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ATRA-90
The Advanced Technology Regional Aircraft 90 (ATRA-90) was a propfan-powered regional aircraft that was proposed in 1986. Conceived by Industri Pesawat Terbang Nusantara (IPTN) of Indonesia, the multi-national project was also backed by Boeing of the United States, Fokker of the Netherlands, and Messerschmitt-Bölkow-Blohm (MBB) of West Germany West Germany is the colloquial term used to indicate the Federal Republic of Germany (FRG; german: Bundesrepublik Deutschland , BRD) between its formation on 23 May 1949 and the German reunification through the accession of East Germany on 3 O .... The ATRA-90 was targeted for introduction between 1992 and 1995, but the project was put on hold in 1988. Design The aircraft was designed to transport between 83 and 115 passengers a distance of . It would cruise at a speed of Mach 0.8 and an altitude of . References Bibliography * * ** {{refend __FORCETOC__ Abandoned civil aircraft projects Propfan-powered aircraft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propfan
A propfan, also called an open rotor engine, or unducted fan (as opposed to a ducted fan), is a type of aircraft engine related in concept to both the turboprop and turbofan, but distinct from both. The design is intended to offer the speed and performance of a turbofan, with the fuel economy of a turboprop. A propfan is typically designed with a large number of short, highly twisted blades, similar to the (ducted) fan in a turbofan engine. For this reason, the propfan has been variously described as an "unducted fan" (UDF) or an "ultra-high-bypass (UHB) turbofan." Definition In the 1970s, Hamilton Standard described its propfan as "a small diameter, highly loaded multiple bladed variable pitch propulsor having swept blades with thin advanced airfoil sections, integrated with a nacelle contoured to retard the airflow through the blades thereby reducing compressibility losses and designed to operate with a turbine engine and using a single stage reduction gear resulting i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mach Number
Mach number (M or Ma) (; ) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. It is named after the Moravian physicist and philosopher Ernst Mach. : \mathrm = \frac, where: : is the local Mach number, : is the local flow velocity with respect to the boundaries (either internal, such as an object immersed in the flow, or external, like a channel), and : is the speed of sound in the medium, which in air varies with the square root of the thermodynamic temperature. By definition, at Mach1, the local flow velocity is equal to the speed of sound. At Mach0.65, is 65% of the speed of sound (subsonic), and, at Mach1.35, is 35% faster than the speed of sound (supersonic). Pilots of high-altitude aerospace vehicles use flight Mach number to express a vehicle's true airspeed, but the flow field around a vehicle varies in three dimensions, with corresponding variations in local Mach number. The local spe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DjVu
DjVu ( , like French "déjà vu") is a computer file format designed primarily to store scanned documents, especially those containing a combination of text, line drawings, indexed color images, and photographs. It uses technologies such as image layer separation of text and background/images, progressive loading, arithmetic coding, and lossy compression for bitonal (monochrome) images. This allows high-quality, readable images to be stored in a minimum of space, so that they can be made available on the web. DjVu has been promoted as providing smaller files than PDF for most scanned documents. The DjVu developers report that color magazine pages compress to 40–70 kB, black-and-white technical papers compress to 15–40 kB, and ancient manuscripts compress to around 100 kB; a satisfactory JPEG image typically requires 500 kB. Like PDF, DjVu can contain an OCR text layer, making it easy to perform copy and paste and text search operations. Free creators, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NRC Handelsblad
''NRC'', previously called ''NRC Handelsblad'' (), is a daily morning newspaper published in the Netherlands by NRC Media. It is generally accepted as a newspaper of record in the Netherlands. History ''NRC Handelsblad'' was first published on 1 October 1970 after a merger of the Amsterdam newspaper ''Algemeen Handelsblad'' (founded 1828 by J.W. van den Biesen) and the Rotterdam ''Nieuwe Rotterdamsche Courant'' (founded 1844 by Henricus Nijgh). The paper's motto is ''Lux et Libertas'' – Light (referring to the Age of Enlightenment) and Freedom. Editor was succeeded on 12 December 2006, by . After a dispute with the new owners Donker had to step down on 26 April 2010 and was replaced by Belgian . In 2019, he was succeeded by René Moerland. On 7 March 2011, the paper changed its format from broadsheet to tabloid. The circulation of ''NRC Handelsblad'' in 2014 was 188,500 copies, putting it in 4th place among the national dailies. In 2015 the NRC Media group was acquired by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agence France-Presse
Agence France-Presse (AFP) is a French international news agency headquartered in Paris, France. Founded in 1835 as Havas, it is the world's oldest news agency. AFP has regional headquarters in Nicosia, Montevideo, Hong Kong and Washington, D.C., and news bureaus in 151 countries in 201 locations. AFP transmits stories, videos, photos and graphics in French, English, Arabic, Portuguese, Spanish, and German. History Agence France-Presse has its origins in the Agence Havas, founded in 1835 in Paris by Charles-Louis Havas, making it the world's oldest news service. The agency pioneered the collection and dissemination of news as a commodity, and had established itself as a fully global concern by the late 19th century. Two Havas employees, Paul Julius Reuter and Bernhard Wolff, set up their own news agencies in London and Berlin respectively. In 1940, when German forces occupied France during World War II, the news agency was taken over by the authorities and renamed "Office fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Herald Tribune
The ''International Herald Tribune'' (''IHT'') was a daily English-language newspaper published in Paris, France for international English-speaking readers. It had the aim of becoming "the world's first global newspaper" and could fairly be said to have met that goal. It published under the name ''International Herald Tribune'' from 1967 to 2013. Early years In 1887, James Gordon Bennett Jr. created a Paris edition of his newspaper the '' New York Herald''. He called it the ''Paris Herald''. When Bennett Jr. died, the paper came under the control of Frank Munsey, who bought it along with its parent. In 1924, Munsey sold the paper to the family of Ogden Reid, owners of the ''New-York Tribune'', creating the '' New York Herald Tribune'', while the Paris edition became the ''Paris Herald Tribune''. By 1967, the paper was owned jointly by Whitney Communications, ''The Washington Post'' and ''The New York Times'', and became known as the ''International Herald Tribune'', or ''IHT'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air And Cosmos
''Air & Cosmos'' is a French-language weekly industry magazine that covers the aerospace sector. The first issue was published on 25 March 1963. As of 2013, the magazine is the leading industry magazine in the French language; and one of the top three industry magazines, the other two being English-language publications ''Aviation Week & Space Technology'' and ''Flight International''. The magazine is owned by Discom, who bought it in 2013. History In 1963, many contributors from '' Les Ailes'' (English: "Wings"; published: 1921-1963) were also published in ''Air & Cosmos''. The founding publisher Eugène Bollard stated that the magazine would cover aviation fans, aviation advocacy, commercial aviation, aeronautic sector, astronautic sector, military aviation, general aviation, and youth interest. The founding editor, Jean-Marie Riche, had been assistant editor at ''Les Ailes''. The first assistant editor, Roland Desbarbieux, had been assistant editor at ''L'Air et l'Espace'' (Engl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foreign Broadcast Information Service
The Foreign Broadcast Information Service (FBIS) was an open source intelligence component of the Central Intelligence Agency's Directorate of Science and Technology. It monitored, translated, and disseminated within the U.S. government openly available news and information from media sources outside the United States. Its headquarters was in Rosslyn, later Reston, Virginia, and it maintained approximately 20 monitoring stations worldwide. In November 2005, it was announced that FBIS would become the newly formed Open Source Center, tasked with the collection and analysis of publicly available intelligence. History On 26 February 1941, President Roosevelt directed that $150,000 be allocated for creation of the Foreign Broadcast Monitoring Service (FBMS) under the authority of the Federal Communications Commission. The mandate of the FBMS was to record, translate, transcribe and analyze shortwave propaganda radio programs that were being beamed at the United States by the Axis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flight International
''Flight International'' is a monthly magazine focused on aerospace. Published in the United Kingdom and founded in 1909 as "A Journal devoted to the Interests, Practice, and Progress of Aerial Locomotion and Transport", it is the world's oldest continuously published aviation news magazine. ''Flight International'' is published by DVV Media Group. Competitors include Jane's Information Group and ''Aviation Week''. Former editors of, and contributors include H. F. King, Bill Gunston, John W. R. Taylor and David Learmount. History The founder and first editor of ''Flight'' was Stanley Spooner. He was also the creator and editor of ''The Automotor Journal'', originally titled ''The Automotor Journal and Horseless Vehicle''.Guide To British Industrial History: Biographies: ''Stan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Germany
West Germany is the colloquial term used to indicate the Federal Republic of Germany (FRG; german: Bundesrepublik Deutschland , BRD) between its formation on 23 May 1949 and the German reunification through the accession of East Germany on 3 October 1990. During the Cold War, the western portion of Germany and the associated territory of West Berlin were parts of the Western Bloc. West Germany was formed as a political entity during the Allied occupation of Germany after World War II, established from eleven states formed in the three Allied zones of occupation held by the United States, the United Kingdom, and France. The FRG's provisional capital was the city of Bonn, and the Cold War era country is retrospectively designated as the Bonn Republic. At the onset of the Cold War, Europe was divided between the Western and Eastern blocs. Germany was divided into the two countries. Initially, West Germany claimed an exclusive mandate for all of Germany, representing itself as t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regional Aircraft
A regional airliner or a feederliner is a small airliner that is designed to fly up to 100 passengers on short-haul flights, usually feeding larger carriers' airline hubs from small markets. This class of airliners is typically flown by the regional airlines that are either contracted by or subsidiaries of the larger airlines. Regional airliners are used for short trips between smaller towns or from a larger city to a smaller city. Feederliner, commuter, and local service are all alternative terms for the same class of flight operations. History To keep short routes economical, airlines preferred using second hand aircraft than costlier new aircraft. Older aircraft were put into short haul service as they were replaced by new longer-range designs. Post-war era Propeller aircraft of larger airlines were transferred to smaller airlines: even the De Havilland Dragon Rapide biplane, or the Douglas DC-3s, in large surplus after the war, which the Aircraft manufacturers wanted to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Messerschmitt-Bölkow-Blohm
Messerschmitt-Bölkow-Blohm (MBB) was a West German aerospace manufacturer. It was formed during the late 1960s as the result of efforts to consolidate the West German aerospace industry; aircraft manufacturer Messerschmitt AG merged with the civil engineering and aviation firm Bölkow during 1968, while rival aircraft manufacturer Hamburger Flugzeugbau was acquired by the company in the following year. The company was responsible for the development and manufacture of various aircraft during its existence. Among its best-known products was the MBB Bo 105 light twin-engine helicopter and its enlarged derivative, the MBB/Kawasaki BK 117. MBB was also a key early partner on the Airbus A300, a wide-body twin-jet airliner; the company's involvement in the A300's development and production led to it forming a key component of the multinational Airbus consortium. It was also involved in numerous experimental aircraft programmes, such as the MBB Lampyridae, an aborted stealth aircraft. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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