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Georges Abrial
Georges Abrial (1898 in Paris – 1970 in Vauville, Manche) was an early France, French aerodynamics, aerodynamicist. Life After graduating from the St Cyr Aeronautical Institute he worked for Pierre Levasseur (aircraft builder), Levasseur (Levasseur-Abrial A-1) and did some pioneering work into tailless aircraft. He designed several Glider aircraft, gliders during the 1920s before turning to lecturing the following decade, when he also became influential in the French Lift (soaring), soaring movement. Abrial stopped designing new aircraft after 1932 when he abandoned his A-12 project. He was more attracted by instructorship and educational methods and played an important role in the development of soaring in France during the 1930s. After World War II, he was still active in promoting soaring in France and in French Africa. In 1954 he came back to the design of tailless aircraft, with the A-13 "Buse" project. But this glider was never built. Aircraft designs *Abrial A-2 Vautour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paris
Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, fashion, gastronomy, and science. For its leading role in the arts and sciences, as well as its very early system of street lighting, in the 19th century it became known as "the City of Light". Like London, prior to the Second World War, it was also sometimes called the capital of the world. The City of Paris is the centre of the Île-de-France region, or Paris Region, with an estimated population of 12,262,544 in 2019, or about 19% of the population of France, making the region France's primate city. The Paris Region had a GDP of €739 billion ($743 billion) in 2019, which is the highest in Europe. According to the Economist Intelli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glider (sailplane)
A glider or sailplane is a type of glider aircraft used in the leisure activity and sport of gliding (also called soaring). This unpowered aircraft can use naturally occurring currents of rising air in the atmosphere to gain altitude. Sailplanes are aerodynamically streamlined and so can fly a significant distance forward for a small decrease in altitude. In North America the term 'sailplane' is also used to describe this type of aircraft. In other parts of the English-speaking world, the word 'glider' is more common. Types Gliders benefit from producing the least drag for any given amount of lift, and this is best achieved with long, thin wings, a slender fuselage and smooth surfaces with an absence of protuberances. Aircraft with these features are able to soar – climb efficiently in rising air produced by thermals or hills. In still air, sailplanes can glide long distances at high speed with a minimum loss of height in between. Sailplanes have rigid wings and eithe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Aerospace Engineers
French (french: français(e), link=no) may refer to: * Something of, from, or related to France ** French language, which originated in France, and its various dialects and accents ** French people, a nation and ethnic group identified with France ** French cuisine, cooking traditions and practices Fortnite French places Arts and media * The French (band), a British rock band * French (episode), "French" (episode), a live-action episode of ''The Super Mario Bros. Super Show!'' * Française (film), ''Française'' (film), 2008 * French Stewart (born 1964), American actor Other uses * French (surname), a surname (including a list of people with the name) * French (tunic), a particular type of military jacket or tunic used in the Russian Empire and Soviet Union * French's, an American brand of mustard condiment * French catheter scale, a unit of measurement of diameter * French Defence, a chess opening * French kiss, a type of kiss involving the tongue See also * France (disam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1970 Deaths
Year 197 ( CXCVII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Magius and Rufinus (or, less frequently, year 950 '' Ab urbe condita''). The denomination 197 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 * February 19 – Battle of Lugdunum: Emperor Septimius Severus defeats the self-proclaimed emperor Clodius Albinus at Lugdunum (modern Lyon). Albinus commits suicide; legionaries sack the town. * Septimius Severus returns to Rome and has about 30 of Albinus's supporters in the Senate executed. After his victory he declares himself the adopted son of the late Marcus Aurelius. * Septimius Severus forms new naval units, manning all the triremes in Italy with heavily armed troops for war in the East. His soldiers embark ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1898 Births
Events January–March * January 1 – New York City annexes land from surrounding counties, creating the City of Greater New York as the world's second largest. The city is geographically divided into five boroughs: Manhattan, Brooklyn, Queens, The Bronx and Staten Island. * January 13 – Novelist Émile Zola's open letter to the President of the French Republic on the Dreyfus affair, ''J'Accuse…!'', is published on the front page of the Paris daily newspaper ''L'Aurore'', accusing the government of wrongfully imprisoning Alfred Dreyfus and of antisemitism. * February 12 – The automobile belonging to Henry Lindfield of Brighton rolls out of control down a hill in Purley, London, England, and hits a tree; thus he becomes the world's first fatality from an automobile accident on a public highway. * February 15 – Spanish–American War: The USS ''Maine'' explodes and sinks in Havana Harbor, Cuba, for reasons never fully established, killing 266 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abrial A-13 Buse
The Abrial A-13 Buse was a tailless glider prototype that was designed in 1954. It was the last in a series of glider aircraft designed by Georges Abrial. Design The glider featured a short fuselage with a single, non-tapered strut-braced straight wing. The design had been demonstrated by very complete tests carried out on a 1:10 scale model at the Eiffel Laboratory but no full-size version was ever constructed. Specifications Abrial A-13 Buse See also References {{Abrial aircraft Glider aircraft Buse Buse is a feminine given first name in Turkey, meaning "kiss" in Persian (بوسه) and Turkish, and a surname in other languages, and may refer to: Given name * Buse Arıkazan (born 1994), Turkish pole vaulters * Buse Güngör (born 1994), Turk ... Tailless aircraft High-wing aircraft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspect Ratio (aeronautics)
In aeronautics, the aspect ratio of a wing is the ratio of its span to its mean chord. It is equal to the square of the wingspan divided by the wing area. Thus, a long, narrow wing has a high aspect ratio, whereas a short, wide wing has a low aspect ratio.Kermode, A.C. (1972), ''Mechanics of Flight'', Chapter 3, (p.103, eighth edition), Pitman Publishing Limited, London Aspect ratio and other features of the planform are often used to predict the aerodynamic efficiency of a wing because the lift-to-drag ratio increases with aspect ratio, improving the fuel economy in powered airplanes and the gliding angle of sailplanes. Definition The aspect ratio \text is the ratio of the square of the wingspan b to the projected wing area S, which is equal to the ratio of the wingspan b to the standard mean chord \text: \text \equiv \frac = \frac Mechanism As a useful simplification, an airplane in flight can be imagined to affect a circular cylinder of air with a diameter equal to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abrial A-12 Bagoas
__NOTOC__ The A-12 was an unusual tailless glider designed by Georges Abrial in the early 1930s. It was not a success and was abandoned in 1932. Design The Abrial A-12 was unusual in having a very low aspect ratio wing, even by the standards of its time. Other tailless gliders of the 1920s, notably the Lippisch Storch series had aspect ratios of about 8, compared with the 4.75 of the Abrial. Further, where the Storchs had swept wings the Abrial's was rectangular in plan. After encouraging tests of models in the wind tunnel at St Cyr, Abrial built a full-sized version. The Abrial's wings had the designer's own reflexed camber aerofoil. Such aerofoils are useful for tailless aircraft, because the pitching moment about the aerodynamic centre of the wing can be zero. The wings were mounted with strong dihedral and braced from above by a V-strut on each side, their apexes meeting at a faired triangular central support structure. It had control surfaces on the wings which may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piston Engine
A reciprocating engine, also often known as a piston engine, is typically a heat engine that uses one or more reciprocating pistons to convert high temperature and high pressure into a 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 (SI) engine, where the spark plug initiates the combustion; or a compression-ignition (CI) engine, where the air within the cylinder is compressed, thus heating it, so that the heated air ignites fuel that is injected then or earlier.''Thermodynamics: An Engineering Approach'' by Yunus A. Cengal and Michael A. Boles Common features in all types There may be one or more pistons. Each piston is inside a cylinder, into which a gas is intro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abrial A-3 Oricou
The A-3 ''Oricou'' ( French for ''African vulture'') was a small French touring airplane designed in 1927 by Georges Abrial. It could seat two, and was powered by a 30 kW (40 hp) piston engine A reciprocating engine, also often known as a piston engine, is typically a heat engine that uses one or more reciprocating pistons to convert high temperature and high pressure into a rotating motion. This article describes the common featu .... Specifications (A-3 Oricou) See also Single-engined tractor aircraft 1920s French civil utility aircraft Oricou {{Aero-1920s-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abrial A-2 Vautour
The A-2 ''Vautour'' (''Vulture'') was a single-seat French glider that was designed by Georges Abrial. It performed well at the Vauville competition of 1925. Design The Vautour was designed by Georges Abrial of the ''Institut Aérotechnique de Saint-Cyr'' and built by Louis Peyret. Each wing, joined to a centre-section on top of the fuselage with light dihedral, had a rectangular plan apart from an angled tip and carried a broad chord aileron which filled about 60% of the span. They were of mixed construction with two rectangular section dural spars and plywood ribs. Each wing was braced with a pair of parallel struts, dural tubes enclosed in streamlined, wooden fairings, between the lower fuselage longerons and the wing spars just inside the ailerons. Its fuselage was rectangular in section, with spruce longerons and laminated wood frames. The sides were everywhere vertical but ahead of the wing it narrowed in plan and decreased in depth to a rounded nose. The downward s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
