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TWA Flight 841 (1979)
TWA Flight 841 was a scheduled passenger flight from John F. Kennedy International Airport, New York City, en route to Minneapolis-Saint Paul International Airport in Minneapolis, Minnesota. On the evening of April 4, 1979, while flying over Saginaw, Michigan, the Boeing 727-31 airliner began a sharp, uncommanded roll to the right, and subsequently went into a spiral dive. The pilots were able to regain control of the aircraft and made an emergency landing at Detroit Metropolitan Airport. Background Aircraft The aircraft involved, manufactured in 1965, was a 14-year-old Boeing 727-31, registered as N840TW with serial number 18905. In its 14 years of service, it had accumulated about 35,412 hours and it was equipped with three Pratt & Whitney JT8D-7B engines. Crew In command was Captain Harvey G. "Hoot" Gibson, aged 44, who had logged a total of 15,710 piloting hours, 2,597 of them on the 727. The day before he had returned to flying following a three month medical lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saginaw, Michigan
Saginaw () is a city in Saginaw County, Michigan, United States, and its county seat. It had a population of 44,202 at the 2020 United States census, 2020 census. Located along the Saginaw River, Saginaw is adjacent to Saginaw Charter Township, Michigan, Saginaw Charter Township and considered part of Saginaw, Midland, and Bay City metropolitan area, Greater Tri-Cities region of Central Michigan. The Saginaw Metropolitan statistical area, metropolitan area had a population of 190,124 in 2020, while the Tri-Cities area had 377,474 residents. Established as a fort following the 1819 Treaty of Saginaw, Saginaw was a thriving lumber town in the 19th century. It was an important industrial city and manufacturing center throughout much of the 20th century due to its Automotive industry in the United States, automobile and automotive parts production led by General Motors. As part of the Rust Belt, its industry and strong manufacturing presence declined, leading to increased unemployme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Line Pilots Association, International
The Air Line Pilots Association, International (ALPA) is the largest pilot union in the world, representing more than 79,000 pilots from 42 US and Canadian airlines. ALPA was founded on 27 July 1931 and is a member of the AFL-CIO and the Canadian Labour Congress. Known internationally as US-ALPA, ALPA is also a member of the IFALPA. The association has been a staunch proponent of the "1,500-hour rule", which requires pilots for commercial airlines to log 1,500 hours of flying before they can obtain their license, which is vastly higher than the rules in other countries and has substantially increased the costs and time for prospective pilots to obtain certification. History ALPA was founded by David L. Behncke and 23 other key figures in Chicago, Illinois, on July 27, 1931. In the 1930s, flying was a perilous occupation; thus, from the time of its formation, one of ALPA's main goals was to improve air safety. In 1933, the decision by the National Labor Board to limit the flig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chicago Tribune
The ''Chicago Tribune'' is an American daily newspaper based in Chicago, Illinois, United States. Founded in 1847, it was formerly self-styled as the "World's Greatest Newspaper", a slogan from which its once integrated WGN (AM), WGN radio and WGN-TV, WGN television received their call letters. It is the most-read daily newspaper in the Chicago metropolitan area and the Great Lakes region, and the List of newspapers in the United States, sixth-largest newspaper by print circulation in the United States. In the 1850s, under Joseph Medill, the ''Chicago Tribune'' became closely associated with the Illinois politician Abraham Lincoln, and the then new Republican Party (United States), Republican Party's progressive wing. In the 20th century, under Medill's grandson 'Colonel' Robert R. McCormick, its reputation was that of a crusading newspaper with an outlook that promoted Conservatism in the United States, American conservatism and opposed the New Deal. Its reporting and commenta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boeing
The Boeing Company, or simply Boeing (), is an American multinational corporation that designs, manufactures, and sells airplanes, rotorcraft, rockets, satellites, and missiles worldwide. The company also provides leasing and product support services. Boeing is among the largest global aerospace manufacturers; it is the fourth-largest defense contractor in the world based on 2022 revenue and is the largest exporter in the United States by dollar value. Boeing was founded by William E. Boeing in Seattle, Washington, on July 15, 1916. The present corporation is the result of the merger of Boeing with McDonnell Douglas on August 1, 1997. As of 2023, the Boeing Company's corporate headquarters is located in the Crystal City neighborhood of Arlington County, Virginia. The company is organized into three primary divisions: Boeing Commercial Airplanes (BCA), Boeing Defense, Space & Security (BDS), and Boeing Global Services (BGS). In 2021, Boeing recorded $62.3billion in sales. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leading-edge Slats
A slat is an aerodynamic surface on the leading edge of the wing of a fixed-wing aircraft. When retracted, the slat lies flush with the rest of the wing. A slat is deployed by sliding forward, opening a slot between the wing and the slat. Air from below the slat flows through the slot and replaces the boundary layer that has travelled at high speed around the leading edge of the slat, losing a significant amount of its kinetic energy due to skin friction drag. When deployed, slats allow the wings to operate at a higher angle of attack before stalling. With slats deployed an aircraft can fly at slower speeds, allowing it to take off and land in shorter distances. They are used during takeoff and landing and while performing low-speed maneuvers which may take the aircraft close to a stall. Slats are retracted in normal flight to minimize drag. Slats are high-lift devices typically used on aircraft intended to operate within a wide range of speeds. Trailing-edge flap systems run ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airstair
An airstair is a set of steps built into an aircraft so that passengers may board and alight the aircraft. The stairs are often built into a clamshell-style door on the aircraft. Airstairs eliminate the need for passengers to use a Ground support equipment#Passenger boarding steps/stairs, mobile stairway or jetway to board or exit the aircraft, providing more independence from Aircraft ground handling, ground services. Some of the earliest aircraft to feature airstairs were the Martin 2-0-2 and Martin 4-0-4. Some models of the Douglas DC-3 were also retrofitted with airstairs (see picture). As airport infrastructure has developed, the need for airstairs has decreased, as jetways or mobile stairways are often available. Wide-body aircraft rarely employ airstairs, as the doors are significantly higher above the ground than narrow-body aircraft. One notable exception is the Lockheed L-1011, the only wide-body aircraft to feature full-height airstairs. The only other wide-bodies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auxiliary Power Unit
An auxiliary power unit (APU) is a device on a vehicle that provides energy for functions other than propulsion. They are commonly found on large aircraft and naval ships as well as some large land vehicles. Aircraft APUs generally produce 115 V AC voltage at 400 Hz (rather than 50/60 Hz in mains supply), to run the electrical systems of the aircraft; others can produce 28 V DC voltage. APUs can provide power through single or three-phase systems. A jet fuel starter (JFS) is a similar device to an APU but directly linked to the main engine and started by an onboard compressed air bottle. Transport aircraft History During World War I, the British Coastal class blimps, one of several types of airship operated by the Royal Navy, carried a ABC auxiliary engine. These powered a generator for the craft's radio transmitter and, in an emergency, could power an auxiliary air blower. One of the first military fixed-wing aircraft to use an APU was the British, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yaw Damper
A yaw damper (sometimes referred to as a stability augmentation system) is a system used to reduce (or damp) the undesirable tendencies of an aircraft to oscillate in a repetitive rolling and yawing motion, a phenomenon known as the Dutch roll. A large number of modern aircraft, both jet-powered and propeller-driven, have been furnished with such systems. The use of a yaw damper provides superior ride quality by automatically preventing uncomfortable yawing and rolling oscillations and reduces pilot workload. On some aircraft, it is mandatory for the yaw damper to be operational at all times during flight above a specified altitude; several airliners were deemed to be unsafe to fly without an active yaw damper. Design The yaw damper system consists of accelerometers and sensors that monitor the aircraft rate of yaw; these are electronically connected to a flight computer that processes the signals and automatically controls actuators connected to the rudder. In effect, these ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leading-edge Slat
A slat is an aerodynamic surface on the leading edge of the wing of a fixed-wing aircraft. When retracted, the slat lies flush with the rest of the wing. A slat is deployed by sliding forward, opening a slot between the wing and the slat. Air from below the slat flows through the slot and replaces the boundary layer that has travelled at high speed around the leading edge of the slat, losing a significant amount of its kinetic energy In physics, the kinetic energy of an object is the form of energy that it possesses due to its motion. In classical mechanics, the kinetic energy of a non-rotating object of mass ''m'' traveling at a speed ''v'' is \fracmv^2.Resnick, Rober ... due to skin friction drag. When deployed, slats allow the wings to operate at a higher angle of attack before stall (flight), stalling. With slats deployed an aircraft can fly at slower speeds, allowing it to take off and land in shorter distances. They are used during takeoff and landing and while perfor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of the longest-running newspapers in the United States, the ''Times'' serves as one of the country's Newspaper of record, newspapers of record. , ''The New York Times'' had 9.13 million total and 8.83 million online subscribers, both by significant margins the List of newspapers in the United States, highest numbers for any newspaper in the United States; the total also included 296,330 print subscribers, making the ''Times'' the second-largest newspaper by print circulation in the United States, following ''The Wall Street Journal'', also based in New York City. ''The New York Times'' is published by the New York Times Company; since 1896, the company has been chaired by the Ochs-Sulzberger family, whose current chairman and the paper's publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landing Gear
Landing gear is the undercarriage of an aircraft or spacecraft that is used for taxiing, takeoff or landing. For aircraft, it is generally needed for all three of these. It was also formerly called ''alighting gear'' by some manufacturers, such as the Glenn L. Martin Company. For aircraft, Stinton makes the terminology distinction ''undercarriage (British) = landing gear (US)''. For aircraft, the landing gear supports the craft when it is not flying, allowing it to take off, land, and taxi without damage. Wheeled landing gear is the most common, with skis or Seaplane, floats needed to operate from snow/ice/water and skids for vertical operation on land. Retractable undercarriages fold away during flight, which reduces drag (physics), drag, allowing for faster airspeeds. Landing gear must be strong enough to support the aircraft and its design affects the weight, balance and performance. It often comprises three wheels, or wheel-sets, giving a tripod effect. Some unusual land ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
