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engine+capacity

  • 121 коэффициент


    coefficient (coeff.), factor
    безразмерное число, в основном отношение к-п. величин, характеризующих заданные условия. — а number indicating the amount of some change under certain specified сoпditions, often expressed as a ratio.
    - безопасностиfactor of safety
    число, равное отношению расчетной нагрузки к эксплуатационной. расчетная нагрузка - произведение эксплуатационной нагрузки на коэффициент безопасности. — а number indicating the ratio between the ultimate load and limit load (maximum load expected in service). ultimate load is limit load multiplied by factor of safety.
    - восстановления давленияpressure recovery factor
    - двухконтурности (дтрд)bypass ratio
    - загрузки пассажирами, безубыточный — passenger break-even load factor
    - запаса длины вппfield length factor
    - запаса длины летной полосыfield length factor
    - запаса длины летной полосы в направлении взлетаtakeoff field length factor
    - запаса длины летной полосы в направлении посадкиlanding field length factor
    - запаса длины летной полосы при всех работающих двигателейfield length factor for all-engines-operating сase
    - запаса длины летной полосы при одном отказавшем двигателеfield length factor for one-engine-inoperative ease
    - запаса прочностиreserve factor
    отношение фактической прочности конструкции к минимально-потребной в данных условиях. — а ratio of the actual strength of the structure to the minimum required to specific condition.
    - заполнения (в вычислительном уст-ве) — duty factor in computer, the ratio of active time to total time.
    - заполнения (воздушного) винтаpropeller solidity ratio
    отношение суммарной площади всех лопастей винта к сметаемой ими площади. — the ratio of the total projected blade area to the area of the projected outline of the propeller disc.
    - заполнения несущего винта (вертолета) — rotor solidity ratio solidity of rotor is a ratio of the total blade area to the disc area.
    - лобового сопротивления (сх)drag coefficient (cd)
    коэффициент, характеризующий лобовое сопротивление рассматриваемого аэродинамического профиля. — а coefficient representing the drag on а given airfoil.
    - маневренной перегрузкиmaneuvering load factor
    - момента кренаrolling-moment coefficient
    - момента рысканияyawing-moment coefficient
    - момента тангажаpitching-moment coefficient
    - мощностиpower factor
    - мощности (воздушного винта)activity factor
    - мощности лопасти (возд. винта) — blade activity factor
    безразмерная функция поверхности лопасти, характеризующая способность лопасти использовать прикладываемую мощность. — а non-dimensional function of the blade surface used to express capacity of a blade for absorbing power.
    - несущей поверхности (покрытия аэродрома), калифорнийский — californian bearing ratio (с.в.r.)
    -, относительный (воздушного винта) — figure of merit
    - перегрузки (n)load factor (n)
    число, показывающее, во сколько раз нагрузки, действующие на самолет (или его отдельные части), превышает нагрузки в равномерном горизонтальном полете или нагрузки от веса при стоянке. — the ratio to the weight of an aircraft of а specified exterпаl load. such load may arise from aerodynamic forces, gravity, ground or water reaction, or from combinations of these forces.
    - перегрузки, максимальный эксплуатационный — limit load factor
    - перегрузки, (полетный) — flight load factor
    отношение составляющей аэродинамической нагрузки (действующей перпендикулярно продольной оси ла) к весу ла. — the ratio of the aerodynamic force component (acting normal to the assumed longitudiпа1 axis of the airplane) to the weight of the airplane.
    - перегрузки (полетной), отрицательный — negative load factor
    - перегрузки (полетной), положительный — positive load factor
    в данном случае аэродинамичеекая сила воздействует на ла снизу вверх. — in positive load factor the aerodynamic force acts upward with respect to the airplane.
    - перегрузки при маневреmaneuvering load factor
    - перегрузки при маневре, максимальный эксплуатационный — limit maneuvering load factor
    - перегрузки, расчетный — ultimate load factor
    - передачи (коэффициент передаточного числа в системе управления ла)gain
    - подъемной силы (су) безразмерная величина, определяемая по формуле. — lift coefficient (cl) а coefficient representing the lift of а given airfoil or other body. the lift coefficient is obtained ьу dividing the lift by the free-stream dynamic pressure and by the representative area under consideration.
    - полезного действия (кпд)efficiency (n)

    the ratio of the useful output of the quantity to its total input.
    - полезного действия, общий — overall efficiency
    - полезного действия,тепловой — thermal efficiency
    -, поправочный — correction factor
    например, для учета влияния погодных (сезонных) условий (температура наружного воздуха, атмосферные осадки, обледенение) на характеристики тормозного участка впп в пределах установленных эксплуатационных ограничений. — the correction factors must account for the particular surface characteristics of the stopway and the variations in these characteristics with seasonal weather conditions (such as temperature, rain, snow, and ice) within the established operational limits.
    - предельной перегрузкиultimate load factor
    - преобразования (в преобразователе) — conversion efficiency ratio of dc output power to ас input power.
    - профильного сопротивленияprofile drag coefficient
    - прочности грунта, калифорнийский — californian bearing ratio (c.b.r.)
    (к. несущей способности покрытия аэродрома, впп) — c.b.r. is used to measure subsoil strength of the runways and airfields.
    - связи (эл.) — coupling coefficient
    - сжимаемостиcoefficient of compressibility
    относительное уменьшение объема газа при повышении давления в изотермическом процессе. — the relative decrease of the volume of а gaseous system with increasing pressure in an isothermal process.
    - совершенства (воздушного винта)figure of merit
    - сопротивления (лобовой, сx) — drag coefficient (cd)
    - сопротивления (сx) груза на внешней подвеске (вертолета) — drag coefficient (cd) representing а drag caused by an externally-slung load
    - стоячей волныstanding wave ratio (swr)
    - схождения картыchart convergence factor (ccf)
    - сцепления (между шиной колеса и поверхностью впп)coefficient of friction
    -, сцепления (между шиной и впп при торможении) — braking coefficient of friction
    - трансформации (в трансформаторе) — transformation ratio compensation windings are used to correct for variations in the resolvers transformation ratio.
    - тренияcoefficient of friction
    - трения торможенияbraking coefficient of friction
    коэффициент трения между шиной и поверхностью взлетно-посадочной полосы при торможении самолета. — braking coefficient of friction between the aircraft wheel tires and runway (surface).
    - трения торможения, осредненный приведенный — (mean) corrected braking coefficient of friction
    - тяги (воздушного винта)thrust coefficient (ст)
    - усиления (эл.) — amplification factor

    the ratio of output magnitude to input magnitude.
    - усиления антенныantenna gain
    - усиления (передаточное число в системе управления)gain
    - усиления, самонастраивающийся (системы управления) — adaptive gain
    - утечкиleakage factor
    - шарнирного моментаhinge moment factor
    - шарнирного момента от порыва ветра на земле, предельный — limit hinge moment factor (к) for ground gusts
    в отношении элеронов и рулей высоты, коэффициент имеет положительный знак, если момент, воздействующий на поверхность управления, вызывает ее опускание. — for ailerons and elevators, а positive value of к indicates а moment tending to depress the surface, and а negative value of к - to raise the surface.
    - шумаnoise factor
    для данной полосы частот, отношение суммарной величины помех на выходе к величине помехи на входе. — for а given bandwidth, the ratio оf total noise at the output, to the noise at the input.
    - эксплуатационной маневренной перегрузки (максимальный), или эксплуатационной перегрузки при маневрировании (отрицательный или попожительный) — (negative, positive) limit maneuvering load factor rotorcraft must be designed for positive limit maneuvering load factor of 3.5 and negafive limit maneuvering load factor of 1.0.

    Русско-английский сборник авиационно-технических терминов > коэффициент

  • 122 отношение


    relationship
    (взаимосвязь)
    - (математическая зависимость)relation
    - (параметр, представляющий собой отношение двух величин) — ratio
    - веса к емкостиweight-to-capacity ratio
    - водности облаков к среднемy эффективному диаметру капельliquid water content vs mean effective drop diameter
    - давленийpressure ratio
    - давлений в соплеexhaust nozzle pressure ratio
    - давлений на входе и выходе двигателя (степень повышения давления)engine pressure ratio (epr)
    - диаметра втулки винта к диаметру винта (относительный диаметр втулки)hub ratio
    - массmass ratio
    - массы к площадиmass-area ratio
    -, обратное — inverse ratio
    -, передаточное (редуктора) — gear ratio
    отношение угловых скоростей двух зубчатых колес.
    -, передаточное (от рычагов к поверхностям управления) — gearing ratio
    -, передаточное (коэффициент усиления в автоматической системе управления) — gain
    - площадейarea ratio
    - площадей критического и выходного сечения (сопла) — throat/exit area ratio
    - подъемной силы к лобовомy сопротивлению — lift-drag ratio, l/d ratio
    -, прямое — direct ratio
    -, самонастраивающееся передаточное (системы управления) — adaptive gain
    - тяги к весу — thrust-weight ratio, t/w ratio
    по о. (при определении взаимных перемещений) определяться о. — relative to, with respect to... be defined by the relation

    Русско-английский сборник авиационно-технических терминов > отношение

  • 123 пакет


    pack
    - (узел)assembly
    - гигиеническийsickness bag
    - дисков, тормозных — brake rotor and stater assemblies
    - для регулирования времени приемистостиacceleration time adjuster
    -, дроссельный (второй, пeрвой ветви приемистости двиг.) — (second, first)-stage acceleration control line flow restrictor
    -, дроссельный (гаситель гидроудара) (рис. 98) — dashpot
    -, дроссельный (механизма приемистости) — (acceleration control) flow restricter
    -, дроссельный (ограничитель расхода жидкости) (рис. 90) — flow restrictor
    проливать дроссельный п. (для замера пропускной способности) — test the flow restrictor for flow rate (capacity)
    - пружиныspring pack
    - распыливания (топливной форсунки)atomizer assembly
    - рычагов (управления двигателем) (фиг. 46) — (engine controls) guadrant
    - (сигналов)(signal) train
    - спасательного плотаlife raft pack
    - фильтра (набор фильтрующих элементов, напр., шайб, пластин) — filter stack
    -, фильтрующий (элемент) — filtering element
    - якоря (генератора, эл. мотора) (рис. 74) — armature iron laminations
    обмотка уложена в пазы якоря, — winding is laid in slots of armature iron laminations.

    Русско-английский сборник авиационно-технических терминов > пакет

  • 124 сила


    force
    - (при расчете на прочность)load
    -, аэродинамическая — aerodynamic force
    сила, воздействующая на тело при обтекании его воздушным потоком. — the force exerted by а moving gaseous fluid upon а body completely immersed in it
    -, аэродинамическая подъемная — lift (l)
    - аэродинамического сопротивленияdrag (d)
    -, аэростатическая подъемная — aerostatic lift
    разность между весами равных объемов воздуха и газа, который легче воздуха. — the difference between the weight of а volume of air and of an equal volume of a gas lighter-than-air under given conditions.
    -, боковая — lateral force
    -, боковая (для случая нагружения) — side load. for the side load condition, the airplane is assumed to be in the level attitude.
    - бокового ветраcrosswind force
    - ветраwind force
    -, внешняя (напряжения, среза и т.п.) — external force. as tension, shear, etc.
    -, внешняя (действующая на гироскоп) — applied torque
    -, внутренняя — internal force
    - возмущения (напр., воздействующая на акселерометр или гироскоп) — disturbing force
    - восстановления (акселерометра или гироскопа)restoring force
    -, гравитационная — force of gravity
    - давленияpressure force
    - девиации силы магнитного поля ла, действующие на магнитный компас. — deviation force
    -, действующая — acting force
    -, действующая вдоль траектории полета — force acting in the direction of flightpath
    -, действующая на... — force acting /exerted/ on...
    - (усилие) летчика, действующая на органы управления самолетом — pilot force
    аэродинамические нагрузки на поверхности управления не должны превышать усилий летчика на соответствующие органы управленияю. — the air loads on movable surfaces and the corresponding deflections need not exceed those that would result in flight from the application of any pilot force.
    - (усилие) летчика, действующая на ручку управления — stick pilot force
    -, действующая на самолет — force acting on the airplane
    в прямолинейном горизонтальном полете на самолет действуют следующие силы: подъемная сила, вес, тяга, лобовое сопротивление (рис. 141). — there are four net forces acting on the airplane in straight and level flight: lift, weight, thrust, drag.
    -, демпфирующая — damping force
    - инерцииinertial force
    сила инерции пропорциональна и противоположно направлена силе ускорения. — inertial force is proportional and directionally opposite to the accelerating force.
    -, кажущаяся подъемная — apparent lift
    - крученияtorsional force
    - лобового сопротивленияdrag (d)
    аэродинамическая сила, направленная против движения самолета. — а retarding force acting upon an aircraft in motion through the air.
    -, ложная подъемная — false lift
    -, лошадиная (лс) — horsepower (hp)
    единица измерения мощности — а unit of power, or the capacity of a mechanism to do work.
    -, мгновенная — momentary force
    - несущего винта, подъемная — rotor lift
    подъемная сила несущего винта равна весу вертолета. — rotor lift equal to the rotorcraft weight.
    -, неуравновешенная — out-of-balance force
    -, нулевая подъемная — zero lift
    -, осевая — axial force
    -, отрицательная подъемная — negative lift
    - поверхностного трения (обшивки)skin-friction force
    -, подъемная — lift (l)
    составляющая полной аэродинамической силы, перпендикулярная направлению невозмущенного потока, обтекающего ла. — that component of the total aerodynamic force acting on an aircraft perpendicular to the undisturbed airflow relative to the aircraft.
    -, полная подъемная — total lift
    -, поперечная — lateral force
    -, потребная подъемная — required lift
    -, приложенная — applied force
    -, противодействующая — counterforce
    -, равнодействующая — resultant force
    сила эквивалентная рассматриваемой системе сил, приложенных к телу. — the single force which, if acting alone, would produce the same effect as several forces combined.
    -, располагаемая подъемная — available lift
    -, реактивная — reactive force
    - реакцииreaction
    - реакции, вертикальная — vertical reaction

    the vertical reactions must be combined with horizontal drag reactions.
    - светаlight intensity
    - света в перекрывающихся световых пучках (ано)intensity in overlaps between adjacent signals
    - света, мгновенная — instantaneous (light) intensity
    -, составляющая — component force
    -, статическая подъемная — static lift
    - сцепления (при склейке)adhesive force
    -, термоэлектродвижущая — thermoelectromotive force (temf)
    - токаcurrent (intensity)
    - тренияfriction force
    - тягиthrust
    толкающая или тянущая сила, создаваемая возд. винтом или трд. — the pushing or pulling force developed by an aircraft engine or a propeller.
    - тяжестиgravity
    - удараimpact force
    -, управляющая — control force
    -, уравновешенная — balanced force
    -, уравновешивающая — balancing force
    - ускорения — acceleration /accelerating/ force
    -, центробежная — centrifugal force
    сила, возникающая во вращающемся теле, направленная от центра (оси) вращения. — a force in а rotating system, deflecting masses radially outward from the axis of rotation.
    -, центростремительная — centripetal force
    -, чистая подъемная — net lift
    -, электродвижущая (эдс) — electromotive force (emf)
    влияние с. — force effect
    действие с. — action of force
    приложение с. — application of force
    вступать в с. (о документе) — be effective
    создавать подъемную с. — create /produce/ lift

    Русско-английский сборник авиационно-технических терминов > сила

  • 125 форсунка


    nozzle, burner
    - (составная часть топливной форсунки) — jet, orifice
    -, вихревая (топливная) — swirl-type fuel nozzle
    - воспламенителя, пусковая — igniter (starting) fuel nozzle
    - второго (топливного контура) — main fuel nozzle /burner/
    - второго контура (двухконтурной топливной форсунки) — main jet /orifice/
    при увеличении расхода топпива топливо подается одновременно через каналы первora и второго контура форсумки. — as fuel flow increase the fuel is supplied through the burпег primary and main jets simultaneous
    -, двухканальная (топливная) — dual orifice /duplex/ fuel nozzle /burner/
    при запуске и малом газе подача топлива в камеру сгорания осуществляется через центрлльное отверстие форсунки,a при режимной работе двигателя через отверстия обоих каналов, — during starting and idling the small centre orifice (primary fuel) will generate a fine spray, while for higher fuelflows both the inne outer orifices (primary and main jets) generate single fine spray simultaneously.
    -, двухкаскадная (топливная) — duplex /dual orifice/ fuel nozzle /burner/

    a fuel nozzle with main and primary fuel orifices controlled by the nozzle distributor valve.
    -, двухконтурная (топливная) — dual orifice /duplex/ fuel nozzle /burner/
    -, двухсопловая (топливная) — dual orifice /duplex, two-jet/ fuel nozzle /burner/
    -, масляная — oil jet
    для подачи масла к трущимся деталям двигателя под давлением, — oil jet meters oil for lubrication of engine parts subject to friction.
    - непосредственного впрыска топлива (пд)fuel injection nozzle
    -, одноканальная (топливная) — single orifice /simplex/ fuel nozzle
    -, одноконтурная (топливная) — single orifice /simplex/ fuel nozzle
    -, односопловая (топливная) — simplex fuel spray nozzle /burner/
    - первого (топливного контура)primary fuel nozzle
    розжиг топливо-воздушной смеси обеспечивается воспламенителями (с пусковыми форсунками), при этом работают форсунки перзого контура. — during starting and idling the fuel flows through the prifuel nozzles.
    - первого контура (двухконтурной топливн. форсунки) — primary fuel orifice /jet/
    -, противопожарная — fire extinguishing jet
    -, пусковая (топливная) — starting fuel nozzle /burner/
    для подачи топлива в камеру сгорания при запуске двигателя.
    -, рабочая (топливная) — main fuel nozzle /burner/
    для подачи топлива в камеру сгорания на всех режимах работы двигателя.
    - (-) распылитель (топливной форсунки)atomizing jet
    -, струйная — spray nozzle
    -, топливная (узел) — fuel (spray) nozzle, burner
    топливные форсунки подают топливо в камеры сгорания и обеспечивают его распыление: каждая ф. имеет два коаксиальных канала (первый, второй), — burners feed /introduce/ the fuel into the combustion chambers and ensure that the fuel is highly atomized. each burner incorporates two coaxial atomizing jets (primary and main).
    - форсажной камеры (топливная) — afterburner fuel burner /nozzle/
    -, центробежная проливать ф. (для замера производительности) — swirl-type nozzle test fuel nozzle for flow (rate) capacity

    Русско-английский сборник авиационно-технических терминов > форсунка

  • 126 Bateman, John Frederick La Trobe

    [br]
    b. 30 May 1810 Lower Wyke, near Halifax, Yorkshire, England
    d. 10 June 1889 Moor Park, Farnham, Surrey, England
    [br]
    English civil engineer whose principal works were concerned with reservoirs, water-supply schemes and pipelines.
    [br]
    Bateman's maternal grandfather was a Moravian missionary, and from the age of 7 he was educated at the Moravian schools at Fairfield and Ockbrook. At the age of 15 he was apprenticed to a "civil engineer, land surveyor and agent" in Oldham. After this apprenticeship, Bateman commenced his own practice in 1833. One of his early schemes and reports was in regard to the flooding of the river Medlock in the Manchester area. He came to the attention of William Fairbairn, the engine builder and millwright of Canal Street, Ancoats, Manchester. Fairbairn used Bateman as his site surveyor and as such he prepared much of the groundwork for the Bann reservoirs in Northern Ireland. Whilst the reports on the proposals were in the name of Fairbairn, Bateman was, in fact, appointed by the company as their engineer for the execution of the works. One scheme of Bateman's which was carried forward was the Kendal Reservoirs. The Act for these was signed in 1845 and was implemented not for the purpose of water supply but for the conservation of water to supply power to the many mills which stood on the river Kent between Kentmere and Morecambe Bay. The Kentmere Head dam is the only one of the five proposed for the scheme to survive, although not all the others were built as they would have retained only small volumes of water.
    Perhaps the greatest monument to the work of J.F.La Trobe Bateman is Manchester's water supply; he was consulted about this in 1844, and construction began four years later. He first built reservoirs in the Longdendale valley, which has a very complicated geological stratification. Bateman favoured earth embankment dams and gravity feed rather than pumping; the five reservoirs in the valley that impound the river Etherow were complex, cored earth dams. However, when completed they were greatly at risk from landslips and ground movement. Later dams were inserted by Bateman to prevent water loss should the older dams fail. The scheme was not completed until 1877, by which time Manchester's population had exceeded the capacity of the original scheme; Thirlmere in Cumbria was chosen by Manchester Corporation as the site of the first of the Lake District water-supply schemes. Bateman, as Consulting Engineer, designed the great stone-faced dam at the west end of the lake, the "gothic" straining well in the middle of the east shore of the lake, and the 100-mile (160 km) pipeline to Manchester. The Act for the Thirlmere reservoir was signed in 1879 and, whilst Bateman continued as Consulting Engineer, the work was supervised by G.H. Hill and was completed in 1894.
    Bateman was also consulted by the authorities in Glasgow, with the result that he constructed an impressive water-supply scheme derived from Loch Katrine during the years 1856–60. It was claimed that the scheme bore comparison with "the most extensive aqueducts in the world, not excluding those of ancient Rome". Bateman went on to superintend the waterworks of many cities, mainly in the north of England but also in Dublin and Belfast. In 1865 he published a pamphlet, On the Supply of Water to London from the Sources of the River Severn, based on a survey funded from his own pocket; a Royal Commission examined various schemes but favoured Bateman's.
    Bateman was also responsible for harbour and dock works, notably on the rivers Clyde and Shannon, and also for a number of important water-supply works on the Continent of Europe and beyond. Dams and the associated reservoirs were the principal work of J.F.La Trobe Bateman; he completed forty-three such schemes during his professional career. He also prepared many studies of water-supply schemes, and appeared as professional witness before the appropriate Parliamentary Committees.
    [br]
    Principal Honours and Distinctions
    FRS 1860. President, Institution of Civil Engineers 1878, 1879.
    Bibliography
    Among his publications History and Description of the Manchester Waterworks, (1884, London), and The Present State of Our Knowledge on the Supply of Water to Towns, (1855, London: British Association for the Advancement of Science) are notable.
    Further Reading
    Obituary, 1889, Proceedings of the Royal Society 46:xlii-xlviii. G.M.Binnie, 1981, Early Victorian Water Engineers, London.
    P.N.Wilson, 1973, "Kendal reservoirs", Transactions of the Cumberland and Westmorland Antiquarian and Archaeological Society 73.
    KM / LRD

    Biographical history of technology > Bateman, John Frederick La Trobe

  • 127 Brown, Andrew

    SUBJECT AREA: Ports and shipping
    [br]
    b. October 1825 Glasgow, Scotland
    d. 6 May 1907 Renfrew, Scotland
    [br]
    Scottish engineer and specialist shipbuilder, dredge-plant authority and supplier.
    [br]
    Brown commenced his apprenticeship on the River Clyde in the late 1830s, working for some of the most famous marine engineering companies and ultimately with the Caledonian Railway Company. In 1850 he joined the shipyard of A. \& J.Inglis Ltd of Partick as Engineering Manager; during his ten years there he pioneered the fitting of link-motion valve gear to marine engines. Other interesting engines were built, all ahead of their time, including a three-cylinder direct-acting steam engine.
    His real life's work commenced in 1860 when he entered into partnership with the Renfrew shipbuilder William Simons. Within one year he had designed the fast Clyde steamer Rothesay Castle, a ship less than 200 ft (61 m) long, yet which steamed at c.20 knots and subsequently became a notable American Civil War blockade runner. At this time the company also built the world's first sailing ship with wire-rope rigging. Within a few years of joining the shipyard on the Cart (a tributary of the Clyde), he had designed the first self-propelled hopper barges built in the United Kingdom. He then went on to design, patent and supervise the building of hopper dredges, bucket ladder dredges and sand dredges, which by the end of the century had capacity of 10,000 tons per hour. In 1895 they built an enclosed hopper-type ship which was the prototype of all subsequent sewage-dumping vessels. Typical of his inventions was the double-ended screw-elevating deck ferry, a ship of particular value in areas where there is high tidal range. Examples of this design are still to be found in many seaports of the world. Brown ultimately became Chairman of Simons shipyard, and in his later years took an active part in civic affairs, serving for fifteen years as Provost of Renfrew. His influence in establishing Renfrew as one of the world's centres of excellence in dredge design and building was considerable, and he was instrumental in bringing several hundred ship contracts of a specialist nature to the River Clyde.
    [br]
    Principal Honours and Distinctions
    Vice-President, Institution of Engineers and Shipbuilders in Scotland.
    Bibliography
    A Century of Shipbuilding 1810 to 1910, Renfrew: Wm Simons.
    Further Reading
    F.M.Walker, 1984, Song of the Clyde. A History of Clyde Shipbuilding, Cambridge.
    FMW

    Biographical history of technology > Brown, Andrew

  • 128 Ilgner, Karl

    SUBJECT AREA: Electricity
    [br]
    b. 27 July 1862 Neisse, Upper Silesia (now Nysa, Poland)
    d. 18 January 1921 Berthelsdorf, Silesia
    [br]
    German electrical engineer, inventor of a transformer for electromotors.
    [br]
    Ilgner graduated from the Gewerbeakademie (the forerunner of the Technical University) in Berlin. As the representative of an electric manufacturing company in Breslau (now Wroclaw, Poland) from 1897, he was confronted with the fact that there were no appropriate drives for hoisting-engines or rolling-plants in steelworks. Two problems prevented the use of high-capacity electric motors in the mining as well as in the iron and steel industry: the reactions of the motors on the circuit at the peak point of stress concentration; and the complicated handling of the control system which raised the risks regarding safety. Having previously been head of the department of electrical power transmission in Hannover, he was concerned with the development of low-speed direct-current motors powered by gas engines.
    It was Harry Ward Leonard's switchgear for direct-current motors (USA, 1891) that permitted sudden and exact changes in the speed and direction of rotation without causing power loss, as demonstrated in the driving of a rolling sidewalk at the Paris World Fair of 1900. Ilgner connected this switchgear to a large and heavy flywheel which accumulated the kinetic energy from the circuit in order to compensate shock loads. With this combination, electric motors did not need special circuits, which were still weak, because they were working continuously and were regulated individually, so that they could be used for driving hoisting-engines in mines, rolling-plants in steelworks or machinery for producing tools and paper. Ilgner thus made a notable advance in the general progress of electrification.
    His transformer for hoisting-engines was patented in 1901 and was commercially used inter alia by Siemens \& Halske of Berlin. Their first electrical hoisting-engine for the Zollern II/IV mine in Dortmund gained international reputation at the Düsseldorf exhibition of 1902, and is still preserved in situ in the original machine hall of the mine, which is now a national monument in Germany. Ilgner thereafter worked with several companies to pursue his conception, became a consulting engineer in Vienna and Breslau and had a government post after the First World War in Brussels and Berlin until he retired for health reasons in 1919.
    [br]
    Bibliography
    1901, DRP no. 138, 387 1903, "Der elektrische Antrieb von Reversier-Walzenstraßen", Stahl und Eisen 23:769– 71.
    Further Reading
    W.Kroker, "Karl Ilgner", Neue Deutsche Biographie, Vol. X, pp. 134–5. W.Philippi, 1924, Elektrizität im Bergbau, Leipzig (a general account).
    K.Warmbold, 1925, "Der Ilgner-Umformer in Förderanlagen", Kohle und Erz 22:1031–36 (a detailed description).
    WK

    Biographical history of technology > Ilgner, Karl

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