|
Wing Flutter
Aeroelasticity is the branch of physics and engineering studying the interactions between the inertial, elastic, and aerodynamic forces occurring while an elastic body is exposed to a fluid flow. The study of aeroelasticity may be broadly classified into two fields: ''static aeroelasticity'' dealing with the static or steady state response of an elastic body to a fluid flow; and ''dynamic aeroelasticity'' dealing with the body's dynamic (typically vibrational) response. Aircraft are prone to aeroelastic effects because they need to be lightweight and withstand large aerodynamic loads. Aircraft are designed to avoid the following aeroelastic problems: # divergence where the aerodynamic forces increase the angle of attack of a wing which further increases the force; # control reversal where control activation produces an opposite aerodynamic moment that reduces, or in extreme cases, reverses the control effectiveness; and # flutter which is the uncontained vibration that can lead ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nasa Electra Testing
The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding the National Advisory Committee for Aeronautics (NACA), to give the U.S. space development effort a distinctly civilian orientation, emphasizing peaceful applications in space science. NASA has since led most American space exploration, including Project Mercury, Project Gemini, the 1968-1972 Apollo Moon landing missions, the Skylab space station, and the Space Shuttle. NASA supports the International Space Station and oversees the development of the Orion spacecraft and the Space Launch System for the crewed lunar Artemis program, Commercial Crew spacecraft, and the planned Lunar Gateway space station. The agency is also responsible for the Launch Services Program, which provides oversight of launch operations and countdown management ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederick W
Frederick may refer to: People * Frederick (given name), the name Nobility Anhalt-Harzgerode *Frederick, Prince of Anhalt-Harzgerode (1613–1670) Austria * Frederick I, Duke of Austria (Babenberg), Duke of Austria from 1195 to 1198 * Frederick II, Duke of Austria (1219–1246), last Duke of Austria from the Babenberg dynasty * Frederick the Fair (Frederick I of Austria (Habsburg), 1286–1330), Duke of Austria and King of the Romans Baden * Frederick I, Grand Duke of Baden (1826–1907), Grand Duke of Baden * Frederick II, Grand Duke of Baden (1857–1928), Grand Duke of Baden Bohemia * Frederick, Duke of Bohemia (died 1189), Duke of Olomouc and Bohemia Britain * Frederick, Prince of Wales (1707–1751), eldest son of King George II of Great Britain Brandenburg/Prussia * Frederick I, Elector of Brandenburg (1371–1440), also known as Frederick VI, Burgrave of Nuremberg * Frederick II, Elector of Brandenburg (1413–1470), Margrave of Brandenburg * Frederick William, Elector ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Textbook
A textbook is a book containing a comprehensive compilation of content in a branch of study with the intention of explaining it. Textbooks are produced to meet the needs of educators, usually at educational institutions. Schoolbooks are textbooks and other books used in schools. Today, many textbooks are published in both print and digital formats. History The history of textbooks dates back to ancient civilizations. For example, Ancient Greeks wrote educational texts. The modern textbook has its roots in the mass production made possible by the printing press. Johannes Gutenberg himself may have printed editions of ''Ars Minor'', a schoolbook on Latin grammar by Aelius Donatus. Early textbooks were used by tutors and teachers (e.g. alphabet books), as well as by individuals who taught themselves. The Greek philosopher Socrates lamented the loss of knowledge because the media of transmission were changing. Before the invention of the Greek alphabet 2,500 years ago, knowledge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernest Edwin Sechler
Ernest Edwin Sechler (1905-1979) was an aerospace engineer and scientist who specialized in thin-shell structures. He earned his doctorate in 1934 at Caltech as one of the early students of Theodore von Kármán with a dissertation on the mechanics of thin-plate compression. Hans W. Liepmann (1984Ernest Edwin Sechler in ''Memorial Tributes: National Academy of Engineering'', Vol. 2, 258-261, link from National Academies Press Sechler contributed to the transition from wood to metal for construction of airframes. :A graduate student named Ernest E. Sechler (now a professor of aeronautics at Caltech) was reviewing research in the strength of thin metal plates which had been carried out by the National Bureau of Standards. Sechler reported that the engineers didn’t think that sheet metal could be used to make structural elements in an airplane because the metal would give way...Sechler’s report intrigued me. Von Kármán showed that by stiffening with re-enforcing strips the "effe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodore Von Kármán
Theodore von Kármán ( hu, ( szőllőskislaki) Kármán Tódor ; born Tivadar Mihály Kármán; 11 May 18816 May 1963) was a Hungarian-American mathematician, aerospace engineer, and physicist who was active primarily in the fields of aeronautics and astronautics. He was responsible for many key advances in aerodynamics, notably on supersonic and hypersonic airflow characterization. He is regarded as an outstanding aerodynamic theoretician of the 20th century. Early life Theodore von Kármán was born into a Jewish family in Budapest, Austria-Hungary, as Kármán Tódor, the son of Helen (Kohn, hu, Kohn Ilka) and Mór Kármán. One of his ancestors was Rabbi Judah Loew ben Bezalel. He studied engineering at the city's Royal Joseph Technical University, known today as Budapest University of Technology and Economics. After graduating in 1902 he moved to the German Empire and joined Ludwig Prandtl at the University of Göttingen, where he received his doctorate in 1908. He taug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caltech
The California Institute of Technology (branded as Caltech or CIT)The university itself only spells its short form as "Caltech"; the institution considers other spellings such a"Cal Tech" and "CalTech" incorrect. The institute is also occasionally referred to as "CIT", most notably in its alma mater, but this is uncommon. is a private university, private research university in Pasadena, California. Caltech is ranked among the best and most selective academic institutions in the world, and with an enrollment of approximately 2400 students (acceptance rate of only 5.7%), it is one of the world's most selective universities. The university is known for its strength in science and engineering, and is among a small group of Institute of Technology (United States), institutes of technology in the United States which is primarily devoted to the instruction of pure and applied sciences. The institution was founded as a preparatory and vocational school by Amos G. Throop in 1891 and began ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aeronautical Engineering
Aerospace engineering is the primary field of engineering concerned with the development of aircraft and spacecraft. It has two major and overlapping branches: Aeronautics, aeronautical engineering and Astronautics, astronautical engineering. Avionics engineering is similar, but deals with the electronic engineering, electronics side of aerospace engineering. "Aeronautical engineering" was the original term for the field. As flight technology advanced to include vehicles operating in outer space, the broader term "aerospace engineering" has come into use. Aerospace engineering, particularly the astronautics branch, is often colloquially referred to as "rocket science". Overview Flight vehicles are subjected to demanding conditions such as those caused by changes in atmospheric pressure and temperature, with structural loads applied upon vehicle components. Consequently, they are usually the products of various technological and engineering disciplines including aerodynamics, A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Farnborough, Hampshire
Farnborough is a town in northeast Hampshire, England, part of the borough of Rushmoor and the Farnborough/Aldershot Built-up Area. Farnborough was founded in Anglo-Saxons, Saxon times and is mentioned in the Domesday Book of 1086. The name is formed from ''Ferneberga'' which means "fern hill". According to the UK-wide 2011 Census, the population of Farnborough is 57,486. The town is probably best known for its association with aviation, with the Farnborough Airshow, Farnborough Airport, Royal Aircraft Establishment, and the Air Accidents Investigation Branch. History Farnborough is mentioned in the Domesday Book as part of the settlement of Crondall. Over the centuries, it was known as ''Ferneberga'' (11th century); ''Farnburghe'', ''Farenberg'' (13th century); ''Farnborowe'', ''Fremborough'', and ''Farneborough'' (16th century). Tower Hill Tower Hill, Cove: There is substantial evidence that many years ago a large accumulation of Sarsen stones existed upon what later came t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Aircraft Establishment
The Royal Aircraft Establishment (RAE) was a British research establishment, known by several different names during its history, that eventually came under the aegis of the Ministry of Defence (United Kingdom), UK Ministry of Defence (MoD), before finally losing its identity in mergers with other institutions. The first site was at Farnborough Airfield ("RAE Farnborough") in Hampshire to which was added a second site RAE Bedford (Bedfordshire) in 1946. In 1988 it was renamed the Royal Aerospace Establishment (RAE) before merging with other research entities to become part of the new Defence Research Agency in 1991. History In 1904–1906 the Army Balloon Factory, which was part of the Army School of Ballooning, under the command of Colonel James Templer (balloon aviator), James Templer, relocated from Aldershot to the edge of Farnborough Common in order to have enough space to inflate the new "dirigible balloon" or airship which was then under construction.Walker, P; Early Avi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Pugsley
Sir Alfred Grenville Pugsley, FRS (13 May 1903 – 9 March 1998) was a British structural engineer. He was born in Wimbledon and studied engineering at Battersea Polytechnic, followed by working as a civil engineering student at Woolwich Arsenal. In 1926 he moved to work in R&D at the Royal Airship Works at Cardington, Bedfordshire, where he was involved in the development of the R101 airship. In 1931 he transferred to the Royal Aircraft Establishment (RAE) at Farnborough, where he was concerned with the behaviour of aircraft wings. In 1941 he was made head of the structural and mechanical engineering department at RAE and awarded an OBE in 1944. After the Second World War he was appointed Professor of Civil Engineering at the University of Bristol becoming Emeritus Professor in 1968. During this time he developed the concepts of safety in engineering, becoming an authority on metal fatigue in aircraft and the safe design of suspension bridges. He was elected a Fellow of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roxbee Cox, Baron Kings Norton
Harold Roxbee Cox, Baron Kings Norton (6 June 1902 – 21 December 1997) was a British aeronautical engineer. He was notable for his contributions to British industry, particularly aeronautical engineering, and for his part in the establishment of Cranfield University. Life Cox was the son of jeweller William John Roxbee Cox, of Handsworth, Staffordshire, and Amelia (''née'' Stern). The statistician David Cox is a distant cousin. Born Harold Roxbee Cox, he was known as 'Roxbee' to his friends. As a child, his father took him to early air shows and air races, and his imagination was fuelled by pilots of the time such as Claude Grahame-White, B. C. Hucks and Gustav Hamel, beginning a lifelong fascination with aircraft. Cox left Kings Norton Grammar School (now King's Norton Boys' School) at the age of 16 and joined the Aircraft Design Department of the Austin Motor Company at Longbridge, which was at that time, designing and building light aircraft such as the Whippet and Kest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Reissner
Hans Jacob Reissner, also known as Jacob Johannes Reissner (18 January 1874, Berlin – 2 October 1967, Mt. Angel, Oregon), was a German aeronautical engineer whose avocation was mathematical physics. During World War I he was awarded the Iron Cross second class (for civilians) for his pioneering work on aircraft design. Biography Reissner was born into a wealthy Berlin family that benefited from an inheritance from his great-uncle on his mother's side. As a young engineering graduate, he spent a year in the U.S. working as a draftsman. After this year, he broadened his academic interests to include physics. As a young academic, he published mathematical papers on engineering problems. Before the first World War, Reissner designed the first successful all-metal aircraft, the Reissner Canard (or Ente) with both skin and structure made of metal. This was constructed with assistance from Hugo Junkers who had previously shown little interest in aviation. Both were professors at th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Caltech")
