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General Electric GE9X
The General Electric GE9X is a high-bypass turbofan developed by GE Aviation exclusively for the Boeing 777X. It first ran on the ground in April 2016 and first flew on March 13, 2018; it powered the 777-9's maiden flight in early 2020. It received its Federal Aviation Administration (FAA) type certificate on September 25, 2020. Derived from the General Electric GE90 with a larger fan, advanced materials like ceramic matrix composites (CMCs), and higher bypass and compression ratios, it was designed to improve fuel efficiency by 10% compared to the GE90. It is rated at of thrust, which is 5,000 lbf (20 kN) less than the GE90 highest thrust variant, the GE90-115 rated at . Development In February 2012, GE announced studies on a more efficient derivative of the GE90, calling it the GE9X, to power both the -8/9 variants of the new Boeing 777X. It was to feature the same fan diameter as the GE90-115B with thrust decreased by to a new rating of per engine. The engine for the 77 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft
A WikiProject, or Wikiproject, is a Wikimedia movement affinity group for contributors with shared goals. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within sister projects such as Wiktionary, Wikiquote, Wikidata, and Wikisource. They also exist in different languages, and translation of articles is a form of their collaboration. During the COVID-19 pandemic, CBS News noted the role of Wikipedia's WikiProject Medicine in maintaining the accuracy of articles related to the disease. Another WikiProject that has drawn attention is WikiProject Women Scientists, which was profiled by '' Smithsonian'' for its efforts to improve coverage of women scientists which the profile noted had "helped increase the number of female scientists on Wikipedia from around 1,600 to over 5,000". On Wikipedia Some Wikipedia WikiProjects are substantial enough to engage in cooperative activities with outside organizations relevant to the field at issue. For e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Additive Manufacturing
3D printing or additive manufacturing is the construction of a three-dimensional object from a CAD model or a digital 3D model. It can be done in a variety of processes in which material is deposited, joined or solidified under computer control, with material being added together (such as plastics, liquids or powder grains being fused), typically layer by layer. In the 1980s, 3D printing techniques were considered suitable only for the production of functional or aesthetic prototypes, and a more appropriate term for it at the time was rapid prototyping. , the precision, repeatability, and material range of 3D printing have increased to the point that some 3D printing processes are considered viable as an industrial-production technology, whereby the term ''additive manufacturing'' can be used synonymously with ''3D printing''. One of the key advantages of 3D printing is the ability to produce very complex shapes or geometries that would be otherwise impossible to construct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crosswind
A crosswind is any wind that has a perpendicular component to the line or direction of travel. This affects the aerodynamics of many forms of transport. Moving non-parallel to the wind's direction creates a crosswind component on the object and thus increasing the apparent wind on the object; such use of cross wind travel is used to advantage by sailing craft, kiteboarding craft, power kiting, etc. On the other side, crosswind moves the path of vehicles sideways and can be a hazard. Definition When winds are not parallel to or directly with/against the line of travel, the wind is said to have a crosswind ''component''; that is, the force can be separated into two vector components: * the headwind or tailwind component in the direction of motion, * the crosswind component perpendicular to the former. A vehicle behaves as though it is directly experiencing a lateral effect of the magnitude of the crosswind component only. The crosswind component is computed by multiplying the win ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exhaust Gas Temperature
Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline (petrol), diesel fuel, fuel oil, biodiesel blends, or coal. According to the type of engine, it is discharged into the atmosphere through an exhaust pipe, flue gas stack, or propelling nozzle. It often disperses downwind in a pattern called an ''exhaust plume''. It is a major component of motor vehicle emissions (and from stationary internal combustion engines), which can also include crankcase blow-by and evaporation of unused gasoline. Motor vehicle emissions contribute to air pollution and are a major ingredient in the creation of smog in some large cities. A 2013 study by the Massachusetts Institute of Technology (MIT) indicates that 53,000 early deaths occur per year in the United States alone because of vehicle emissions. According to another study from the same university, traffic fumes alone cause the death of 5,000 people every year just in the United Kingdom. Compo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guinness World Record
''Guinness World Records'', known from its inception in 1955 until 1999 as ''The Guinness Book of Records'' and in previous United States editions as ''The Guinness Book of World Records'', is a reference book published annually, listing world records both of human achievements and the extremes of the natural world. The brainchild of Sir Hugh Beaver, the book was co-founded by twin brothers Norris and Ross McWhirter in Fleet Street, London, in August 1955. The first edition topped the best-seller list in the United Kingdom by Christmas 1955. The following year the book was launched internationally, and as of the 2022 edition, it is now in its 67th year of publication, published in 100 countries and 23 languages, and maintains over 53,000 records in its database. The international franchise has extended beyond print to include television series and museums. The popularity of the franchise has resulted in ''Guinness World Records'' becoming the primary international authority o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Certification
A type certificate signifies the airworthiness of a particular category of aircraft, according to its manufacturing design (''type design''). It confirms that the aircraft of a new type intended for serial production, is in compliance with applicable airworthiness requirements established by the national air law. For up to three seats, primary category aircraft, certification costs around US$1m, US$25m for a general aviation aircraft and hundreds of millions of dollars for a commercial aircraft; certification delays can cost millions of dollars and can decide a program's profitability. Authority A type certificate (TC) is issued to signify the airworthiness of the approved design or "type" of an aircraft to be manufactured. The TC is issued by a regulatory authority, and once issued, the design cannot be changed unless at least part of the process for certification is repeated to cover the changes. The TC reflects a determination made by a regulatory authority that the type desig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
777-9
The Boeing 777X is the latest series of the long-range, wide-body, twin-engine jetliners in the Boeing 777 family from Boeing Commercial Airplanes. The 777X features new GE9X engines, new composite wings with folding wingtips, greater cabin width and seating capacity, and technologies from the Boeing 787. The 777X was launched in November 2013 with two variants: the 777-8 and the 777-9. The 777-8 provides seating for 384 passengers and has a range of 8,730 nmi (16,170 km) while the 777-9 has seating for 426 passengers and a range of over 7,285 nmi (13,500 km). The 777X program was proposed in the early 2010s with assembly at the Boeing Everett Factory and the wings built at a new building adjacent to the Everett factory. , there are 341 total orders for the 777X passenger and freighter versions from eight identified customers and other buyers. The 777-9 first flew on January 25, 2020, with deliveries delayed multiple times and expected to commence in 2025. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Victorville, California
Victorville is a city in Victor Valley in San Bernardino County, California. Its population as of the 2020 census was 134,810. History In 1858, Aaron G. Lane came to what is now known as Victorville and founded a waystation called "Lane's Crossing." For many years it provided shelter and supplies for people journeying across the desert from the east to San Bernardino. Lane's Crossing was on the Mojave River on today's Turner Road, two miles north of where Interstate 15 crosses the river. Lane was a veteran of the Mexican–American War who had had malaria during that war. Originally he migrated west to join the California gold rush, but he learned that he could make a better living selling supplies to the miners. Lane settled in Ione, near Sutter's Mill in northern California, during those years, but migrated to San Bernardino in 1857. He settled on the Mojave River in 1858, where he established his waystation. He later sold out to Texan John Fry Miller, who changed the name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evendale, Ohio
Evendale (pronounced ) is a village in Hamilton County, Ohio, United States, within the Cincinnati metropolitan area. The population was 2,767 at the 2010 census. Geography Evendale is located at (39.247509, -84.431094). According to the United States Census Bureau, the village has a total area of , all land. Demographics 2010 census As of the census of 2010, there were 2,767 people, 1,063 households, and 877 families living in the village. The population density was . There were 1,098 housing units at an average density of . The racial makeup of the village was 88.0% White, 6.5% African American, 0.3% Native American, 4.3% Asian, 0.3% from other races, and 0.6% from two or more races. Hispanic or Latino of any race were 0.4% of the population. There were 1,063 households, of which 27.8% had children under the age of 18 living with them, 75.8% were married couples living together, 4.6% had a female householder with no husband present, 2.1% had a male householder with no w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ETOPS
ETOPS () is an acronym for ''Extended-range Twin-engine Operations Performance Standards''—a special part of flight rules for one-engine-inoperative flight conditions. The International Civil Aviation Organization (ICAO) coined the acronym for twin-engine aircraft operation in airspace further than one hour from a diversion airport at the one-engine-inoperative cruise speed, over water or remote lands, or on routes previously restricted to three- and four-engine aircraft. History The first heavier-than-air, non-stop transatlantic flight was made in 1919, by John Alcock and Arthur Brown, in a twin-engine Vickers Vimy, from Newfoundland to Ireland in sixteen hours. By 1936 the Bureau of Air Commerce (the precursor to the FAA) restricted operations to within of an airport, regardless of the engine number, about 60 minutes with one engine inoperative. In 1953 the FAA "60-minute rule" restricted twin-engine aircraft to a 60-minute diversion area, based on the piston engine rel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peebles, Ohio
Peebles is a village in Meigs Township, Adams County, Ohio, United States. It is sixty-four miles east of Cincinnati. The population was 1,782 at the 2010 census. History Peebles was founded in 1881 with the building of the railroad through that territory. It was named for John G. Peebles, who was instrumental in bringing the railroad to the settlement. That railroad was the Cincinnati & Eastern Railroad, today the Cincinnati Eastern Railroad (CCET). Gallery File:PeeblesOH1.JPG, Peebles corporation limit sign. File:PeeblesOH2.JPG, Looking south on Main Street (Ohio Highway 41) in Peebles. File:PeeblesOH3.JPG, Water tower in Peebles. File:PeeblesOH4.JPG, 1957 Cairn of Peace located on the corner of Main and Elm Streets in Peebles. File:Peebles, Ohio sign.jpg, Peebles Ohio Historical Marker outlining the history of Peebles. Geography According to the United States Census Bureau, the village has a total area of , all land. Demographics The village's estimated median househo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rime Ice
Rime ice forms when supercooled water liquid droplets freeze onto surfaces. Meteorologists distinguish between three basic types of ice forming on vertical and horizontal surfaces by deposition of supercooled water droplets. There are also intermediate formations. *Soft rime is less dense than hard rime and is milky and crystalline, like sugar. Soft rime appears similar to hoar frost. *Hard rime is somewhat less milky, especially if it is not heavy. *Clear ice is transparent and homogeneous and resembles ice-cube ice in appearance. Its amorphousWikipedia:_Citing_sources.html" "title="nowiki/>Wikipedia: Citing sources">citation needed], dense structure helps it cling tenaciously to any surface on which it forms. Both rime types are less dense than clear ice and cling less tenaciously, therefore damage due to rime is generally minor compared to clear ice. Glaze ice is similar in appearance to clear ice but it is the result of a completely different process, occurring during freezi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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