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1 variable geometry wing aircraft
VGWA, variable geometry wing aircraftEnglish-Russian dictionary of planing, cross-planing and slotting machines > variable geometry wing aircraft
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2 variable geometry wing aircraft
Военный термин: самолёт с крылом изменяемой геометрииУниверсальный англо-русский словарь > variable geometry wing aircraft
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3 variable-geometry wing aircraft
Военный термин: самолёт с изменяемой геометрией крылаУниверсальный англо-русский словарь > variable-geometry wing aircraft
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4 variable-geometry wing aircraft
English-Russian military dictionary > variable-geometry wing aircraft
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5 aircraft
летательный аппарат, ЛА; самолет(ы); вертолет(ы); авиация; авиационный; бортовой ( об оборудовании ЛА)C2 aircraft — воздушный КП, ВКП; ЛА для оперативного управления
electronic surveillance, reconnaissance and warning aircraft — самолет РЭР, наблюдения и оповещения
short takeoff, vertical landing aircraft — самолет укороченного взлета и вертикальной посадки
— high-penetration attack aircraft— shadowing aircraft— spotting aircraft— tiltable-wing aircraft -
6 wing
wing nкрылоwinged vс крыльямиair transport wingавиатранспортное подразделениеall-moving wingуправляемое крылоanhedral wingкрыло с отрицательным углом поперечного ВЭarrow-type wingстреловидное крылоaugmentor wingкрыло с управляемой циркуляциейbackswept boundary layer controlled wingкрыло с управляемым пограничным слоемbraced wingрасчаленное крылоcantilever wingсвободнонесущее крылоcenter wingцентропланcenter wing sectionцентроплан крылаclean wingаэродинамическое чистое крылоcontinuous wing beamнеразрезной лонжерон крылаcrescent wingсерповидное крылоdelta wingтреугольное крылоdesign wing areaрасчетная площадь крылаdetach the wingотстыковывать крылоdihedral wingкрыло с положительным углом поперечного ВЭelliptical wingэллиптическое крылоfixed wingнеподвижное крылоflow about wingобтекание крылаfolding wingскладывающееся крылоfolding wing aircraftвоздушное судно со складывающимся крыломforward-swept wingкрыло обратной стреловидностиfront wing sparпередний лонжерон крылаgross wing areaплощадь крыла, включая подфюзеляжную частьgull wingкрыло типа чайкаhigh-lift devices wingкрыло с механизацией для обеспечения большей подъемной силыhigh-lift wing devicesвысокоэффективная механизация крылаhigh wingвысокорасположенное крылоinfinite-span wingкрыло бесконечного размахаinner wingцентропланinverted-gull wingкрыло типа обратная чайкаlift wingнесущая расчалкаlow aspect wingкрыло малого удлиненияlower wingнижнее крылоlow wingнизкорасположенное крылоmiddle wing barсредний фланговый горизонтmid wingсреднерасположенное крылоmonospar wingоднолонжеронное крылоmovable wingкрыло изменяемой крылоouter wingотъемная часть крылаover the wingнад крыломpipeline to wing slatтрубопровод подвода воздуха к предкрылкуpivoting wingповоротное крылоrear wing sparзадний лонжерон крылаrectangular wingпрямоугольное крылоrigid wingжесткое крылоrocking wingsпокачивание крыльямиrotary wingнесущий винтshoulder wingвысокорасположенное крылоsingle-bay wingодностоечное крылоsingle-spar wingоднолонжеронное крылоslotted wingщелевое крылоsteady airflow about the wingустановившееся обтекание крыла воздушным потокомstressed-skin wingкрыло с работающей обшивкойsweptback wingкрыло прямой стреловидностиsweptforward wingкрыло обратной стреловидностиswept wingстреловидное крылоtapered wingтрапециевидное крылоtorsion box wingкрыло кессонной конструкцииtwo-spar wingдвухлонжеронное крылоupper wingверхнее крылоupwind wing barдальний фланговый горизонтvariable-area wingкрыло с изменяемой площадьюvariable-geometry wingкрыло изменяемой геометрииvariable-incidence wingкрыло с изменяемым углом установкиvariable-sweep wingкрыло переменной стреловидностиvariable-swept wingкрыло изменяемой стреловидностиwing aeroelasticityаэроупругость крылаwing anti-icing systemпротивообледенительная система крылаwing areaплощадь крылаwing aspect ratioотносительное удлинение крылаwing attachment fittingузел крепления крылаwing barфланговый горизонтwing bar lightsогни световых горизонтовwing base lineбазовая линия крылаwing bearing capacityнесущая способность крылаwing bending momentизгибающий момент крылаwing bending reliefразгрузка крылаwing boxотсек кессона крылаwing box panelпанель кессона крылаwing bucklingпродольный изгиб крылаwing buttingстыковка крылаwing butting wrenchключ для стыковки крылаwing chordхорда крылаwing chord lineлиния хорды крылаwing clearance lightгабаритный огонь крылаwing coveringобшивка крылаwing cradleложемент под крылоwing curvatureкривизна крылаwing devicesмеханизация крылаwing divergenceдивергенция крылаwing dogtooth extensionнаплыв крылаwing dragлобовое сопротивление крылаwing dropзавал на крылоwing droppingзавал на крылоwing engineкрыльевой двигательwing extendable devicesвыдвижная механизация крылаwing fenceаэродинамический гребень на крылеwing filletзализ крылаwing flapзакрылокwing flap control systemсистема управления закрылкамиwing flaps error transmitterдатчик рассогласования закрылковwing fuel tankтопливный крыльевой бакwing geometric twistгеометрическая крутка крылаwing heavinessтенденция сваливания на крылоwing horseкрыльевой ложементwing icing conditionsусловия обледенения крылаwing integral fuel tankтопливный отсек крылаwing jackподъемник крылаwing jacking pointгнездо под крыльевой подъемникwing jointразъем крылаwing leading edgeносок крылаwing liftподъемная сила крылаwing loadнагрузка на крылоwing longitudinal oscillationпродольное колебание крылаwing lower surfaceнижняя поверхность крылаwing manholeлюк в крылеwing outer panels jointстык консолей крылаwing planformформа крыла в планеwing polarполяра крылаwing pressure plottingраспределение давления по крылуwing ribкрыльевая нервюраwing rootкорневая часть крылаwing screw jackвинтовой подъемник крылаwing sectionпрофиль крылаwing settingустановка угла положения крылаwing setting angleугол заклинения крылаwing shapeпрофиль крылаwing skeletonостов крылаwing slideскольжение на крылоwing slotщель крыла(для обдува) wing slot doorстворка щели крылаwing spanразмах крылаwing sparлонжерон крылаwing spar capпояс лонжерона крылаwing split lineлиния разъема крылаwing spoiler systemсистема крыльевых интерцепторwing stall sensorдатчик критических углов атаки крылаwing static dischargerстатический разрядник крылаwing sweep angleугол стреловидности крылаwing tail filletхвостовой зализ крылаwing taperсужение крылаwing taper ratioотносительное сужение крылаwing tipзаконцовка крылаwing tip clearanceзапас высоты законцовки крылаwing tip clearance lineлиния ограничения безопасного расстояния до конца крылаwing torsional momentкрутящий момент крылаwing torsional stiffnessжесткость крыла на кручениеwing torsion stiffnessжесткость крыла на кручениеwing trestleподкрыльевой козелокwing trim stripбалансировочный нож на задней кромке крылаwing twistкрутка крылаwing upper surfaceверхняя поверхность крылаwing variable sweepизменяемая стреловидность крылаwing walkerсопровождающий у конца крылаwing walk matмат на крылоwing walkwayкрыльевой мат -
7 aircraft
воздушное судно [суда], атмосферный летательный аппарат [аппараты]; самолёт (ы) ; вертолёты); авиация; авиационный; см. тж. airplane, boostaircraft in the barrier — самолёт, задержанный аварийной (аэродромной) тормозной установкой
aircraft off the line — новый [только что построенный] ЛА
B through F aircraft — самолёты модификаций B, C, D, E и F
carrier(-based, -borne) aircraft — палубный ЛА; авианосная авиация
conventional takeoff and landing aircraft — самолёт с обычными взлетом и посадкой (в отличие от укороченного или вертикального)
keep the aircraft (headed) straight — выдерживать направление полёта ЛА (при выполнении маневра); сохранять прямолинейный полет ЛА
keep the aircraft stalled — сохранять режим срыва [сваливания] самолёта, оставлять самолёт в режиме срыва [сваливания]
nearly wing borne aircraft — верт. ЛА в конце режима перехода к горизонтальному полёту
pull the aircraft off the deck — разг. отрывать ЛА от земли (при взлете)
put the aircraft nose-up — переводить [вводить] ЛА на кабрирование [в режим кабрирования]
put the aircraft through its paces — определять предельные возможности ЛА, «выжимать все из ЛА»
reduced takeoff and landing aircraft — самолёт укороченного взлета и посадки (с укороченным разбегом и пробегом)
rocket(-powered, -propelled) aircraft — ракетный ЛА, ЛА с ракетным двигателем
roll the aircraft into a bank — вводить ЛА в крен, накренять ЛА
rotate the aircraft into the climb — увеличивать угол тангажа ЛА для перехода к набору высоты, переводить ЛА в набор высоты
short takeoff and landing aircraft — самолёт короткого взлета и посадки (с коротким разбегом и пробегом)
single vertical tail aircraft — ЛА с одинарным [центральным] вертикальным оперением
strategic(-mission, -purpose) aircraft — ЛА стратегического назначения; стратегический самолёт
take the aircraft throughout its entire envelope — пилотировать ЛА во всем диапазоне полётных режимов
trim the aircraft to fly hands-and-feet off — балансировать самолёт для полёта с брошенным управлением [с брошенными ручкой и педалями]
turbofan(-engined, -powered) aircraft — ЛА с турбовентиляторными двигателями, ЛА с ТРДД
turbojet(-powered, -propelled) aircraft — ЛА с ТРД
undergraduate navigator training aircraft — учебно-тренировочный самолёт для повышенной лётной подготовки штурманов
water(-based, takeoff and landing) aircraft — гидросамолёт
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8 wing
крыло; флигель; створка -
9 geometry
геометрия; геометрические параметры -
10 variable
['veərɪəbl] 1.aggettivo variabile (anche inform.)2.nome variabile f. (anche inform. mat.)* * ** * *variable /ˈvɛərɪəbl/A a.1 variabile; incostante: The quality is very variable, la qualità è molto variabile; variable winds, venti variabili; variable weather, tempo variabile; (astron.) variable star, stella variabile3 (fin.) variabile: variable budget, budget variabile; variable interest rate, tasso d'interesse variabile4 (comput.) variabileB n.2 (mat., stat.) variabile; grandezza (o quantità) variabile: random variable, variabile aleatoria (o casuale)3 (naut.) vento variabile4 (astron.) stella variabile● (fin.) variable annuity, rendita variabile □ (rag.) variable costs, costi variabili □ (aeron.) variable-geometry aircraft, aereo a geometria variabile □ (fin.) variable levy, dazio d'importazione variabile □ (ass.) variable life insurance, assicurazione sulla vita a capitale variabile □ (aeron.) variable pitch propeller, elica a passo variabile □ (fin.) variable-rate mortgage, mutuo ipotecario a tasso variabile □ (aeron.) variable-sweep wing, ala a freccia variabile □ (fin.) variable-yield securities, titoli a reddito variabilevariably avv.* * *['veərɪəbl] 1.aggettivo variabile (anche inform.)2.nome variabile f. (anche inform. mat.) -
11 VGWA
Военный термин: variable geometry wing aircraft -
12 VGWA
VGWA, variable geometry wing aircraftEnglish-Russian dictionary of planing, cross-planing and slotting machines > VGWA
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13 variant
вариант, см. тж. version -
14 configuration
1. конфигурация; схема; компоновка; форма; комбинация2. структура3. вариант <ЛА>10x8 configuration15% unstable configurationactuator configurationaero-balanced configurationaeroelastic configurationaeromedical configurationaft CG configurationair defence configurationair-combat configurationair-to-air configurationaircraft configurationaircraft-like configurationairfoil-spoiler-flap configurationairframe-inlet configurationall-cargo configurationall-economy configurationall-freight configurationall-wing configurationanti-ice configurationapproach-flap configurationarrow-wing configurationas delivered configurationas-built configurationasymmetrical missile configurationback-staggered configurationbaseline configurationbenchmark configurationblade configurationblade/hub configurationblowing configurationbroad-brush configurationbutterfly configurationcabin configurationcanard configurationcanard-tail configurationcanard-wing configurationcanard-wing-body configurationcanardless configurationcargo-loading configurationchine configurationchined configurationcircular configurationclean configurationclose-coupled canard configurationclose-coupled wing-canard configurationclosed-loop configurationcoaxial configurationcockpit configurationconstant gain configurationcontrol configurationcontrol law configurationcontrol surface configurationcontrol system configurationcritical configurationcruise configurationdelta-canard configurationdelta-winged configurationdeparture resistant configurationdeployed configurationdisplay configurationdouble-delta configurationdownstop configurationdual cargo-hook configurationdual-console configurationeconomy class configurationejector-lift and vectored-thrust configurationelectronic reconnaissance configurationempennage configurationenergy-conservative configurationengine configurationevaluation configurationfairing configurationfighter-like configurationfilter configurationfinned configurationflap configurationflapped configurationflaps-up configurationflying boom configurationforebody configurationforebody off configurationforebody removed configurationforward-swept configurationforward-swept-wing configurationfour-blade configurationfour-engine configurationfree-turbine configurationgeometric configurationglide configurationglove-fuselage configurationgo-around configurationheavy store configurationhigh-angle-of-attack configurationhigh-control-effectiveness configurationhigh-altitude configurationhigh-density configurationhigh-fineness-ratio configurationhigh-lift configurationhigh-overshoot configurationhigh-wing configurationhorizontal ellipse configurationhypersonic configurationin-flight configurationin-line configurationinboard-jointed configurationinertially slender configurationinlet configurationinversely derived configurationiron bird configurationjet balanced configurationjoined wing configurationlanding configurationLEX configurationlifting body configurationlighting configurationlow-bypass configurationlow-drag configurationlow-fineness-ratio configurationlow-overshoot configurationlow-signature configurationlow-speed configurationmaneuver configurationmidwing configurationminimum drag configurationmixed-class configurationmultisurface configurationmultibody configurationmultiengine configurationmultiple-jet configurationnormal-shock configurationnose-boom-off configurationnose-boom-on configurationoblique-wing configurationopen-loop configurationordnance configurationover-the-wing configurationpanelized configurationparcel-freighter configurationpartial-freight configurationpassenger configurationpayload configurationpitch control configurationpitch attitude-tracking configurationpitch-only configurationpitch rate command configurationpodded configurationpole-zero configurationpoor RSS configurationpower approach configurationpower-on aircraft configurationpowered configurationpowerplant configurationpre-production configurationproduction configurationpropulsor configurationpusher configurationratchet configurationreal configurationrear-loading configurationrotor plus wing configurationrotor-airframe configurationrotor-fuselage configurationrotor-winglet configurationrotorcraft configurationseating configurationsensor configurationside-by-side configurationsimulation configurationsingle-jet configurationsingle-body configurationsingle-engine configurationsingle-fuselage configurationsingle-pilot configurationsingle-rotor configurationsingle-shaft configurationsized configurationslat configurationsoft in-plane configurationspoiler configurationstable configurationstall-resistant configurationstarting configurationsteady flight configurationstiff in-plane configurationSTOL configurationstore configurationSTOVL configurationstraight-wing configurationstrake off configurationstrake-wing configurationsupersonic cruise configurationsymmetrical missile configurationT-tail configurationtail configurationtail control configurationtail-aft configurationtailed configurationtailed-delta configurationtailless configurationtakeoff configurationtandem configurationtandem-wing configurationtandem-rotor configurationtest configurationthree shaft configurationthree-engine configurationthree-shock configurationthrust-down configurationthrust-up configurationthrust-vectored configurationtilt-rotor configurationtilting engine configurationtip-jointed configurationtractor configurationtrailing-edge configurationTrefftz-plane configurationtunnel-supported configurationturbojet-powered configurationturboprop configurationturboshaft configurationturning configurationtwin-lift helicopter configurationtwo-bladed configurationtwo-cabin configurationtwo-engine configurationtwo-shaft configurationtwo-stage configurationtwo-surface configurationunder-the-wing configurationunslatted configurationunstable configurationunstick configurationup and away configurationupper-surface-blowing configurationupper-surface-blown configurationUSB configurationV/STOL configurationvariable-bypass-ratio configurationvariable-geometry configurationVATOL configurationvectored-engine-over-wing configurationVEO-wing configurationvertical ellipse configurationVTOL configurationwidely spaced pod configurationWild Weasel configurationwing configurationwing mounted configurationwing-body-nacelle configurationwing-body-tail configurationwing-canard configurationwing-fence configurationwing-flap configurationwing-spoiler-flap configurationwing-tail-fuselage configurationwing-store configurationyaw vane configurationzig-zag configuration -
15 configuration
конфигурация; схема; компоновка; вариант (ЛА) ; положение ( органов ЛА) ; форма; система размещения [расположения]; расположение тела в потокеcross-sectional configuration of grain — форма заряда (твёрдого ракетного топлива) в поперечном сечении
fully extended configuration of the wings — полностью развёрнутое положение крыла (изменяемой стреловидности)
fully swept configuration of the wings — полностью убранное положение крыла (изменяемой стреловидности)
multiple jato launching configuration — расположение нескольких ракетных ускорителей [стартовых двигателей]
one power-unit inoperative approach configuration — конфигурация для захода на посадку при одной неработающей двигательной установке
Englsh-Russian aviation and space dictionary > configuration
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16 vehicle
(авто)транспортное средство; летательный аппарат; ракета, см. тж. aircraft, missile, spacecraft; растворитель, связующее веществоlimited power space vehicle — КЛА с силовой установкой ограниченной тяги [ограниченного ресурса работы]
multipurpose manned entry space vehicle — многоцелевой пилотируемый КЛА, рассчитанный на вход в атмосферу
nonspinning reentry space vehicle — КЛА, нестабилизируемый вращением при входе в атмосферу
nuclear(-powered, -propelled) vehicle — ЛА с ядерной силовой [двигательной] установкой
pogo-stick type lunar surface vehicle — аппарат с пружинным шестом для передвижения по лунной поверхности
space shuttle booster vehicle — ускоритель [стартовый двигатель] челночного воздушно-космического аппарата
spinning reentry space vehicle — КЛА, стабилизируемый вращением при входе в атмосферу
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17 Dassault (Bloch), Marcel
SUBJECT AREA: Aerospace[br]b. 22 January 1892 Paris, Franced. 18 April 1986 Paris, France[br]French aircraft designer and manufacturer, best known for his jet fighters the Mystère and Mirage.[br]During the First World War, Marcel Bloch (he later changed his name to Dassault) worked on French military aircraft and developed a very successful propeller. With his associate, Henri Potez, he set up a company to produce their Eclair wooden propeller in a furniture workshop in Paris. In 1917 they produced a two-seater aircraft which was ordered but then cancelled when the war ended. Potez continued to built aircraft under his own name, but Bloch turned to property speculation, at which he was very successful. In 1930 Bloch returned to the aviation business with an unsuccessful bomber followed by several moderately effective airliners, including the Bloch 220 of 1935, which was similar to the DC-3. He was involved in the design of a four-engined airliner, the SNCASE Languedoc, which flew in September 1939. During the Second World War, Bloch and his brothers became important figures in the French Resistance Movement. Marcel Bloch was eventually captured but survived; however, one of his brothers was executed, and after the war Bloch changed his name to Dassault, which had been his brother's code name in the Resistance. During the 1950s, Avions Marcel Dassault rapidly grew to become Europe's foremost producer of jet fighters. The Ouragon was followed by the Mystère, Etendard and then the outstanding Mirage series. The basic delta-winged Mirage III, with a speed of Mach 2, was soon serving in twenty countries around the world. From this evolved a variable geometry version, a vertical-take-off aircraft, an enlarged light bomber capable of carrying a nuclear bomb, and a swept-wing version for the 1970s. Dassault also produced a successful series of jet airliners starting with the Fan Jet Falcon of 1963. When the Dassault and Breguet companies merged in 1971, Marcel Dassault was still a force to be reckoned with.[br]Principal Honours and DistinctionsGuggenheim Medal. Deputy, Assemblée nationale 1951–5 and 1958–86.Bibliography1971, Le Talisman, Paris: Editions J'ai lu (autobiography).Further Reading1976, "The Mirage Maker", Sunday Times Magazine (1 June).Jane's All the World's Aircraft, London: Jane's (details of Bloch and Dassault aircraft can be found in various years' editions).JDSBiographical history of technology > Dassault (Bloch), Marcel
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18 design
проект; расчёт; конструкция; схема (ЛА) ; рассчитывать; конструировать; расчётный; проектныйsolid propellant grain design — конструкция [форма] заряда твёрдого ракетного топлива
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19 Wallis, Sir Barnes Neville
[br]b. 26 September 1887 Ripley, Derbyshire, Englandd. 30 October 1979 Leatherhead, Surrey, England[br]English aeronautical designer and inventor.[br]Wallis was apprenticed first at Thames Engineering Works, and then, in 1908, at John Samuel White's shipyard at Cowes. In 1913, the Government, spurred on by the accelerating development of the German Zeppelins (see Zeppelin, Ferdinand von), ordered an airship from Vickers; Wallis was invited to join the design team. Thus began his long association with aeronautical design and with Vickers. This airship, and the R80 that followed it, were successfully completed, but the military lost interest in them.In 1924 the Government initiated a programme for the construction of two airships to settle once and for all their viability for long-dis-tance air travel. The R101 was designed by a Government-sponsored team, but the R100 was designed by Wallis working for a subsidiary of Vickers. The R100 took off on 29 July 1930 for a successful round trip to Canada, but the R101 crashed on its first flight on 4 October, killing many of its distinguished passengers. The shock of this disaster brought airship development in Britain to an abrupt end and forced Wallis to direct his attention to aircraft.In aircraft design, Wallis is known for his use of geodesic construction, which combined lightness with strength. It was applied first to the single-engined "Wellesley" and then the twin-en-gined "Wellington" bomber, which first flew in 1936. With successive modifications, it became the workhorse of RAF Bomber Command during the Second World War until the autumn of 1943, when it was replaced by four-engined machines. In other areas, it remained in service until the end of the war and, in all, no fewer than 11,461 were built.Wallis is best known for his work on bomb design, first the bouncing bomb that was used to breach the Möhne and Eder dams in the Ruhr district of Germany in 1943, an exploit immortalized in the film Dambusters. Encouraged by this success, the authorities then allowed Wallis to realize an idea he had long urged, that of heavy, penetration bombs. In the closing stages of the war, Tallboy, of 12,000 lb (5,400 kg), and the 10-ton Grand Slam were used to devastating effect.After the Second World War, Wallis returned to aeronautical design and was given his own department at Vickers to promote his ideas, principally on variable-geometry or swing-wing aircraft. Over the next thirteen years he battled towards the prototype stage of this revolutionary concept. That never came, however; changing conditions and requirements and increasing costs led to the abandonment of the project. Bit-terly disappointed, Wallis continued his researches into high-speed aircraft until his retirement from Vickers (by then the British Aircraft Corporation), in 1971.[br]Principal Honours and DistinctionsKnighted 1968. FRS 1945.Further ReadingJ.Morpurgo, 1972, Barnes Wallis: A Biography, London: Longman (a readable account, rather biased in Wallis's favour).C.J.Heap, 1987, The Papers of Sir Barnes Wallis (1887–1979) in the Science Museum Library, London: Science Museum; with a biographical introd. by L.R.Day.LRDBiographical history of technology > Wallis, Sir Barnes Neville
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20 machine
машина, механизм; станок; установка; летательный аппарат; механически обрабатыватьdata handling [processing] machine — машина для обработки данных
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Aircraft — An aircraft is a vehicle which is able to fly through the Earth s atmosphere or through any other atmosphere. Rocket vehicles are not aircraft if they are not supported by the surrounding air. All the human activity which surrounds aircraft is… … Wikipedia
Aircraft flight mechanics — In aeronautics, aircraft flight mechanics is the study of the forces that act on an aircraft in flight, and the way the aircraft responds to those forces. [Clancy, L.J. Aerodynamics . Section 14.1] Aircraft flight mechanics are relevant to… … Wikipedia
variable-sweep — vaˈriable sweepˈ adjective (of an aircraft wing) of which the sweep back may be varied, as on a variable geometry aeroplane • • • Main Entry: ↑variable … Useful english dictionary
Oblique wing — on a NASA AD 1 An oblique wing (also called a slew wing) is a variable geometry wing concept. On an aircraft so equipped, the wing is designed to rotate on center pivot, so that one tip is swept forward while the opposite tip is swept aft. By… … Wikipedia
Swept wing — A swept wing is a wing planform common on high speed aircraft, with the wing swept back instead of being set at right angles to the fuselage. This is a useful drag reducing measure for aircraft flying just below the speed of sound. Forward sweep… … Wikipedia