, it is called a hydrodynamic force. Dynamic lift is distinguished from other kinds of lift in fluids. Aerostatic lift or buoyancy, in which an internal fluid is lighter than the surrounding fluid, does not require movement and is used by balloons, blimps, dirigibles, boats, and submarines. Planing lift, in which only the lower portion of the body is immersed in a liquid flow, is used by motorboats, surfboards, windsurfers, sailboats, and water-skis. Overview A fluid flowing arou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drag (physics)
In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid. This can exist between two fluid layers (or surfaces) or between a fluid and a solid surface. Unlike other resistive forces, such as dry friction, which are nearly independent of velocity, the drag force depends on velocity. Drag force is proportional to the velocity for low-speed flow and the squared velocity for high speed flow, where the distinction between low and high speed is measured by the Reynolds number. Even though the ultimate cause of drag is viscous friction, turbulent drag is independent of viscosity. Drag forces always tend to decrease fluid velocity relative to the solid object in the fluid's path. Examples Examples of drag include the component of the net aerodynamic or hydrodynamic force acting opposite to the di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nacelle
A nacelle ( ) is a "streamlined body, sized according to what it contains", such as an engine, fuel, or equipment on an aircraft. When attached by a pylon entirely outside the airframe, it is sometimes called a pod, in which case it is attached with a pylon or strut and the engine is known as a podded engine. In some cases—for instance in the typical "Farman" type "pusher" aircraft, or the World War II-era P-38 Lightning—an aircraft cockpit may also be housed in a nacelle, rather than in a conventional fuselage. Etymology Like many aviation terms, the word comes from French, in this case from a word for a small boat. Development The development of the Arado Ar 234, merging the four nacelles into two The Arado Ar 234 was one of the first operational jet aircraft with engines mounted in nacelles. During its development, the four jet engines were merged from having four distinct nacelles, all of which contained their own landing gear wheel, to two nacelles with two engi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller (aircraft)
An aircraft propeller, also called an airscrew,Beaumont, R.A.; ''Aeronautical Engineering'', Odhams, 1942, Chapter 13, "Airscrews". converts rotary motion from an engine or other power source into a swirling slipstream which pushes the propeller forwards or backwards. It comprises a rotating power-driven hub, to which are attached several radial airfoil-section blades such that the whole assembly rotates about a longitudinal axis. The blade pitch may be fixed, manually variable to a few set positions, or of the automatically variable "constant-speed" type. The propeller attaches to the power source's driveshaft either directly or through reduction gearing. Propellers can be made from wood, metal or composite materials. Propellers are most suitable for use at subsonic airspeeds generally below about , although supersonic speeds were achieved in the McDonnell XF-88B experimental propeller-equipped aircraft. Supersonic tip-speeds are used in some aircraft like the Tupolev Tu-95, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.svg "Click for more on -> Atlanta Journal-Constitution")
