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81 Svaty, Vladimir
SUBJECT AREA: Textiles[br]fl. 1950 Czechoslovakia[br]Czech inventor of a loom across which the weft was projected by a jet of water.[br]Since the 1930s people have been experimenting with ways of inserting the weft during weaving without using a massive shuttle. This would save wasting the energy that a shuttle requires to accelerate it through the warp and which is only to be lost when the shuttle is stopped in its box. Around 1950, the Czech engineer Vladimir Svaty had been working on air-jet looms, in which the weft was wafted across the loom by a jet of air. He then switched his interest to waterjet looms, and in 1955, at the Brussels exhibition, the first water-jet loom was displayed to a surprised world. In 1959 the Czechs had installed 150 of these looms at Semily in Czechoslovakia, weaving cloth 41 in. (104 cm) wide at 350 picks per minute. Water-jet looms are suitable only for certain types of synthetic fibres which are not affected by the wet. They are compact, quiet, mechanically simple and free from weft vibration. They find their most appropriate use in weaving simple fabrics from water-insensitive, continuous-filament yarn, which they can produce economically and with the highest quality.[br]Further ReadingJ.J.Vincent, 1980, Shuttleless Looms, Manchester (written with inside knowledge of the problems; the author tried to develop a shuttleless loom himself).RLH -
82 Vauban, Sébastien de
[br]b. 15 May 1633 St-Léger-de-Fougeret, Château Chinon, Nièvre, Franced. 20 March 1707 Paris, France[br]French civil and military engineer.[br]Born of impecunious parents, Vauban joined Condé's regiment as a cadet in 1651, at the age of 17, although he had apparently acquired some knowledge of mathematics and fortifications in the Carmelite College of Semur-en-Auxois. In the war of the Fronde he was captured by the Royal troops in 1653 and was converted to the king's service. He was soon recognized as having engineering ability and was given the task of repairing the fortifications of Sainte-Menehould. During the next few years he was engaged on fortification repairs and assisting at sieges, including Ypres, Gravelines and Oudenarde in 1658. Vauban found favour with the king, Louis XIV, and was responsible for the fortifications of Lille, which had been captured in 1667; he commenced the defensive structures of the citadel and the town in 1668. These were completed in 1674 and consisted of a vast pentagonal fort with bastions and further detached works surrounded by water defences. In 1692 he was present at the siege of Namur and was responsible for its capture. He was then put in charge of re-establishing and improving the defences. He next developed a line of fortresses along the French border. He later was abandoned by the king, whom he had served so well, and, with his advice being ignored by the French forces, they suffered defeat after defeat in Marlborough's wars.Meanwhile he had been called in to inspect the recently completed Canal du Midi and subsequently made recommendations for its improvement. These included the extension of the Montagne Noire feeder, and the construction of the Cesse and Orbiel aqueducts which were carried out to his design and under his supervision in 1686–7. In 1700 he was consulted on and produced a plan for a canal across France from north to south, providing a barge waterway from Nîmes to Dunkirk, but this was not carried out.In 1703 he was created maréchal de France, and two years later he devised vast schemes for the development of the canal system in Flanders. Owing to determined opposition from the local people, these schemes were abandoned and not revived until 1770, by which time the locals were prepared to accept them.[br]Further ReadingSir Reginald Blomfield, 1938, Sébastien lePrestre de Vauban, 1633–1707, Methuen. D.Halevy, 1924, Vauban. Builder of Fortresses, trans. C.J.C.Street, Geoffrey Bles.JHB -
83 Whittle, Sir Frank
SUBJECT AREA: Aerospace[br]b. 1 June 1907 Coventry, England[br]English engineer who developed the first British jet engine.[br]Frank Whittle enlisted in the Royal Air Force (RAF) as an apprentice, and after qualifying as a pilot he developed an interest in the technical aspects of aircraft propulsion. He was convinced that the gas-turbine engine could be adapted for use in aircraft, but he could not convince the Air Ministry, who turned down the proposal. Nevertheless, Whittle applied for a patent for his turbojet engine the following year, 1930. While still in the RAF, he was allowed time to study for a degree at Cambridge University and carry out postgraduate research (1934–7). By 1936 the official attitude had changed, and a company called Power Jets Ltd was set up to develop Whittle's jet engine. On 12 April 1937 the experimental engine was bench-tested. After further development, an official order was placed in March 1938. Whittle's engine had a centrifugal compressor, ten combustion chambers and a turbine to drive the compressor; all the power output came from the jet of hot gases.In 1939 an experimental aircraft was ordered from the Gloster Aircraft Company, the E 28/39, to house the Whittle W1 engine, and this made its first flight on 15 May 1941. A development of the W1 by Rolls-Royce, the Welland, was used to power the twin-engined Gloster Meteor fighter, which saw service with the RAF in 1944. Whittle retired from the RAF in 1948 and became a consultant. From 1977 he lived in the United States. Comparisons between the work of Whittle and Hans von Ohain show that each of the two engineers developed his engine without knowledge of the other's work. Whittle was the first to take out a patent, Ohain achieved the first flight; the Whittle engine and its derivatives, however, played a much greater role in the history of the jet engine.[br]Principal Honours and DistinctionsKnighted 1948. Commander of the Order of the Bath 1947. Order of Merit 1986. FRS 1947. Honorary Fellow of the Royal Aeronautical Society.Bibliography1953, Jet, London (an account not only of his technical problems, but also of the difficulties with civil servants, politicians and commercial organizations).Further ReadingJ.Golley, 1987, Whittle: The True Story, Shrewsbury (this author based his work on Jet, but carried out research, aided by Whittle, to give a fuller account with the benefit of hindsight).JDS -
84 أساسي
أَسَاسِيّ \ basic: very necessary or important; forming a starting point on which to develop: I have only a basic knowledge of science. Experience in foreign countries is basic for this kind of job. chief: most important; main: Our chief crop is corn. essential: belonging especially to sth. and showing its real nature: Kindness was an essential part of his character. indispensable: adj. very necessary; what one must have for a certain purpose: A sharp knife is indispensable for cutting meat. key: important, so that others depend on it: The ship’s engineer holds a key position. main: chief; most important: my main reasons; a main road. material: important; necessary: We must make a material change in our plans. radical: concerning the most important parts of anything; (of change) complete; (of people) in favour of complete political change: radical changes in the laws of a country; radical improvements; radical opinions. vital: very important; necessary to life: It was a vital decision. The heart is a vital organ. \ See Also هامّ جدًّا، رئيسي (رئيسيّ)، جوهري (جَوْهَرِيّ)، لا غنى عنه (لا غِنًى عنه) -
85 محنك
مُحَنَّك \ experienced: having had a lot of practice: He’s an experienced engineer. level-headed: sensible; showing good judgement, even in trouble or in danger: He’s level-headed, and has never had an accident while driving his car. sophisticated: not simple and natural but seeming experienced and wise; pretending or showing a knowledge of glamorous city culture: a sophisticated actress. veteran: an old soldier who has fought in many battles; sb. with long experience in some sport or skill. -
86 basic
أَسَاسِيّ \ basic: very necessary or important; forming a starting point on which to develop: I have only a basic knowledge of science. Experience in foreign countries is basic for this kind of job. chief: most important; main: Our chief crop is corn. essential: belonging especially to sth. and showing its real nature: Kindness was an essential part of his character. indispensable: adj. very necessary; what one must have for a certain purpose: A sharp knife is indispensable for cutting meat. key: important, so that others depend on it: The ship’s engineer holds a key position. main: chief; most important: my main reasons; a main road. material: important; necessary: We must make a material change in our plans. radical: concerning the most important parts of anything; (of change) complete; (of people) in favour of complete political change: radical changes in the laws of a country; radical improvements; radical opinions. vital: very important; necessary to life: It was a vital decision. The heart is a vital organ. \ See Also هامّ جدًّا، رئيسي (رئيسيّ)، جوهري (جَوْهَرِيّ)، لا غنى عنه (لا غِنًى عنه) -
87 chief
أَسَاسِيّ \ basic: very necessary or important; forming a starting point on which to develop: I have only a basic knowledge of science. Experience in foreign countries is basic for this kind of job. chief: most important; main: Our chief crop is corn. essential: belonging especially to sth. and showing its real nature: Kindness was an essential part of his character. indispensable: adj. very necessary; what one must have for a certain purpose: A sharp knife is indispensable for cutting meat. key: important, so that others depend on it: The ship’s engineer holds a key position. main: chief; most important: my main reasons; a main road. material: important; necessary: We must make a material change in our plans. radical: concerning the most important parts of anything; (of change) complete; (of people) in favour of complete political change: radical changes in the laws of a country; radical improvements; radical opinions. vital: very important; necessary to life: It was a vital decision. The heart is a vital organ. \ See Also هامّ جدًّا، رئيسي (رئيسيّ)، جوهري (جَوْهَرِيّ)، لا غنى عنه (لا غِنًى عنه) -
88 essential
أَسَاسِيّ \ basic: very necessary or important; forming a starting point on which to develop: I have only a basic knowledge of science. Experience in foreign countries is basic for this kind of job. chief: most important; main: Our chief crop is corn. essential: belonging especially to sth. and showing its real nature: Kindness was an essential part of his character. indispensable: adj. very necessary; what one must have for a certain purpose: A sharp knife is indispensable for cutting meat. key: important, so that others depend on it: The ship’s engineer holds a key position. main: chief; most important: my main reasons; a main road. material: important; necessary: We must make a material change in our plans. radical: concerning the most important parts of anything; (of change) complete; (of people) in favour of complete political change: radical changes in the laws of a country; radical improvements; radical opinions. vital: very important; necessary to life: It was a vital decision. The heart is a vital organ. \ See Also هامّ جدًّا، رئيسي (رئيسيّ)، جوهري (جَوْهَرِيّ)، لا غنى عنه (لا غِنًى عنه) -
89 indispensable
أَسَاسِيّ \ basic: very necessary or important; forming a starting point on which to develop: I have only a basic knowledge of science. Experience in foreign countries is basic for this kind of job. chief: most important; main: Our chief crop is corn. essential: belonging especially to sth. and showing its real nature: Kindness was an essential part of his character. indispensable: adj. very necessary; what one must have for a certain purpose: A sharp knife is indispensable for cutting meat. key: important, so that others depend on it: The ship’s engineer holds a key position. main: chief; most important: my main reasons; a main road. material: important; necessary: We must make a material change in our plans. radical: concerning the most important parts of anything; (of change) complete; (of people) in favour of complete political change: radical changes in the laws of a country; radical improvements; radical opinions. vital: very important; necessary to life: It was a vital decision. The heart is a vital organ. \ See Also هامّ جدًّا، رئيسي (رئيسيّ)، جوهري (جَوْهَرِيّ)، لا غنى عنه (لا غِنًى عنه) -
90 key
أَسَاسِيّ \ basic: very necessary or important; forming a starting point on which to develop: I have only a basic knowledge of science. Experience in foreign countries is basic for this kind of job. chief: most important; main: Our chief crop is corn. essential: belonging especially to sth. and showing its real nature: Kindness was an essential part of his character. indispensable: adj. very necessary; what one must have for a certain purpose: A sharp knife is indispensable for cutting meat. key: important, so that others depend on it: The ship’s engineer holds a key position. main: chief; most important: my main reasons; a main road. material: important; necessary: We must make a material change in our plans. radical: concerning the most important parts of anything; (of change) complete; (of people) in favour of complete political change: radical changes in the laws of a country; radical improvements; radical opinions. vital: very important; necessary to life: It was a vital decision. The heart is a vital organ. \ See Also هامّ جدًّا، رئيسي (رئيسيّ)، جوهري (جَوْهَرِيّ)، لا غنى عنه (لا غِنًى عنه) -
91 main
أَسَاسِيّ \ basic: very necessary or important; forming a starting point on which to develop: I have only a basic knowledge of science. Experience in foreign countries is basic for this kind of job. chief: most important; main: Our chief crop is corn. essential: belonging especially to sth. and showing its real nature: Kindness was an essential part of his character. indispensable: adj. very necessary; what one must have for a certain purpose: A sharp knife is indispensable for cutting meat. key: important, so that others depend on it: The ship’s engineer holds a key position. main: chief; most important: my main reasons; a main road. material: important; necessary: We must make a material change in our plans. radical: concerning the most important parts of anything; (of change) complete; (of people) in favour of complete political change: radical changes in the laws of a country; radical improvements; radical opinions. vital: very important; necessary to life: It was a vital decision. The heart is a vital organ. \ See Also هامّ جدًّا، رئيسي (رئيسيّ)، جوهري (جَوْهَرِيّ)، لا غنى عنه (لا غِنًى عنه) -
92 material
أَسَاسِيّ \ basic: very necessary or important; forming a starting point on which to develop: I have only a basic knowledge of science. Experience in foreign countries is basic for this kind of job. chief: most important; main: Our chief crop is corn. essential: belonging especially to sth. and showing its real nature: Kindness was an essential part of his character. indispensable: adj. very necessary; what one must have for a certain purpose: A sharp knife is indispensable for cutting meat. key: important, so that others depend on it: The ship’s engineer holds a key position. main: chief; most important: my main reasons; a main road. material: important; necessary: We must make a material change in our plans. radical: concerning the most important parts of anything; (of change) complete; (of people) in favour of complete political change: radical changes in the laws of a country; radical improvements; radical opinions. vital: very important; necessary to life: It was a vital decision. The heart is a vital organ. \ See Also هامّ جدًّا، رئيسي (رئيسيّ)، جوهري (جَوْهَرِيّ)، لا غنى عنه (لا غِنًى عنه) -
93 radical
أَسَاسِيّ \ basic: very necessary or important; forming a starting point on which to develop: I have only a basic knowledge of science. Experience in foreign countries is basic for this kind of job. chief: most important; main: Our chief crop is corn. essential: belonging especially to sth. and showing its real nature: Kindness was an essential part of his character. indispensable: adj. very necessary; what one must have for a certain purpose: A sharp knife is indispensable for cutting meat. key: important, so that others depend on it: The ship’s engineer holds a key position. main: chief; most important: my main reasons; a main road. material: important; necessary: We must make a material change in our plans. radical: concerning the most important parts of anything; (of change) complete; (of people) in favour of complete political change: radical changes in the laws of a country; radical improvements; radical opinions. vital: very important; necessary to life: It was a vital decision. The heart is a vital organ. \ See Also هامّ جدًّا، رئيسي (رئيسيّ)، جوهري (جَوْهَرِيّ)، لا غنى عنه (لا غِنًى عنه) -
94 vital
أَسَاسِيّ \ basic: very necessary or important; forming a starting point on which to develop: I have only a basic knowledge of science. Experience in foreign countries is basic for this kind of job. chief: most important; main: Our chief crop is corn. essential: belonging especially to sth. and showing its real nature: Kindness was an essential part of his character. indispensable: adj. very necessary; what one must have for a certain purpose: A sharp knife is indispensable for cutting meat. key: important, so that others depend on it: The ship’s engineer holds a key position. main: chief; most important: my main reasons; a main road. material: important; necessary: We must make a material change in our plans. radical: concerning the most important parts of anything; (of change) complete; (of people) in favour of complete political change: radical changes in the laws of a country; radical improvements; radical opinions. vital: very important; necessary to life: It was a vital decision. The heart is a vital organ. \ See Also هامّ جدًّا، رئيسي (رئيسيّ)، جوهري (جَوْهَرِيّ)، لا غنى عنه (لا غِنًى عنه) -
95 experienced
مُحَنَّك \ experienced: having had a lot of practice: He’s an experienced engineer. level-headed: sensible; showing good judgement, even in trouble or in danger: He’s level-headed, and has never had an accident while driving his car. sophisticated: not simple and natural but seeming experienced and wise; pretending or showing a knowledge of glamorous city culture: a sophisticated actress. veteran: an old soldier who has fought in many battles; sb. with long experience in some sport or skill. -
96 level-headed
مُحَنَّك \ experienced: having had a lot of practice: He’s an experienced engineer. level-headed: sensible; showing good judgement, even in trouble or in danger: He’s level-headed, and has never had an accident while driving his car. sophisticated: not simple and natural but seeming experienced and wise; pretending or showing a knowledge of glamorous city culture: a sophisticated actress. veteran: an old soldier who has fought in many battles; sb. with long experience in some sport or skill. -
97 sophisticated
مُحَنَّك \ experienced: having had a lot of practice: He’s an experienced engineer. level-headed: sensible; showing good judgement, even in trouble or in danger: He’s level-headed, and has never had an accident while driving his car. sophisticated: not simple and natural but seeming experienced and wise; pretending or showing a knowledge of glamorous city culture: a sophisticated actress. veteran: an old soldier who has fought in many battles; sb. with long experience in some sport or skill. -
98 veteran
مُحَنَّك \ experienced: having had a lot of practice: He’s an experienced engineer. level-headed: sensible; showing good judgement, even in trouble or in danger: He’s level-headed, and has never had an accident while driving his car. sophisticated: not simple and natural but seeming experienced and wise; pretending or showing a knowledge of glamorous city culture: a sophisticated actress. veteran: an old soldier who has fought in many battles; sb. with long experience in some sport or skill.
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