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J-22 Orao
The Soko J-22 Orao ( sr-cyr, text=Oрао, translation=eagle) is a Yugoslavian/ Serbian twin-engined, subsonic ground-attack and aerial reconnaissance aircraft. It was developed and built in collaboration by SOKO in Yugoslavia and by Avioane Craiova in neighbouring Romania, being known in the latter as the IAR-93 Vultur. The Orao was designed as either a single-seat main attack version or as a combat-capable twin-seat version, the latter being principally intended for advanced flight- and weapons-training duties. It was developed as a joint Yugoslav-Romanian project, known as YuRom, during the 1970s. Early ambitions to produce a supersonic fighter were scuppered by Britain's unwillingness to permit the desired engine to be license-produced in Eastern Europe. Further difficulties in fitting an afterburner to the older Rolls-Royce Viper also hindered development and the performance of early-build aircraft. First flying during November 1974, the resulting aircraft would equi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft
A WikiProject, or Wikiproject, is an affinity group for contributors with shared goals within the Wikimedia movement. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within Wikimedia project, sibling 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 outsi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Romania
Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to the east, and the Black Sea to the southeast. It has a mainly continental climate, and an area of with a population of 19 million people. Romania is the List of European countries by area, twelfth-largest country in Europe and the List of European Union member states by population, sixth-most populous member state of the European Union. Europe's second-longest river, the Danube, empties into the Danube Delta in the southeast of the country. The Carpathian Mountains cross Romania from the north to the southwest and include Moldoveanu Peak, at an altitude of . Bucharest is the country's Bucharest metropolitan area, largest urban area and Economy of Romania, financial centre. Other major urban centers, urban areas include Cluj-Napoca, Timiș ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soko J-21 Jastreb
The Soko J-21 ''Jastreb'' (from sr-Cyrl, јастреб, translation=hawk), referred to as the J-1 ''Jastreb'' in some sources, is a SFR Yugoslavia, Yugoslav single-seat, single-engined, light attack aircraft, designed by the Aeronautical Technical Institute (ATI) and Military Technical Institute (VTI), in Belgrade, and manufactured by SOKO in Mostar. Derived from the G-2 Galeb advanced jet trainer and light attack aircraft, it was designed in single-seat Close air support, ground-attack and Tandem#Aviation, two-seat advanced flying/weapon Flight_training, training versions. Design and development The J-21 Jastreb was developed as a replacement for the Republic F-84 Thunderjet, which had been the most commonly used turbojet fighter-bomber aircraft of the Yugoslav Air Force until 1967. On the basis of the G-2 Galeb, the J-21 Jastreb was developed as a single-seat, ground-attack variant, flying for the first time on 19 July 1965. Pilots sit on licence-built Folland Aircraft, Foll ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soviet Union
The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet Union, it dissolved in 1991. During its existence, it was the list of countries and dependencies by area, largest country by area, extending across Time in Russia, eleven time zones and sharing Geography of the Soviet Union#Borders and neighbors, borders with twelve countries, and the List of countries and dependencies by population, third-most populous country. An overall successor to the Russian Empire, it was nominally organized as a federal union of Republics of the Soviet Union, national republics, the largest and most populous of which was the Russian SFSR. In practice, Government of the Soviet Union, its government and Economy of the Soviet Union, economy were Soviet-type economic planning, highly centralized. As a one-party state go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicolae Ceaușescu
Nicolae Ceaușescu ( ; ; – 25 December 1989) was a Romanian politician who was the second and last Communism, communist leader of Socialist Romania, Romania, serving as the general secretary of the Romanian Communist Party from 1965 until Trial and execution of Nicolae and Elena Ceaușescu, his execution in 1989. Widely regarded as a dictator, he was the country's head of state from 1967 to 1989, serving as President of the State Council of Romania, State Council from 1967 and as the first President of Romania, president from 1974. He was overthrown and executed in the Romanian Revolution on 25 December 1989 along with his wife Elena Ceaușescu, as part of a series of Anti-communism, anti-communist uprisings in Eastern Europe that year. Born in 1918 in Scornicești, Ceaușescu was a member of the Romanian Communist youth movement. He was arrested in 1939 and sentenced for "conspiracy against social order", spending the time during World War II in prisons and internment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Josip Broz Tito
Josip Broz ( sh-Cyrl, Јосип Броз, ; 7 May 1892 – 4 May 1980), commonly known as Tito ( ; , ), was a Yugoslavia, Yugoslav communist revolutionary and politician who served in various positions of national leadership from 1943 until his death in 1980. During World War II, he led the Yugoslav Partisans, often regarded as the most effective Resistance during World War II, resistance movement in German-occupied Europe. Following Yugoslavia's liberation in 1945, he served as its Prime Minister of Yugoslavia, prime minister from 1945 to 1963, and President of Yugoslavia, president from 1953 until his death in 1980. The political ideology and policies promulgated by Tito are known as Titoism. Tito was born to a Croat father and a Slovene mother in Kumrovec in what was then Austria-Hungary. Drafted into military service, he distinguished himself, becoming the youngest sergeant major in the Austro-Hungarian Army of that time. After being seriously wounded and captured by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Head Of State
A head of state is the public persona of a sovereign state.#Foakes, Foakes, pp. 110–11 "[The head of state] being an embodiment of the State itself or representative of its international persona." The name given to the office of head of state depends on the country's form of government and any separation of powers; the powers of the office in each country range from being also the head of government to being little more than a ceremonial figurehead. In a parliamentary system, such as Politics of India, India or the Politics of the United Kingdom, United Kingdom, the head of state usually has mostly ceremonial powers, with a separate head of government. However, in some parliamentary systems, like Politics of South Africa, South Africa, there is an executive president that is both head of state and head of government. Likewise, in some parliamentary systems the head of state is not the head of government, but still has significant powers, for example Politics of Morocco, Moro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Research And Development
Research and development (R&D or R+D), known in some countries as OKB, experiment and design, is the set of innovative activities undertaken by corporations or governments in developing new services or products. R&D constitutes the first stage of development of a potential new service or the production process. Although R&D activities may differ across businesses, the primary goal of an R&D department is to new product development, develop new products and services. R&D differs from the vast majority of corporate activities in that it is not intended to yield immediate profit, and generally carries greater risk and an uncertain return on investment. R&D is crucial for acquiring larger shares of the market through new products. ''R&D&I'' represents R&D with innovation. Background New product design and development is often a crucial factor in the survival of a company. In a global industrial landscape that is changing fast, firms must continually revise their design and range of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yugoslavia
, common_name = Yugoslavia , life_span = 1918–19921941–1945: World War II in Yugoslavia#Axis invasion and dismemberment of Yugoslavia, Axis occupation , p1 = Kingdom of SerbiaSerbia , flag_p1 = State Flag of Serbia (1882-1918).svg , p2 = Kingdom of MontenegroMontenegro , flag_p2 = Flag of the Kingdom of Montenegro.svg , p3 = State of Slovenes, Croats and Serbs , flag_p3 = Flag of the State of Slovenes, Croats and Serbs.svg , p4 = Austria-Hungary , flag_p4 = Flag of Austria-Hungary (1867-1918).svg , p7 = Free State of FiumeFiume , flag_p7 = Flag of the Free State of Fiume.svg , s1 = Croatia , flag_s1 = Flag of Croatia (1990).svg , s2 = Slovenia , flag_s2 = Flag of Slovenia.svg , s3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yugoslav Wars
The Yugoslav Wars were a series of separate but related#Naimark, Naimark (2003), p. xvii. ethnic conflicts, wars of independence, and Insurgency, insurgencies that took place from 1991 to 2001 in what had been the Socialist Federal Republic of Yugoslavia (SFR Yugoslavia). The conflicts both led up to and resulted from the breakup of Yugoslavia, which began in mid-1991, into six independent countries matching the six Republics of Yugoslavia, entities known as republics that had previously constituted Yugoslavia: Slovenia, Croatia, Bosnia and Herzegovina, Montenegro, Serbia, and North Macedonia, Macedonia (now Macedonia naming dispute, called North Macedonia). SFR Yugoslavia's constituent republics declared independence due to rising nationalism. Unresolved tensions between ethnic minorities in the new countries led to the wars. While most of the conflicts ended through peace accords that involved full international recognition of new states, they resulted in a massive number of d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mach Number
The Mach number (M or Ma), often only Mach, (; ) 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 Austrian 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). The local speed of sound, and hence the Mach number, depends on the temperature of the surrounding gas. The Mach number is primarily used to determine the approximation with which a flow can be treated as an i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armstrong Siddeley Viper
The Armstrong Siddeley Viper is a British turbojet engine developed and produced by Armstrong Siddeley and then by its successor companies Bristol Siddeley and Rolls-Royce Limited. It entered service in 1953 and remained in use with the Royal Air Force, powering its Dominie T1 navigation training aircraft until January 2011. Design and development The design originally featured a seven-stage compressor based on their Adder engine — the Viper is in effect a large-scale Adder. Like the similar J85 built in United States, the Viper was originally developed as an expendable engine for production versions of the Jindivik target drone. Like the J85, the limited-life components and total-loss oil systems were replaced with standard systems for use in crewed aircraft. Because it was initially developed as an expendable engine, the Viper was subject to many recurring maintenance issues. This led to the development of the first Power by the Hour program in which operator ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
