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Northwest Airlines Flight 6231
Northwest Orient Airlines Flight 6231 was the fatal crash of a Boeing 727 in the eastern United States on December 1, 1974 in Harriman State Park near Stony Point, New York, just north of the New York City area. The Northwest Airlines 727 had been chartered to pick up the Baltimore Colts professional football team in Buffalo in western New York. All three crew members on board died when the aircraft struck the ground following a stall and rapid descent caused by the crew's reaction to erroneous airspeed readings caused by atmospheric icing. The icing occurred due to failure to turn on the pitot tube heating at the start of the flight. This was one of two Boeing 727s to crash in the eastern U.S. that day; the other was TWA Flight 514 in northern Virginia, northwest of Dulles airport ( to the southwest). Aircraft The Boeing 727-251, registration N274US, was certificated and maintained in accordance with FAA regulations and requirements at the time of the crash. Copy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stall (fluid Dynamics)
In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack exceeds its critical value.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', p. 486. Aviation Supplies & Academics, 1997. The critical angle of attack is typically about 15°, but it may vary significantly depending on the fluid, foil – including its shape, size, and finish – and Reynolds number. Stalls in fixed-wing aircraft are often experienced as a sudden reduction in lift. It may be caused either by the pilot increasing the wing's angle of attack or by a decrease in the critical angle of attack. The former may be due to slowing down (below stall speed), the latter by accretion of ice on the wings (especially if the ice is rough). A stall does not mean that the engine(s) have stopped working, or that the aircraft has stopped moving—the effect is the same even in an unpowered glider aircraft. Vectored thrust in aircraft is used to maintain al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atmospheric Icing
Atmospheric icing occurs in the atmosphere when water droplets suspended in air freeze on objects they come in contact with. It is not the same as freezing rain, which is caused directly by precipitation. Atmospheric icing occurs on aircraft, towers, wind turbines, boats, oil rigs, and trees. Unmanned aircraft are particularly sensitive to icing. In cold climates, particularly those at higher elevations, atmospheric icing is common in winter as elevated terrain interacts with supercooled clouds that can cause icing on contact. Ice loads are a major cause of catastrophic failures of overhead electrical power lines, as power lines can break under the weight of accumulated ice. Therefore, estimation of maximum potential ice load is crucial in the structural design of power line systems to withstand ice loads, and this can be done with numerical icing models and examples that include meteorological data. Formation Water does not always freeze at . Water that persists in liqui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coordinated Universal Time
Coordinated Universal Time (UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce. UTC has been widely embraced by most countries and is the effective successor to Greenwich Mean Time (GMT) in everyday usage and common applications. In specialised domains such as scientific research, navigation, and timekeeping, other standards such as Universal Time, UT1 and International Atomic Time (TAI) are also used alongside UTC. UTC is based on TAI (International Atomic Time, abbreviated from its French name, ''temps atomique international''), which is a weighted average of hundreds of atomic clocks worldwide. UTC is within about one second of mean solar time at 0° longitude, the currently used prime meridian, and is not adjusted for daylight saving time. The coordination of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Standard Time
The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States, parts of eastern Canada, and the state of Quintana Roo in Mexico. * Eastern Standard Time (EST) is five hours behind Coordinated Universal Time ( UTC−05:00). Observed during standard time (late autumn/winter in the United States and Canada). * Eastern Daylight Time (EDT) is four hours behind Coordinated Universal Time ( UTC−04:00). Observed during daylight saving time (spring/summer/early autumn in the United States and Canada). On the second Sunday in March, at 2:00 a.m. EST, clocks are advanced to 3:00 a.m. EDT, creating a 23-hour day. On the first Sunday in November, at 2:00 a.m. EDT, clocks are moved back to 1:00 a.m. EST, which results in a 25-hour day. History The boundaries of the Eastern Time Zone have moved westward since the Interstate Commerce Commission (ICC) took over time-zone management from railroads in 1938. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jet A Fuel
Jet fuel or aviation turbine fuel (ATF, also abbreviated avtur) is a type of aviation fuel designed for use in aircraft powered by Gas turbine, gas-turbine engines. It is colorless to straw-colored in appearance. The most commonly used fuels for commercial aviation are Jet A and Jet A-1, which are produced to a standardized international specification. The only other jet fuel commonly used in civilian turbine-engine powered aviation is Jet B, which is used for its enhanced cold-weather performance. Jet fuel is a mixture of a variety of hydrocarbons. Because the exact composition of jet fuel varies widely based on petroleum source, it is impossible to define jet fuel as a ratio of specific hydrocarbons. Jet fuel is therefore defined as a performance specification rather than a chemical compound. Furthermore, the range of molecular mass between hydrocarbons (or different carbon numbers) is defined by the requirements for the product, such as the freezing point or smoke point. Keros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thanksgiving (United States)
Thanksgiving is a Federal holidays in the United States, federal holiday in the United States celebrated on the fourth Thursday of November (which became the uniform date country-wide in 1941). Outside the United States, it is sometimes called American Thanksgiving to distinguish it from Thanksgiving (Canada), the Canadian holiday of the same name and Thanksgiving, related celebrations in other regions. The modern national celebration dates to 1863 and has been linked to the Pilgrim Fathers, Pilgrims' 1621 harvest festival since the late 19th century. As the name implies, the theme of the holiday generally revolves around giving thanks and the centerpiece of most celebrations is a Thanksgiving dinner with family Friendsgiving, and friends. The dinner often consists of foods associated with New England harvest celebrations: Turkey meat, turkey, potatoes (usually Mashed potato, mashed and Sweet potato, sweet), Winter squash, squash, maize, corn (maize), green beans, Cranberry, cra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detroit Metropolitan Airport
Detroit Metropolitan Wayne County Airport is the primary international airport serving Detroit and its Metro Detroit, surrounding metropolitan area, in the U.S. state of Michigan. It is located in Romulus, Michigan, Romulus, a Detroit suburb. It is by far Michigan's busiest airport, with ten times as many enplanements and deplanements as the next-busiest, Gerald R. Ford International Airport in Grand Rapids and more than all other airports in the state combined. The Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021 FAA airport categories, categorized it as a large hub primary commercial service facility. effective May 15, 2025. The airport covers of land. The airport is a major and second largest hub for Delta Air Lines and is also a base for Spirit Airlines. The airport has service to 30 international destinations and service to 39 states across the United States. Operated by the Wayne County Airport Authority, the airport ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embry–Riddle Aeronautical University
Embry-Riddle Aeronautical University (ERAU) is a private university focused on aviation and aerospace programs based in Daytona Beach, Florida, and Prescott, Arizona, United States. It is the largest accredited university system specializing in aviation and aerospace. It has numerous online programs and academic programs offered at satellite locations. Founded at Cincinnati Municipal Lunken Airport, Lunken Field in Cincinnati in 1926, it began as a regional school for pilots and aircraft mechanics. With the expansion and development of aviation and related space programs, the university enrolls almost 31,000 undergraduate and graduate students. History On December 17, 1925, Talton Higbee Embry and John Paul Riddle founded the Embry–Riddle Company at Lunken Airport in Cincinnati, Ohio. In spring 1926, the company opened the Embry–Riddle School of Aviation. Following a merger with the Avco, Aviation Corporation (AVCO), the Embry–Riddle flying school was closed in 1930. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Transportation Safety Board
The National Transportation Safety Board (NTSB) is an independent U.S. government investigative agency responsible for civil transportation accident investigation. In this role, the NTSB investigates and reports on aviation accidents and incidents, certain types of highway crashes, ship and marine accidents, pipeline incidents, bridge failures, and railroad accidents. The NTSB is also in charge of investigating cases of hazardous materials releases that occur during transportation. The agency is based in Washington, D.C. It has three regional offices, located in Anchorage, Alaska; Aurora, Colorado; and Federal Way, Washington. The agency also operated a national training center at its Ashburn facility. History The origin of the NTSB was in the Air Commerce Act of 1926, which assigned the United States Department of Commerce responsibility for investigating domestic aviation accidents. Before the NTSB, the Federal Aviation Administration's (FAA; at the time the CAA/ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Aviation Administration
The Federal Aviation Administration (FAA) is a Federal government of the United States, U.S. federal government agency within the United States Department of Transportation, U.S. Department of Transportation that regulates civil aviation in the United States and surrounding international waters. Its powers include air traffic control, 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. The FAA was created in as the Federal Aviation Agency, replacing the Civil Aeronautics Administration (United States), Civil Aeronautics Administration (CAA). In 1967, the FAA became part of the newly formed U.S. Department of Transportation and was renamed the Federal Aviation Administration. Major functions The FAA's roles include: *Regulating U.S. co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraft Registration
An aircraft registration is a code unique to a single aircraft, required by international convention to be marked on the exterior of every civil aircraft. The registration indicates the aircraft's country of registration, and functions much like an automobile license plate or a ship registration. This code must also appear in its Certificate of Registration, issued by the relevant civil aviation authority (CAA). An aircraft can only have one registration, in one jurisdiction, though it is changeable over the life of the aircraft. Legal provisions In accordance with the Convention on International Civil Aviation (also known as the Chicago Convention), all civil aircraft must be registered with a civil aviation authority (CAA) using procedures set by each country. Every country, even those not party to the Chicago Convention, has an NAA whose functions include the registration of civil aircraft. An aircraft can only be registered once, in one jurisdiction, at a time. The NAA a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Washington Dulles International Airport
Washington Dulles International Airport ( ) – commonly known by its former name of Dulles International Airport, by its airport code of IAD, or simply as Dulles Airport – is an international airport in the Eastern United States, located west of downtown Washington, D.C., in Loudoun and Fairfax counties in Northern Virginia. Opened in 1962, the airport is named after John Foster Dulles, an influential secretary of state during the Cold War who briefly represented New York in the United States Senate. Its main terminal was designed by Eero Saarinen, who also designed the TWA Flight Center at John F. Kennedy International Airport. Operated by the Metropolitan Washington Airports Authority, Dulles occupies , Effective May 15, 2025. straddling the Loudoun–Fairfax IAD ranks fourth in the US in terms of land area, after Denver International Airport, Dallas/Fort Worth International Airport, and Southwest Florida International Airport. Most of the airport is in the uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
