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On Mark Marksman
The On Mark Marksman was an American high-speed civil executive aircraft converted from surplus Douglas A-26 Invader airframes by On Mark Engineering. Its antecedents were the On Mark Executive and the On Mark Marketeer. Development The On Mark Engineering Company was involved in the maintenance and conversion of Douglas A-26 Invaders for both civil and military customers from 1954 to mid-1970s, The first conversions mainly involved the removal of military equipment and replacement with fairings and civil avionics, sealing of the bomb bay doors, soundproofing, and additional cabin windows. The original "gunner's hatch" was replaced with a larger retractable entrance door, and room for baggage was provided in the nose section. They had improved brake systems and fuel systems and uprated engines with reversible-pitch propellers. About 1957 the company had developed a major modification that replaced the "carry-through" section of the rear wing spar with a circumferential steel "r ... [...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 Wikimedia project, 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 Magazine, 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 organization ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratt & Whitney R-2800-83AM-4A Double Wasp
The Pratt & Whitney R-2800 Double Wasp is an American twin-row, 18-cylinder, air-cooled radial aircraft engine with a displacement of , and is part of the long-lived Wasp family of engines. The R-2800 saw widespread use in many important American aircraft during and after World War II. During the war years, Pratt & Whitney continued to develop new ideas to upgrade the engine, including water injection for takeoff in cargo and passenger planes and to give emergency power in combat. Design and development First run in 1937, near the time that the larger competing 18-cylinder Wright Duplex-Cyclone's development had been started in May of that year, the displacement R-2800 was first-flown by 1940, one year before the Duplex-Cyclone. The Double Wasp was more powerful than the world's only other modern 18-cylinder engine, the Gnome-Rhône 18L of . The Double Wasp was much smaller in displacement than either of the other 18-cylinder designs, and heat dissipation was a grea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
On Mark Aircraft
On, on, or ON may refer to: Arts and entertainment Music * On (band), a solo project of Ken Andrews * ''On'' (EP), a 1993 EP by Aphex Twin * ''On'' (Echobelly album), 1995 * ''On'' (Gary Glitter album), 2001 * ''On'' (Imperial Teen album), 2002 * ''On'' (Elisa album), 2006 * ''On'' (Jean album), 2006 * ''On'' (Boom Boom Satellites album), 2006 * ''On'' (Tau album), 2017 * "On" (song), a 2020 song by BTS * "On", a song by Bloc Party from the 2006 album '' A Weekend in the City'' Other media * '' Ön'', a 1966 Swedish film * On (Japanese prosody), the counting of sound units in Japanese poetry * ''On'' (novel), by Adam Roberts * ONdigital, a failed British digital television service, later called ITV Digital * Overmyer Network, a former US television network Places * On (Ancient Egypt), a Hebrew form of the ancient Egyptian name of Heliopolis * On, Wallonia, a district of the municipality of Marche-en-Famenne * Ahn, Luxembourg, known in Luxembourgish as ''On'' * Ontario ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A-26 Invader
The Douglas A-26 Invader (designated B-26 between 1948 and 1965) is an American twin-engined light bomber and ground attack aircraft. Built by Douglas Aircraft Company during World War II, the Invader also saw service during several major Cold War conflicts. A limited number of highly modified United States Air Force aircraft served in Southeast Asia until 1969. It was a fast aircraft capable of carrying a large bomb load. A range of guns could be fitted to produce a formidable ground-attack aircraft.Wheeler 1992, p. 82. A redesignation of the type from A-26 to B-26 led to confusion with the Martin B-26 Marauder, which first flew in November 1940, some 20 months before the Douglas design's maiden flight. Although both aircraft were powered by the widely used Pratt & Whitney R-2800 Double Wasp 18-cylinder, double-row radial engine, they were completely different and separate designs, with some 5,300 Marauders produced to 2,503 Invaders. Design and development The A-26 was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NACA Airfoil
The NACA airfoils are airfoil shapes for aircraft wings developed by the National Advisory Committee for Aeronautics (NACA). The shape of the NACA airfoils is described using a series of digits following the word "NACA". The parameters in the numerical code can be entered into equations to precisely generate the cross-section of the airfoil and calculate its properties. Origins NACA initially developed the numbered airfoil system which was further refined by the United States Air Force at Langley Research Center. According to the NASA website: Four-digit series The NACA four-digit wing sections define the profile by: # First digit describing maximum camber as percentage of the chord. # Second digit describing the distance of maximum camber from the airfoil leading edge in tenths of the chord. # Last two digits describing maximum thickness of the airfoil as percent of the chord. For example, the NACA 2412 airfoil has a maximum camber of 2% located 40% (0.4 chords) from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Africa
South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. It is bounded to the south by of coastline that stretch along the Atlantic Ocean, South Atlantic and Indian Oceans; to the north by the neighbouring countries of Namibia, Botswana, and Zimbabwe; and to the east and northeast by Mozambique and Eswatini. It also completely Enclave and exclave, enclaves the country Lesotho. It is the southernmost country on the mainland of the Old World, and the List of countries and dependencies by population, second-most populous country located entirely south of the equator, after Tanzania. South Africa is a biodiversity hotspot, with unique biomes, plant and animal life. With over Demographics of South Africa, 60 million people, the country is the world's List of countries and dependencies by population, 24th-most populous nation and covers an area of . South Africa has three capital cities, with the executive, judicial and le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pretoria
Pretoria () is South Africa's administrative capital, serving as the seat of the executive branch of government, and as the host to all foreign embassies to South Africa. Pretoria straddles the Apies River and extends eastward into the foothills of the Magaliesberg mountains. It has a reputation as an academic city and center of research, being home to the Tshwane University of Technology (TUT), the University of Pretoria (UP), the University of South Africa (UNISA), the Council for Scientific and Industrial Research (CSIR), and the Human Sciences Research Council. It also hosts the National Research Foundation and the South African Bureau of Standards. Pretoria was one of the host cities of the 2010 FIFA World Cup. Pretoria is the central part of the City of Tshwane Metropolitan Municipality which was formed by the amalgamation of several former local authorities, including Bronkhorstspruit, Centurion, Cullinan, Hammanskraal and Soshanguve. Some have proposed ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drakensberg Truck Manufacturers
The Drakensberg (Afrikaans: Drakensberge, Zulu: uKhahlambha, Sotho: Maluti) is the eastern portion of the Great Escarpment, which encloses the central Southern African plateau. The Great Escarpment reaches its greatest elevation – within the border region of South Africa and Lesotho. The Drakensberg escarpment stretches for more than from the Eastern Cape Province in the South, then successively forms, in order from south to north, the border between Lesotho and the Eastern Cape and the border between Lesotho and KwaZulu-Natal Province. Thereafter it forms the border between KwaZulu-Natal and the Free State, and next as the border between KwaZulu-Natal and Mpumalanga Province. The escarpment winds north from there, through Mpumalanga, where it includes features such as the Blyde River Canyon, Three Rondavels, and God's Window. It then extends farther north to Hoedspruit in southeastern Limpopo where it is known as 'Klein Drakensberg' by the Afrikaner. From Hoedspruit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Van Nuys, California
Van Nuys () is a neighborhood in the central San Fernando Valley region of Los Angeles, California. Home to Van Nuys Airport and the Valley Municipal Building, it is the most populous neighborhood in the San Fernando Valley. History In 1909, the Suburban Homes Company – a syndicate led by Hobart Johnstone Whitley, general manager of the board of control, along with Harry Chandler, H. G. Otis, M. H. Sherman and O. F. Brandt – purchased 48,000 acres of the Farming and Milling Company for $2.5 million. Henry E. Huntington extended his Pacific Electric Railway (Red Cars) through the Valley to Owensmouth (now Canoga Park). The Suburban Home Company laid out plans for roads and the towns of Van Nuys, Reseda (Marian) and Canoga Park (Owensmouth). The rural areas were annexed into the city of Los Angeles in 1915. The town was founded in 1911 and named for Isaac Newton Van Nuys, a rancher, entrepreneur and one of its developers. It was annexed by Los Angeles on May 22, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Van Nuys Airport
: ''For the United States Air Force use of the airport (1942–1990), see Van Nuys Air National Guard Base'' Van Nuys Airport is a public airport in the Van Nuys neighborhood of the City of Los Angeles. The airport is operated by Los Angeles World Airports (LAWA), a branch of the Los Angeles city government, which also operates Los Angeles International Airport (LAX). Van Nuys is one of the busiest general aviation airports in the world, with the airport's two parallel runways averaging over 230,000 takeoffs and landings annually. However, , no commercial air service operates to or from Van Nuys. Van Nuys is home to news, medical transport, and tour helicopter operators, the air operations unit of the Los Angeles City Fire Department, and a maintenance base for Los Angeles Police Department and Los Angeles Department of Water and Power helicopters. Originally opened as Metropolitan Airport on December 17, 1928, the airport became the Van Nuys Army Airfield during World War ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phoenix, Arizona
Phoenix ( ; nv, Hoozdo; es, Fénix or , yuf-x-wal, Banyà:nyuwá) is the capital and most populous city of the U.S. state of Arizona, with 1,608,139 residents as of 2020. It is the fifth-most populous city in the United States, and the only U.S. state capital with a population of more than one million residents. Phoenix is the anchor of the Phoenix metropolitan area, also known as the Valley of the Sun, which in turn is part of the Salt River Valley. The metropolitan area is the 11th largest by population in the United States, with approximately 4.85 million people . Phoenix, the seat of Maricopa County, has the largest area of all cities in Arizona, with an area of , and is also the 11th largest city by area in the United States. It is the largest metropolitan area, both by population and size, of the Arizona Sun Corridor megaregion. Phoenix was settled in 1867 as an agricultural community near the confluence of the Salt and Gila Rivers and was incorporated as a ci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Mountain High School
South Mountain High School (The Academies at South Mountain) is a high school located in Phoenix, Arizona. The school is part of the Phoenix Union High School District. Overview The school was founded in 1954. The school shares its name with South Mountain, which is located south of the campus. The campus was designed by a group of noted local architects consisting of Mel Ensign as supervising architect, and H. H. Green, Lescher & Mahoney, John Sing Tang, Edward L. Varney and Weaver & Drover. The construction contract to build the school was awarded to The Wes Meyer Construction Co. The campus was heavily renovated in 2019 with ADM Group serving as architect. The school partner's elementary district is Roosevelt. School boundary Like all Phoenix Union High School District schools, students who live within a specific geographic area of Phoenix are automatically enrolled at South Mountain High School. , the school serves students in an area south of the Salt River, north ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
