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Šoštarić Vrabac
The Soštarić Vrabac, ( sr, Врабац / Vrabac - sparrow), was a primary glider for basic pilot training designed and built in the Kingdom of Yugoslavia in 1939. Design and development Of mixed composition, mostly wood and canvas, with undercarriage skis for landing, the Vrabac was designed by engineer Ivo Šoštarić in 1939, inspired by the success of the Zögling, a German primary glider. Unlike the Zögling, the Vrabac was not wire-braced, lacking a kingpost and using struts to brace the wings to the lower fuselage. During tests at Vršac the Vrabac showed far better flight characteristics than not only its German exemplar, but also from the Polish Kocjan Wrona. Production of 15 aircraft in two versions - A and B began in 1939, as the first serially built glider in Serbia. Production continued after World War II and more than 150 were made. Due to the simple design of this glider, it was also made in local aeroclubs' workshops during the winter, so that they could b ... [...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] |
Kingpost
A king post (or king-post or kingpost) is a central vertical post used in architectural or bridge designs, working in tension to support a beam below from a truss apex above (whereas a crown post, though visually similar, supports items above from the beam below). In aircraft design a strut called a king post acts in compression, similarly to an architectural crown post. Usage in mechanical plant and marine engineering differs again, as noted below. Architecture A king post extends vertically from a crossbeam (the tie beam) to the apex of a triangular truss. The king post, itself in tension, connects the apex of the truss with its base, holding up the tie beam (also in tension) at the base of the truss. The post can be replaced with an iron rod called a king rod (or king bolt) and thus a king rod truss. The king post truss is also called a "Latin truss". In traditional timber framing, a crown post looks similar to a king post, but it is very different structurally: whereas th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pančevo
Pančevo (Serbian Cyrillic: Панчево, ; german: Pantschowa; hu, Pancsova; ro, Panciova; sk, Pánčevo) is a city and the administrative center of the South Banat District in the autonomous province of Vojvodina, Serbia. It is located on the shores of rivers Tamiš and Danube, in the southern part of Banat region. Since the 2011 census 123,414 people have been living in the Pančevo administrative area. Pančevo is the fourth largest city in Vojvodina and the ninth largest in Serbia by population. Pančevo was first mentioned in 1153 and was described as an important mercantile place. It gained the status of a city in 1873 following the disestablishment of the Military Frontier in that region. For most of its period, it was the part of the Kingdom of Hungary and after 1920 it became part of the Kingdom of Serbs, Croats and Slovenes, which was renamed in 1929 to Yugoslavia. Since then with one interruption it was part of several Yugoslav states and after the dissolution ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serbia
Serbia (, ; Serbian language, Serbian: , , ), officially the Republic of Serbia (Serbian language, Serbian: , , ), is a landlocked country in Southeast Europe, Southeastern and Central Europe, situated at the crossroads of the Pannonian Basin and the Balkans. It shares land borders with Hungary to the north, Romania to the northeast, Bulgaria to the southeast, North Macedonia to the south, Croatia and Bosnia and Herzegovina to the west, and Montenegro to the southwest, and claims a border with Albania through the Political status of Kosovo, disputed territory of Kosovo. Serbia without Kosovo has about 6.7 million inhabitants, about 8.4 million if Kosvo is included. Its capital Belgrade is also the List of cities in Serbia, largest city. Continuously inhabited since the Paleolithic Age, the territory of modern-day Serbia faced Slavs#Migrations, Slavic migrations in the 6th century, establishing several regional Principality of Serbia (early medieval), states in the early Mid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kocjan Wrona
The Warsztaty Szybowcowe Wrona (), or Kocjan Wrona after its designer, was the most numerous and widely used Polish pre-war primary glider. Design and development Designed by Antoni Kocjan, the Wrona was in competition with the Czerwiński and Jaworski CWJ flown in 1931. Both were simple, high-wing and open frame (flat, uncovered girder fuselage) gliders in the style of the earlier German Zögling. With LOPP funding five pre-production airframes were built by Warsztaty Szybowcowe, the first flying from Mokotów on 6 September 1932. Its two-part wing, mounted on top of the fuselage, was rectangular in plan and built around two spars. It was plywood-covered ahead of the forward spar, forming a torsion-resistant D-box, with the rest fabric-covered. On each side a pair of parallel struts braced the spars to the lower fuselage. Long, rectangular ailerons reached from strut to tip. The upper and lower longerons or chords of the open-frame fuselage were joined together with ve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vršac
Vršac ( sr-cyr, Вршац, ; hu, Versec; ro, Vârșeț) is a List of cities in Serbia, city and the administrative centre of the South Banat District in the autonomous province of Vojvodina, Serbia. As of 2011, the city urban area had a population of 35,701, while the city administrative area had 52,026 inhabitants. It is located in the geographical region of Banat. Name The name ''Vršac'' is of Serbian language, Serbian origin, ultimately deriving from Proto-Slavic wikt:Reconstruction:Proto-Slavic/vьrxъ, *vьrxъ, meaning "summit" In Serbian, the city is known as Вршац or ''Vršac'', in Romanian language, Romanian as ''Vârșeț'', in Hungarian language, Hungarian as ''Versec'' or ''Versecz'', in German language, German as ''Werschetz'', and in Turkish language, Turkish as ''Virşac'' or ''Verşe''. History There are traces of human settlement from the paleolithic, Palaeolithic and Neolithic periods. Remains from two types of Neolithic cultures have been discovered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strut
A strut is a structural component commonly found in engineering, aeronautics, architecture and anatomy. Struts generally work by resisting longitudinal compression, but they may also serve in tension. Human anatomy Part of the functionality of the clavicle is to serve as a strut between the scapula and sternum, resisting forces that would otherwise bring the upper limb close to the thorax. Keeping the upper limb away from the thorax is vital for its range of motion. Complete lack of clavicles may be seen in cleidocranial dysostosis, and the abnormal proximity of the shoulders to the median plane exemplifies the clavicle's importance as a strut. Architecture and construction Strut is a common name in timber framing for a support or brace of scantlings lighter than a post. Frequently struts are found in roof framing from either a tie beam or a king post to a principal rafter. Struts may be vertically plumb or leaning (then called canted, raking, or angled) and may be straight ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft/page Content
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] |
Primary Glider
Primary gliders are a category of aircraft that enjoyed worldwide popularity during the 1920s and 1930s as people strove for simple and inexpensive ways to learn to fly.Schweizer, Paul A: ''Wings Like Eagles, The Story of Soaring in the United States'', pages 14-22. Smithsonian Institution Press, 1988. Constructed of wood, metal cables and cloth, primary gliders were very light and easy to fly. They generally had no cockpit and no instruments. Operations Primary gliders were generally launched by bungee cord, whereby a rubber rope was arranged in a "V" with the glider at the apex. The ends of the rope were pulled by hand to launch the glider from a slope. Primaries were also launched by auto-tow Gliding is a recreational activity and competitive air sport in which pilots fly unpowered aircraft known as gliders or sailplanes using naturally occurring currents of rising air in the atmosphere to remain airborne. The word ''soaring'' is al ... and auto-bungee tow. Ramp launching ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Old World Sparrow
Old World sparrows are a group of small passerine birds forming the family Passeridae. They are also known as true sparrows, a name also used for a particular genus of the family, ''Passer''. They are distinct from both the New World sparrows, in the family Passerellidae, and from a few other birds sharing their name, such as the Java sparrow of the family Estrildidae. Many species nest on buildings and the house and Eurasian tree sparrows, in particular, inhabit cities in large numbers. They are primarily seed-eaters, though they also consume small insects. Some species scavenge for food around cities and, like gulls or pigeons, will eat small quantities of a diversity of items. Description Generally, Old World sparrows are small, plump, brown and grey birds with short tails and stubby, powerful beaks. The differences between sparrow species can be subtle. Members of this family range in size from the chestnut sparrow (''Passer eminibey''), at and , to the parrot-billed spa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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