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Eta (glider)
The Eta is a German-Italian Open Class two-seater flapped self-launching glider manufactured by ETA Aircraft. On introduction it was the highest performing glider. Early flights The Eta made its first flight on July 31, 2000 in Cochstedt, Germany, reaching a height of . The second flight was the first aerotow launch, reaching . The third flight was self powered and had no problems. The official presentation was on 1 August. Production Three Etas have been manufactured. The second prototype was extensively damaged in 2003 during the spin tests required for the type certification but both pilots parachuted to safety. The prototype was repaired and the tests completed successfully. The glider was to be produced by hand at a rate of about three per year. Development The Eta is an example of a trend in glider development in which private pilots initiate the development of new open class gliders. The private development of the Concordia sailplane promises a further elevation ... [...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] |
Lift-to-drag Ratio
In aerodynamics, the lift-to-drag ratio (or L/D ratio) is the Lift (force), lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air. It describes the aerodynamic efficiency under given flight conditions. The L/D ratio for any given body will vary according to these flight conditions. For an aerofoil wing or powered aircraft, the L/D is specified when in straight and level flight. For a glider it determines the Lift-to-drag ratio#Glide ratio, glide ratio, of distance travelled against loss of height. The term is calculated for any particular airspeed by measuring the lift generated, then dividing by the drag at that speed. These vary with speed, so the results are typically plotted on a 2-dimensional graph. In almost all cases the graph forms a U-shape, due to the two main components of drag. The L/D may be calculated using computational fluid dynamics or computer simulation. It is measured empirically by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2000s German Sailplanes
S, or s, is the nineteenth letter of the Latin alphabet, used in the English alphabet, the alphabets of other western European languages and other latin alphabets worldwide. Its name in English is ''ess'' (pronounced ), plural ''esses''. History Northwest Semitic šîn represented a voiceless postalveolar fricative (as in 'ip'). It originated most likely as a pictogram of a tooth () and represented the phoneme via the acrophonic principle. Ancient Greek did not have a "sh" phoneme, so the derived Greek letter Sigma () came to represent the voiceless alveolar sibilant . While the letter shape Σ continues Phoenician ''šîn'', its name ''sigma'' is taken from the letter ''Samekh'', while the shape and position of ''samekh'' but name of ''šîn'' is continued in the '' xi''. Within Greek, the name of ''sigma'' was influenced by its association with the Greek word (earlier ), "to hiss". The original name of the letter "Sigma" may have been ''san'', but due to the ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binder EB29
The Binder EB29 is a German single-seat, open-class self-launching powered sailplane designed and built by Binder Motorenbau Binder may refer to: Businesses * Binder FBM, a former German jewelry manufactory * Binder Dijker Otte & Co., the expansion of "BDO" in BDO International Computing * Binder Project, package and share interactive, reproducible environments * Fil .... Its wings are based on those of the earlier EB28, while the fuselage is newly designed.Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011-12'', page 142. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X Variants Originally available with wing extensions to give a 28.3 and 29.3 m span. Since March 2011, shorter 25.3 m wings have also been available. ;EB29 Initial single seat version developed from the EB28 edition. Available with 25.3 m, 28.3 m or 29.3 m wingspans. ;EB29D Two-seat variant. Forward fuselage lengthened by 25 cm to accommodate the second seat. Available with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schleicher ASW 22
The ASW 22 is an Open Class glider built by Alexander Schleicher GmbH & Co which first flew in 1981. The 'W' in the designation indicates that this is a product of the German designer Gerhard Waibel. An ASW 22 broke the world 750 km triangle speed record in 1985 and ASW 22s have won first place in six World Gliding Championships. Design The ASW 22 is the successor to the ASW 17. It first flew as a 22-metre glider. The span was later increased to 25 metres for the ASW 22B with a modified inner wing section and flaperons similar to the ASW 20. It uses a Horstmann and Quast wing profile on the inner section with underwing tubes to collect high-pressure air which is then expelled through turbulator holes in the bottom wing skin ahead of the flap and aileron hinge line to prevent the separation of the laminar flow. The ASW 22 has a two-wheel retractable undercarriage. Variants ;ASW 22:Open Class high-performance sailplane; 22 or 24 metre span ;ASW 22M:First motorized self ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piston Engine
A reciprocating engine, more often known as a piston engine, is a heat engine that uses one or more Reciprocating motion, reciprocating pistons to convert high temperature and high pressure into a Circular motion, rotating motion. This article describes the common features of all types. The main types are: the internal combustion engine, used extensively in motor vehicles; the steam engine, the mainstay of the Industrial Revolution; and the Stirling engine for niche applications. Internal combustion engines are further classified in two ways: either a spark-ignition engine, spark-ignition (SI) engine, where the spark plug initiates the combustion; or a compression-ignition engine, compression-ignition (CI) engine, where the air within the cylinder is compressed, Adiabatic process, thus heating it, so that the heated air ignites fuel that is injected diesel engine, then or hot-bulb engine, earlier.''Thermodynamics: An Engineering Approach'' by Yunus A. Cengal and Michael A. Boles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Two Stroke
A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston, one up and one down, in one revolution of the crankshaft in contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle. During the stroke from bottom dead center to top dead center, the end of the exhaust/intake (or scavenging) is completed along with the compression of the mixture. The second stroke encompasses the combustion of the mixture, the expansion of the burnt mixture and, near bottom dead center, the beginning of the scavenging flows. Two-stroke engines often have a higher power-to-weight ratio than a four-stroke engine, since their power stroke occurs twice as often. Two-stroke engines can also have fewer moving parts, and thus be cheaper to manufacture and weigh less. In countries and regions with stringent emissions regulation, two-stroke engines have be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Straight Engine
The straight engine (also called inline engine) is a configuration of multi-cylinder piston engine where all of the cylinders are arranged in a single row, rather than radially or in two or more cylinder banks. Design A straight engine is easier to build than an equivalent flat engine or V engine, as it uses one cylinder head rather than two. Inline engines are also narrower than flat engines or V engines; however, they are longer and can be taller. The engine balance characteristics of a straight engine depend on the number of cylinders and the firing interval. Slant engines and horizontally-mounted engines When a straight engine is mounted at an angle from the vertical it is called a ''slant engine''. Notable slant engines include the 1959-2000 Chrysler Slant-6 engine, 1961-63 Pontiac Trophy 4 engine and the 1968-1981 Triumph Slant-4 engine. Some buses and diesel multiple unit trains take this concept further by mounting the engines horizontally (i.e. with a slant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wing Loading
In aerodynamics, wing loading is the total weight of an aircraft or flying animal divided by the area of its wing. The stalling speed, takeoff speed and landing speed of an aircraft are partly determined by its wing loading. The faster an aircraft flies, the more its lift (force), lift is changed by a change in angle of attack, so a smaller wing is less adversely affected by Wind gust, vertical gusts. Consequently, faster aircraft generally have higher wing loadings than slower aircraft in order to avoid excessive response to vertical gusts. A higher wing loading also decreases maneuverability. The same constraints apply to winged biological organisms. Range of wing loadings Effect on performance Wing loading is a useful measure of the stalling speed of an aircraft. Wings generate lift owing to the motion of air around the wing. Larger wings move more air, so an aircraft with a large wing area relative to its mass (i.e., low wing loading) will have a lower stalling speed. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Janusz Centka
Janusz Centka (born 20 April 1950, in Tonowo) is a Polish glider pilot who has won two European and three World Gliding Championships.FAI IGC pilot ranking: Janusz Centka European Gliding Championships, – accessed 2008-02-02 In 2002 he established a world record in speed over a triangular course of 1000 km (144.95 km/h) in the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leszno
Leszno (, , ) is a historic city in western Poland, seat of Leszno County within the Greater Poland Voivodeship. It is the seventh-largest city in the province with an estimated population of 62,200, as of 2021. Leszno is a former residential city of prominent Polish magnate families of Leszczyński and Sułkowski family, Sułkowski, including King Stanisław Leszczyński, under whose patronage it flourished to become one of the major economic and cultural centers of Greater Poland, as reflected in the variety of landmarks, especially of the Baroque period. Located on a Expressway S5 (Poland), highway and Wrocław–Poznań railway, railway line at about half the distance between the two main cities of western Poland, Poznań and Wrocław, Leszno is the largest city of south-western Greater Poland and a major location for industry, services and tourism. It is particularly well known as the location of an annual air show with attendance reaching tens of thousands of people from var ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concordia (glider)
Concordia (mythology) is the Roman goddess who embodies agreement in marriage and society. Concordia may also refer to: Businesses and organizations Educational institutions * Concordia University (other), for Concordia University, Concordia College and Concordia Seminary * Concordia Academy (other) * Concordia High School (other) * Concordia Lutheran High School (other) * Concordia International School Shanghai, Pudong, China * Concordia Junior-Senior High School, Concordia, Kansas * Concordia Normal School, Kansas (closed 1878) * Great Western Business and Normal College, or Concordia Normal School and Business College, or Concordia Business College, in Concordia, Kansas, U.S. (closed 1930s) * Concordia Language Villages, a world-language and culture education program Other businesses and organizations * Concordia Association of Manchukuo, a 1930s–1940s political party * Concordia Healthcare, now Advanz Pharma, multinational ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
