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Letov Š-39
__NOTOC__ The Letov Š-39 was a sport aircraft produced in Czechoslovakia during the 1930s. It was a conventional, parasol-wing monoplane with fixed tailskid undercarriage, and seating for the pilot and passenger in tandem, open cockpits. Because the cabane struts were very short, and the wing therefore placed very close to the top of the fuselage, the cockpits had the unusual arrangement of the passenger's being in front of the wing while the pilot's was behind it. The outer half of each wing was fitted with fixed slats along the leading edge. An initial batch of 23 machines was built for use by Czech aeroclubs. These were followed by batches of aircraft with alternative powerplants. Variants ;Š-39 :Prototype with Orion LL-50 engine followed by production batch with Walter Polaris engines ;Š-139 :Production model with Pobjoy R engine and Townend ring ;Š-239 :Production model with Walter Minor 4 engine Specifications (Š-39) References * * * [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] |
Townend Ring
A Townend ring is a narrow-chord (aircraft), chord cowling ring fitted around the cylinders of an aircraft radial engine to reduce drag and improve cooling. It was patented in 1929, and found use on various aircraft of the 1930s and into the 1940s. Development The Townend ring was the invention of Dr. Hubert Townend of the United Kingdom, British National Physical Laboratory (United Kingdom), National Physical Laboratory in 1929. Patents were supported by Boulton & Paul Ltd in 1929. In the United States it was often called a "drag ring". It caused a reduction in the drag of radial engines and was widely used in high-speed designs of 1930–1935, before the long-chord NACA cowling came into general use. Despite suggestions of it exploiting the Meredith effect, low airspeeds, low temperature differences and small mass flows make that unlikely, particularly when combined with the lack of flow control as the air exits the cowling.Becker, J.; ''The high-speed frontier: Case h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasol-wing Aircraft
A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplane (aeronautics), multiplanes, which have multiple wings. A monoplane has inherently the highest efficiency and lowest drag of any wing configuration and is the simplest to build. However, during the early years of flight, these advantages were offset by its greater weight and lower manoeuvrability, making it relatively rare until the 1930s. Since then, the monoplane has been the most common form for a fixed-wing aircraft. Characteristics Support and weight The inherent efficiency of the monoplane is best achieved in the cantilever wing, which carries all structural forces internally. However, to fly at practical speeds the wing must be made thin, which requires a heavy structure to make it strong and stiff enough. External Bracing (aeronautics), bracing can be used to improve structural efficiency, reducing weight and cost. For a wing of a given size, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Letov Aircraft
Letov can refer to: * Letov Kbely, a Czech (and Czechoslovak) aircraft company * Yegor Letov Igor "Yegor" Fyodorovich Letov (, ; (10 September 1964 – 19 February 2008) was a Russian singer-songwriter, best known as the founder and leader of the post-punk/psychedelic rock band Grazhdanskaya Oborona (), as well as the founder of the con ... (1964–2008), Russian punk rock musician, leader of the band Grazhdanskaya Oborona * Sergey Letov (born 1956), Russian saxophonist, brother of Yegor Letov {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1930s Czechoslovak Sport Aircraft
Year 193 ( CXCIII) was a common year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Sosius and Ericius (or, less frequently, year 946 ''Ab urbe condita''). The denomination 193 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * January 1 – Year of the Five Emperors: The Roman Senate chooses Publius Helvius Pertinax, against his will, to succeed the late Commodus as Emperor. Pertinax is forced to reorganize the handling of finances, which were wrecked under Commodus, to reestablish discipline in the Roman army, and to suspend the food programs established by Trajan, provoking the ire of the Praetorian Guard. * March 28 – Pertinax is assassinated by members of the Praetorian Guard, who storm the imperial palace. The Empire is auctioned off; Marcus Didius Julianus the highest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Letov Š-239 (skica) (born 1956), Russian saxophonist, brother of Yegor Letov
{{disambig ...
Letov can refer to: * Letov Kbely, a Czech (and Czechoslovak) aircraft company * Yegor Letov (1964–2008), Russian punk rock musician, leader of the band Grazhdanskaya Oborona * Sergey Letov DK () was a cult Soviet underground rock band founded in Moscow in 1980 by its drummer and leader Sergey Zharikov. It was one of the first Soviet and Russian experimental rock bands. DK was known for the dirty art punk style, sound that combined ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter Minor 4
The Walter Minor is a family of four- and six-cylinder inverted inline air-cooled engines, developed under auspices of ing. Šimůnek and used on light aircraft. First produced in 1929, the Minor engines' family has an advanced design for the period and sports steel cylinders, aluminum heads and overhead valves, with identical bore and stroke of and , respectively. Typical power ratings varied from . After Walter concentrated on the turbine powerplants only, the production of piston engines has been transferred to the Avia company that further developed the family, bringing fuel injection, as the Avia M-137 and M-337. Nowadays the smallest of the family, the four-cylinder carburetted Minor, is produced by a small company in the Czech Republic, while the M337 was available from the LOM Prague. Variants 4 Cylinder ;Minor 4-I: ;Minor 4-II: ;Minor 4-III: ;Minor 4-IIIS: A 4-III fitted with a crankshaft driven supercharger. ;Minor M 332 (4 cyl.) 6 Cylinder ;Minor 6-I: ;Minor 6-II ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pobjoy R
The Pobjoy R is a British seven-cylinder air-cooled radial aircraft engine designed and built by Pobjoy Airmotors. Introduced in 1926, it was a popular engine for ultralight and small aircraft in the 1930s. A notable feature of the Pobjoy R was the propeller reduction gear which allowed the small engine to operate at more desirable higher speeds. The engine was license produced in Czechoslovakia by Walter Aircraft Engines as the Walter Mira. Retrieved: 27 November 2021 Variants ;Walter Mira R :License produced version of Pobjoy R. ;Walter Mi ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft/page Content
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 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'' 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter Polaris
The Walter Polaris was a Czechoslovak three-cylinder, air-cooled radial engine for powering light aircraft that was developed in the 1930s.Gunston 1989, p. 174. Applications *Letov Š-39 * Rearwin Junior Engines on display A preserved example of the Walter Polaris engine is on display at the following museum: *Prague Aviation Museum, Kbely Specifications (Polaris) See also References Notes Bibliography * Gunston, Bill. ''World Encyclopedia of Aero Engines''. Cambridge, England. Patrick Stephens Limited, 1989. {{Aeroengine-specs 1930s aircraft piston engines Polaris Polaris is a star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris (Latinisation of names, Latinized to ''Alpha Ursae Minoris'') and is commonly called the North Star or Pole Star. With an ... Aircraft air-cooled radial piston engines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orion LL-50
Orion may refer to: Common meanings * Orion (constellation), named after the mythical hunter * Orion (mythology), a hunter in Greek mythology Arts and media Fictional entities Characters and species * Orion (character), a DC Comics character * Orion (''Star Trek''), a sentient alien species * Orion, code name of Stephen J. Bartowski on the television show ''Chuck'' * Orion, in the fighting game ''Brawlhalla'' * Orions, a race in the '' Starfire'' board game and book series * Orion, a character from ''Power Rangers Super Megaforce'' * Captain Orion, in the Japanese series ''X-Bomber'' * Orion Pax, the former name of Optimus Prime. Orion Black, the father of Sirius Black and Regulus Black, in the Harry Potter Series Vessels * ''Orion'', a spaceplane in the film ''2001: A Space Odyssey'' * ''Orion'', a spaceship in '' Raumpatrouille Orion'' (''Space Patrol Orion'' in English), the first German science fiction television series * ''"Orion"''-class spaceship, on the te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
