high-time engine

— ablation-protected engine

— ablative engine

— abort engine

— accelerating rocket engine

— acid-cooled rocket engine

— actual engine

— adjustable-thrust rocket engine

— aerojet engine

— aeropulse engine

— aerothermodynamic integration engine

— afterburning engine

— aft-fan engine

— ailing engine

— air engine

— airborne rocket engine

— air-breathing engine

— air-burning engine

— air-collection engine

— air-feed engine

— air-jet engine

— airline engine

— airplane engine

— airstream engine

— alcohol engine

— all-attitude engine

— all-fuel engine

— ancillary engine

— annihilation rocket engine

— antispin rocket engine

— apogee engine

— arcjet engine

— arresting engine

— ascent engine

— assist-climb rocket engine

— assisted takeoff engine

— atmospheric jet engine

— attitude-control engine

— augmented turbofan engine

— auxiliary rocket engine

— axial engine

— axial-centrifugal-flow engine

— axial-flow engine

— bare engine

— barrel engine

— basic engine

— below-wing engine

— bench engine

— bifuel rocket engine

— bipropellant rocket engine

— bleedoff rocket engine

— block-cast engine

— booster engine

— bottom engine

— brake engine

— braking engine

— buried engine

— burned engine

— bypass engine

— calibrated engine

— calibrated-thrust engine

— capacitative-cooled engine

— capsular engine

— carburetted engine

— carburettor engine

— center engine

— centrifugal-flow engine

— ceramic-coated engine

— cesium-ion engine

— chemical fuel engine

— chemical-ignition engine

— cigarette-burning rocket engine

— clear the engine

— closed-cycle engine

— clustered engine

— coaxial plasma engine

— cold engine

— cold-jet engine

— cold-reaction engine

— combustion engine

— composite engine

— compound engine

— compressorless engine

— conk-out engine

— constant-duty engine

— constant-speed engine

— constant-thrust engine

— control engine

— controllable-thrust engine

— cooled engine

— core engine

— coupled engines

— cowled engine

— critical engine

— cruise engine

— cruising engine

— cryogenic engine

— cut the engine

— dead engine

— deflected-thrust engine

— demonstrator engine

— deorbit engine

— descent engine

— development engine

— direct-drive engine

— direct-injection engine

— direct-lift engine

— disintegrating engine

— diverted-jet engine

— docking engine

— double-flow engine

— double-nozzled engine

— double-row engine

— double-unit engine

— down-rated engine

— downwind engine

— driving engine

— droppable engine

— dry engine

— dry-fuel rocket engine

— dry-sump engine

— dual function engine

— dual-chamber rocket engine

— dual-flow engine

— dual-thrust rocket engine

— ducted rocket engine

— ducted-fan engine

— duplex engine

— earth-satellite engine

— ejection-seat rocket engine

— ejector-seat rocket engine

— electrical rocket engine

— electric-ignition engine

— electromagnetic jet engine

— electrostatic rocket engine

— electrothermal jet engine

— end-burning rocket engine

— engine got sick

— engine out

— environmental engine

— escape rocket engine

— evaporative-cooled engine

— expendable engine

— expended engine

— explosive engine

— external engine

— external-burning engine

— failed engine

— fan engine

— fan-afterburner engine

— fan-burning jet engine

— fast-response rocket engine

— feathered engine

— film-cooled engine

— final-stage rocket engine

— finite-thrust engine

— finned-rocket engine

— first-stage engine

— fixed-geometry engine

— flame-ignition rocket engine

— flameout engine

— flat engine

— flat-rated engine

— flat-rating engine

— flight-cleared engine

— flight-qualified engine

— flight-type engine

— flightworthy engine

— flyable engine

— forced-induction engine

— forward-facing rocket engine

— forward-firing rocket engine

— forward-thrust jet engine

— four-chamber engine

— four-stroke engine

— free-turbine engine

— front-fan engine

— fuel-optimal engine

— full-scale engine

— full-sized engine

— fuselage-mounted engine

— gas-generator engine

— gasoline engine

— gas-pressurized rocket engine

— gas-turbine engine

— geared engine

— gearless engine

— good engine

— gun an engine

— healthy engine

— heat engine

— heat-sponge engine

— helicopter engine

— helium-injection engine

— high-bypass ratio engine

— high-compression-ratio engine

— higher-powered engine

— highly developed engine

— high-performance engine

— high-power engine

— high-pressure engine

— high-speed engine

— high-thrust engine

— high-time engine

— honeycomb engine

— horizontal-mounted engine

— hot engine

— hot peroxide engine

— hot-reaction rocket engine

— hybrid engine

— hybrid-propellant engine

— hydrazine engine

— hydrogen-burning engine

— hydrogen-electrothermal engine

— hydrogen-fluorine engine

— hydrogen-oxygen engine

— hydrogen-peroxide engine

— hydrojet engine

— hypergolic engine

— hypersonic engine

— hypothetical engine

— ideal-cycle engine

— idling engine

— ignite the engine

— impulse-duct engine

— impulse-rocket engine

— inboard engine

— inhibited engine

— injected engine

— in-line engine

— inoperative engine

— installed engine

— intermittent-cycle engine

— intermittent-detonation engine

— internal engine

— internal-combustion engine

— interplanetary engine

— inverted vee engine

— ionic engine

— ionospheric ramjet engine

— isentropic engine

— jato engine

— jet attitude engine

— jet-propulsion engine

— jet transport engine

— jet-control engine

— jet-lift engine

— jettison engine

— jumbo engine

— kerosene-burning engine

— kerosene-fueled engine

— kick engine

— kill the engine

— lander engine

— lateral-burning rocket engine

— launch vehicle engine

— launching rocket engine

— left-handed engine

— lift jet engine

— lift/propulsion engine

— lift/thrust engine

— lift-cruise engine

— liftoff engine

— lightweight engine

— limited-life engine

— limited-thrust engine

— liquid-air engine

— liquid-chemical rocket engine

— liquid-cooled engine

— liquid-fuelrocket engine

— liquid-oxygen rocket engine

— liquid-propellant rocket engine

— liquid-solid rocket engine

— liquid-sustainer engine

— live engine

— long-burning engine

— long-duration engine

— long-life engine

— long-period engine

— long-stroke engine

— low-altitude engine

— low-consumption engine

— lower-powered engine

— low-mounted engine

— low-noise-level engine

— low-performance engine

— low-pressure engine

— low-thrust engine

— lox/liquid hydrogen engine

— lunar engine

— lunar module engine

— lunar rover engine

— lunar-descent engine

— lunar-takeoff engine

— magnetic-pinch plasma engine

— magnetogasdynamie engine

— magnetohydrodynamic engine

— main engine

— main propulsion engine

— malfunctioning engine

— maneuvering engine

— master engine

— matched engine

— microrocket engine

— midcourse correction engine

— middle engine

— military engine

— missile engine

— modular engine

— monopropellant rocket engine

— monopropellant-plus-fuel engine

— movable engine

— multibank engine

— multichamber rocket engine

— multifuel engine

— multilift engines

— multiple engine

— multiple-beam ion engine

— multiple-chamber rocket engine

— multiple-nozzle engine

— multirow engine

— multi-unit rocket engine

— nacelle-mounted engine

— nameplate engine

— nonafterburning engine

— noncryogenic engine

— nonexpendable engine

— nonregenerative engine

— non-supercharged engine

— nonthrottleable engine

— nonthrust rocket engine

— nuclear-electric engine

— nuclear-fission engine

— one-flow engine

— one-shaft engine

— one-shot engine

— one-spool engine

— open-cycle engine

— operational engine

— opposed-cylinder engine

— opposed-piston engine

— orbital module engine

— orbiter engine

— orbiting ramjet engine

— ordnance turbojet engine

— orienting-thrust engine

— outboard engine

— outer engine

— outer-space engine

— overcooled engine

— oversized engine

— oxidizer-cooled rocket engine

— paired engine

— paper engine

— parallel booster engines

— peroxide engine

— petrol engine

— photon engine

— pickle an engine

— pilot engine

— piston-driven engine

— pitch-control jet engine

— pivoted engine

— plasma engine

— plasmajet engine

— plenum-chamber-burning engine

— plug-in engine

— plug-nozzle engine

— podded engine

— pod-mounted engine

— porous-cooled engine

— powder rocket engine

— powerful engine

— power-limited engine

— preproduction engine

— pressure-feed engine

— propellant-cooled engine

— propulsion engine

— propulsive jet engine

— pulse reaction engine

— pulsejet engine

— pump-fed rocket engine

— pure lift engine

— pylon-mounted engine

— quadruple-chamber rocket engine

— quantum engine

— quiet engine

— race the engine

— radial engine

— radioisotope engine

— ramjet engine

— rato engine

— RCS engine

— reaction propulsion engine

— real engine

— reciprocating engine

— recombination ramjet engine

— refractory-liner rocket engine

— regenerative engine

— regeneratively-cooled engine

— reheated engine

— relight the engine

— rematched engine

— remotely-controlled engine

— replace the engine

— replacement engine

— research engine

— resonant jet engine

— restartable engine

— restricted-burning rocket engine

— retarding rocket engine

— retractable engine

— retrofire rocket engine

— retrograde rocket engine

— retrorocket engine

— retrothrust engine

— return engine

— reusable engine

— reversed engine

— reverse-thrust rocket engine

— right-handed engine

— ring engine

— rocket engine

— rocket-ramjet engine

— roll-control jet engine

— rotary engine

— rotatable-nozzles engine

— rough-running engine

— rubber engine

— run down engine

— running engine

— satellite-like engine

— scaled-down engine

— scaled-up engine

— sealed rocket engine

— sea-level engine

— secondary engine

— second-stage engine

— segmented-rocket engine

— selfcontained-rocket engine

— separable engine

— separation engine

— series-produced engine

— service engine

— service propulsion engine

— shaft-turbine engine

— short-burning engine

— short-duration engine

— short-life engine

— short-period engine

— short-stroke engine

— shut-down engine

— shuttle engine

— side engine

— side-burning rocket engine

— simulated failed engine

— single-barrelled rocket engine

— single-chamber rocket engine

— single-nozzle engine

— single-row engine

— single-shaft engine

— single-shot engine

— single-start engine

— sleeve-valve engine

— smoke-free engine

— smokeless engine

— smoky engine

— solar engine

— solid sustainer engine

— solid-liquid rocket engine

— solid-propellant boost engine

— solid-propellant rocket engine

— space engine

— space shuttle engine

— space vehicle engine

— spaceborne engine

— spacecraft engine

— spare engine

— spark-ignition engine

— spindown engine

— spinup engine

— split-compressor engine

— stage engine

— stage-one engine

— start the engine

— starting engine

— station-keeping engine

— steam-burning rocket engine

— steerable rocket engine

— steering engine

— stopcock the engine

— storable liquid-propellant engine

— straight-jet engine

— strap-on engine

— study engine

— submerged engine

— subscale engine

— subsonic jet engine

— supercharged engine

— supercompression engine

— superperformance engine

— supersonic combustion engine

— supersonic jet engine

— supplementary engine

— surge-free engine

— sustainer engine

— sustaining engine

— sweat-cooled engine

— swiveling engine

— swiveling-nozzle engine

— symmetrically opposite engine

— tail-mounted engine

— takeoff rocket engine

— tandem boost engine

— test engine

— testbed engine

— thermal-jet engine

— thermionic engine

— thermochemical rocket engine

— thermojet engine

— thermonuclear rocket engine

— three-barreled engine

— three-chambered engine

— three-shaft engine

— three-spool engine

— throttleable engine

— throttled back engine

— thrust engine

— tiltable engine

— tilting engine

— tiny engine

— tip engine

— trajectory-correction engine

— transonic engine

— transpiration-cooled rocket engine

— transtage engine

— traveling-wave plasma engine

— tri-chamber engine

— trim rocket engine

— triple-barreled engine

— triple-chamber engine

— turbine engine

— turboelectric engine

— turbofan engine

— turbofanramjet engine

— turbofed engine

— turbojet engine

— turboprop engine

— turbopump rocket engine

— turboram rocket engine

— turboramjet engine

— turborocket engine

— turbosupercharged engine

— twin-combustion-chamber engine

— twin-shaft engine

— two-chamber engine

— two-dimensional-ion engine

— two-propellants rocket engine

— two-row engine

— two-segment engine

— two-shaft engine

— two-spool engine

— uncooled rocket engine

— underslung engine

— underwing engine

— unreheated engine

— unrestricted-burning rocket engine

— unsegmented engine

— unsilenced engine

— unsupercharged engine

— upper-stage engine

— uprated engine

— upwind engine

— V/STOL engine

— valveless engine

— vapor-cycle-cooled engine

— vaporization-cooled engine

— variable-geometry engine

— variable-thrust engine

— vectorable engine

— vectored-thrust engine

— vee engine

— vernier engine

— vertical lift engine

— vertical-mounted engine

— vibration-free engine

— Wankel engine

— warmed engine

— water-cooled engine

— water-injection engine

— wet-sump engine

— widely-throttleable engine

— wing pod engine

— wing-mounted engine

— wing-root-buried engine

— wingtip-mounted engine

— wlndmllling engine

— wraparound boost engine

— zero-stage engine

1. двигатель; мотор

2. машина; процессор

10х8 engine

Ada engine

advanced-cycle engine

aero engine

afterburning turbofan engine

afterburning turbojet engine

air-cooled engine

aspirated engine

augmented engine

auxiliary engine

axial-flow gas turbine engine

body-submerged engine

buried engine

bypass engine

clean engine

clean-burning engine

cold engine

combat engine

combined-cycle engine

commercial engine

compression ignition engine

contrarotating propfan engine

convertible engine

convertible turboshaft/turbofan engine

core engine

cruise engine

dead engine

diesel engine

double-bypass engine

dual-expander engine

dummy engine

energy-efficient engine

environmentally friendly engine

expendable engine

Fadec controlled engine

fall-back engine

fast-revving engine

fighter engine

fixed-cycle engine

flat-four engine

flight-qualified engine

fly-by-wire engine

free turbine engine

fuel-injected engine

fuel-saving engine

full-throttle fly-by-wire engine

fuselage-mounted engine

gas turbine engine

geared engine

growth engine

heat exchanger engine

high-airflow engine

high-compression engine

high-set engine

high-thrust-to-weight engine

high-time engine

hydrocarbon-burning engine

hydrogen-fueled engine

hydromechanically controlled engine

idling engine

in-line engine

increased-thrust engine

inoperative engine

large-diameter engine

larger engine

lift engine

lift-cruise engine

liquid-fueled engine

live engine

long-life engine

low-bypass engine

low-bypass ratio engine

low-smoke engine

low-thrust/weight-ratio engine

low-slung engine

LO2/LH2 engine

LOX/LH2 engine

Mach 25 engine

methane-fueled engine

mixed engine

mixed flow engine

multishaft engine

multiflow engine

nongeared engine

operating engine

opposed-cylinder engine

podded engine

prototype engine

pure turbojet engine

pusher engine

ramjet engine

rapid-spoolup engine

rear-mounted engine

reciprocating engine

regenerative engine

rocket engine

rotary engine

running engine

scramjet engine

separate flow engine

shoulder-mounted engines

single-rotor rotary engine

six-cylinder engine

smart engine

solid-fueled engine

spark ignition engine

SST engine

stratified-charge engine

submerged engine

subsonic combustion engine

supercharged engine

supersonic combustion ramjet engine

supersonic fan engine

tail-mounted engine

tandem-fan engine

tandem-mounted engines

three flow engine

three-shaft engine

topside engine

tractor engine

trimless engine

turbine bypass engine

turbocharged engine

turbocompound engine

turbofan engine

turbojet engine

turboprop engine

turboramjet engine

turboscramjet engine

turboshaft engine

two-shaft engine

two-spool engine

two-stroke engine

UHB engine

ultra bypass engine

ultrahigh-bypass engine

unducted fan engine

unducted-type fan engine

unmixed engine

unsuppressed engine

variable cycle engine

variable stream control engine

VATOL engine

vectored engine

warmed-up engine

A a.

1 alto; elevato; (fig.) grande sommo, eminente, nobile, sublime: The house is nine metres high, la casa è alta nove metri; (fis., radio) high frequency, alta frequenza; (geogr.) high latitudes, alte latitudini; (elettr.) high tension, alta tensione; high finance, alta finanza; at a high speed, a una velocità elevata; a high wall, un muro alto; un'alta parete; a high mind, un animo nobile; a high caste, una casta alta (per es., in India)

2 ( di suono) alto, acuto: a high tone, un tono alto (o acuto)

3 ( di colore) intenso, cupo; ( di luce) forte

4 avanzato; inoltrato; pieno: high autumn, autunno inoltrato; It was high summer, era piena estate

5 ( di carne, selvaggina) frollo, stagionato; ( anche) andato a male; passato; troppo frollo

6 (fam.) alticcio; brillo

7 (fam.) euforico; gasato; su di giri (spec. per effetto della droga); fatto, impasticcato (fam.): to be high on drugs, essersi fatto

8 ( di un luogo, di un locale, e sim.) ben frequentato; che ha una buona clientela

9 ( di un fiume) in piena; gonfio

B n.

1 altura; posizione elevata; livello alto

2 ( nei giochi di carte) carta alta

3 (meteor.) area d'alta pressione; anticiclone

4 ( Borsa, fin.) prezzo massimo; livello massimo; quotazione più alta; punta; picco: highs and lows, alti e bassi, massimi e minimi ( delle quotazioni)

5 (autom., mecc.) (la) marcia più alta: to move into high, mettere (o ingranare) la quinta ( un tempo: la quarta; o comunque la marcia più alta)

6 (fam.) euforia; alto: highs and lows, alti e bassi

7 ( slang) sballo; eccitazione dovuta alla droga

8 = the high table ► sotto

C avv.

1 in alto ( anche fig.); in posizione elevata; in un grado alto; nella posizione più alta: to aim high, avere grandi mire (o aspirazioni); puntare in alto

2 forte: to play high, giocare forte; fare forti puntate

3 lussuosamente; nel lusso: to live high ( on the hog), vivere nel lusso; fare la bella vita (fig.)

● (fam.) the High = High Street (spec. a Oxford) ► sotto □ high achiever, ( a scuola, ecc.) chi ottiene grandi risultati; campione; fuoriclasse □ high altar, altar maggiore □ high and dry, (naut.) arenato; incagliato, a secco; (fig.: di persona) nei guai, in difficoltà, in braghe di tela; abbandonato □ high and low, (gente) di ogni condizione, ricchi e poveri; (avv.) dappertutto, per mari e per monti □ high-and-mighty, arrogante; prepotente □ (fam.) to be (as) high as a kite, essere ubriaco fradicio; essere completamente fatto ( di droga); ( anche) essere su di giri (o eccitatissimo) □ high-backed chair, sedia dallo schienale alto □ ( sport) high ball, palla alta □ ( ginnastica) high bar, sbarra □ (autom. USA) high beam, fascio (di luce) di profondità □ (autom.) high-beams (o high-beam headlights), (fari) abbaglianti; luci di profondità □ (fam. USA) high-binder, politico corrotto, faccendiere; ( anche) sicario □ high born (o high-born) ► highborn □ high bred (o high-bred) ► highbred □ high chair, seggiolone ( per bambini) □ High Church, «Chiesa Alta» ( la corrente più conservatrice e filocattolica della Chiesa anglicana) □ High Churchman, membro della «Chiesa Alta» □ high-class, di prim'ordine, di prima qualità; d'alta classe: high-class goods, merce di prim'ordine □ a high colour, un colorito acceso □ high-coloured, dai colori vivaci; dal colore acceso; ( di persona) colorito, florido □ (mil.) high command, comando supremo □ a high complexion, una carnagione colorita □ ( arte, pitt.) high contrast, contrasto forte □ (econ.) high cost of living, carovita □ High Court ( of Justice), Alta Corte di giustizia (in Inghilterra e Galles: giudica spec. le cause civili più complesse) □ (in GB, form.) the High Court of Parliament, il Parlamento □ (GB) high day, festività religiosa □ (fam. GB) high days and holidays, occasioni speciali □ high-density, ad alta densità: (biol.) high-density lipoprotein, (abbr. HDL) lipoproteina ad alta densità □ (econ., fin.) high earners, i percettori di redditi alti □ (market.) high-end, di fascia (o di gamma) alta: high-end computers, computer di fascia alta □ (mil.) high explosive, esplosivo ad alto potenziale; alto esplosivo □ high five, il cinque ( segno di vittoria o di saluto) □ high farming, agricoltura intensiva □ ( radio, mus.) high fidelity, alta fedeltà □ ( di registratore, ecc.) high-fidelity, ad alta fedeltà; hi-fi □ (fig.) high-flier (o high-flyer), persona (dal grande potenziale) di successo; persona capace e ambiziosa; giovane in carriera; ( anche) azienda di successo; ( Borsa) titolo che va forte □ high flying, (aeron.) che vola in alto (o ad alta quota); (fig.) capace e ambizioso, di successo □ high-flown, ( di linguaggio, ecc.) enfatico; ampolloso; altisonante □ (elettron., radio) high-frequency, ad alta frequenza □ (autom.) high gear, marcia alta; quinta ( un tempo: quarta) velocità; presa diretta; (fig.) grande velocità □ (ling.) High German, alto tedesco □ high-grade, di qualità superiore; ( di esplosivo) di elevata potenza □ high ground, altura; (fig., in una discussione, ecc.) posizione di vantaggio □ high-handed, prepotente, autoritario; tirannico □ high hat, cappello a cilindro □ high-hat, (fam. USA) persona altezzosa, snob; (agg.) altezzoso, snobistico □ high heels, tacchi alti; scarpe con tacco alto □ high hopes, forti speranze □ (econ.) high-income, ad alto reddito: high-income households, nuclei familiari ad alto reddito □ to be high in office, occupare una posizione di rilievo □ (fam. antiq.) high jinks, allegria sfrenata; baldoria □ ( sport) high jump, salto in alto □ ( sport) high jumper, saltatore in alto □ ( sport) high jumping, salto in alto □ high-keyed, (mus.) acuto; (fig.) eccitabile, nervoso □ high-level, ad alto livello; ( di personale) di grado elevato; ( di rifiuti radioattivi) ad alta attività: (comput.) high-level language, linguaggio ad alto livello; linguaggio avanzato □ high life, bella vita (fig.), vita lussuosa; ( anche) gran mondo; alta società □ high light ► highlight □ high living, bella vita (fig.); vita lussuosa □ high-maintenance (agg.), che richiede molta manutenzione; delicato; (fig. fam.: di persona) difficile, capriccioso □ (relig.) High Mass, messa grande (o solenne) □ high-mettled, ( di cavallo) focoso; ( d'uomo) coraggioso, intrepido □ high-minded, magnanimo; di nobili sentimenti □ high-mindedness, magnanimità; nobiltà d'animo □ ( di indumento) high-necked, accollato □ high noon, mezzogiorno; (fig.) apice, culmine, vertice □ (ind., chim.) high-octane, ad alto numero di ottani □ (fam.) to have a high old time, divertirsi un mondo; spassarsela □ to be high on st., andare pazzo per qc.; essere entusiasta (di fare qc.) □ to be high on drugs, essere sotto l'effetto della droga; essere completamente fatto □ to be high on whisky, essere sbronzo di whisky □ (fin.: di un investimento, ecc.) high-paying, altamente remunerativo □ high-pitched, ( di suono) acuto; ( di tetto) aguzzo, con una forte pendenza □ high point, punto alto; (fig.) momento culminante ( di uno spettacolo, ecc.); clou (franc.) □ (chim.) high polymer, polimero ad alto peso molecolare □ high-powered, ( anche elettr.) ad alta potenza; (fig.) potente, influente, dinamico, efficace; (di mansione, ecc.) di grande responsabilità □ (autom., mecc.) a high-powered engine, un motore di grande potenza; a high-powered job, un posto di grande responsabilità □ high pressure, (tecn., meteor.) alta pressione; (fig.) forte pressione □ high-pressure, (tecn.) ad alta pressione; (mecc.: di un cilindro, ecc.) che resiste alle alte pressioni; (fig.) che esercita una forte pressione, insistente, pressante; ( anche) intenso, stressante □ (comm.) high-priced, dal prezzo elevato; costoso: ( Borsa) high-priced shares, titoli pesanti □ high priest, gran sacerdote ( anche fig.) □ high priestess, gran sacerdotessa ( anche fig.) □ high-principled, di nobili (o di alti) princìpi □ high profile, (geogr.) profilo alto ( di una costa, ecc.); (fig.) alto profilo (angl.); alto livello; tono maggiore; grande rilievo (o rilevanza) □ (fig.) high-profile, di alto profilo (angl.); di primo piano, di alto livello, in tono maggiore, di tutto rilievo; (fatto) alla grande (fam.): a high-profile campaign, una campagna ( elettorale o pubblicitaria) in tono maggiore; a high-profile position, una posizione di tutto rilievo □ high-ranking, di grado elevato: the highest-ranking state officials, le massime cariche istituzionali □ high-reaching, che mira in alto; ambizioso □ ( arte) high relief, altorilievo □ (comput.) high-resolution display, schermo ad alta risoluzione □ (edil.) high-rise, (agg.) ( di un edificio) alto, a molti piani; (sost.) edificio a molti piani; piccolo grattacielo □ high-rise handlebars, manubrio alto ( di bici, ecc.) □ high-risk, ad alto rischio: high-risk patients, pazienti ad alto rischio □ high road, (antiq.) strada principale, strada maestra; (fig.) strada maestra, via (più diretta); the high road to success, la strada maestra (o la via) per il successo □ the ( moral) high road, la strada (moralmente) più corretta: The party took the moral high road and disclosed the scandal, il partito scelse la strada più corretta (o scelse la trasparenza) e rivelò lo scandalo □ (fam. USA) high roller, forte giocatore (o scommettitore); ( anche) spendaccione, chi sperpera soldi nei vizi □ high school, (in GB) scuola secondaria ( inferiore o superiore); (in USA) scuola secondaria superiore; ( balletto, equit., ecc.) alta scuola □ (naut.) the high seas, il mare aperto; gli oceani; le acque extraterritoriali □ (tur.) high season, alta stagione □ high sheriff ► sheriff □ high society, l'alta società; il gran mondo □ high-sounding, sonoro; altisonante □ high speed, alta velocità; (mecc., autom.) quarta (o quinta) velocità; presa diretta □ high-speed, ad alta velocità; ad azione rapida: (elettron.) high-speed oscilloscope, oscilloscopio ad alta velocità; high-speed relay, relè ad azione rapida □ High Speed Train (abbr. HST) power car, motrice di treno ad alta velocità □ high-spirited, allegro, brioso, vivace; ( di cavallo) focoso, ombroso □ high spirits, buonumore; euforia: to be in high spirits, essere di buonumore; essere euforico (o su di giri) □ high spot = high point ► sopra □ ( nei giochi e fig.) high stakes, posta forte; posta in gioco alta □ (ingl.) high street, corso, via principale; (fig.) il centro ( della città); (fig.) il commercio □ (ingl.) high-street (agg.), del centro, centrale; (fig.) commerciale; ( anche) per la massa: high-street shops, i negozi del centro; high-street products, prodotti per la massa □ (ingl.) high-street bank, banca di credito ordinario □ ( USA) high-strung = highly-strung ► highly □ the high table, la tavola dei professori ( nei refettori dei college); il tavolo d'onore ( in un banchetto ufficiale) □ (in GB) high tea, pasto leggero nel tardo pomeriggio, che sostituisce la cena □ (fam.) high-tech (abbr. di high-technology), high-tech; ad alto contenuto tecnologico; a tecnologia avanzata: high-tech furniture, mobili high-tech; (fin.) high-tech securities, titoli tecnologici; titoli di imprese ad alto contenuto tecnologico; high-tech industries, industrie a tecnologia avanzata □ (ind.) high-technology, ad alto contenuto tecnologico; a tecnologia avanzata □ high-temperature material, materiale resistente ad alte temperature □ (elettr.) high-tension line, linea ad alta tensione □ high tide, alta marea; (fig.) apice, culmine □ high time, (l') ora (di fare qc.); il momento giusto: It's high time ( that) we left, è ora che ce ne andiamo! □ (fig.) high-toned, elevato; nobile; (fam. USA) altolocato, snob □ ( di scarpe sportive) high-top, che coprono la caviglia □ high-tops, scarpe sportive che coprono la caviglia; (spec.) scarpe da basket □ (leg.) high treason, alto tradimento □ (fam.) high-ups ► high-up □ (elettr.) high voltage, alta tensione □ high water, alta marea □ high-water mark, livello di piena; livello dell'alta marea; (fig.) punto più alto, livello massimo, apice, culmine □ a high wind, un forte vento □ high words, parole grosse; accenti d'ira □ ( Borsa, fin.) high yielders (o high-yield securities), titoli ad alto rendimento □ (antiq. o spreg. USA) high yellow, persona mulatta di carnagione quasi bianca □ to fly high, volare in alto (o ad alta quota); (fig.) avere successo □ from on high, dall'alto; dal cielo □ (fam.) to get off [get on] one's high horse ► horse □ (di prezzi ecc.) to go high, andare su; salire □ to be in high favour ( with sb.), essere molto stimato (da q.) □ in high places, negli (o in) ambienti elevati, nelle alte sfere; ( di persona) altolocato: people in high places, (le) persone altolocate □ (relig.) the Most High, l'Altissimo; Dio □ on high, in alto; in cielo □ ( di sentimenti e sim.) to run high, essere al massimo (o alle stelle); divampare: Discontent ran high, divampava lo scontento.

— ablation time

— acceleration time

— accumulated operating time

— acquisition time

— action time

— active flight time

— actuator response time

— afterburning time

— air maneuvering time

— aircraft reaction time

— aircraft response time

— alignment time

— apparent time

— approach time

— arm time

— astronomical time

— attack-response time

— available time

— bench time

— block time

— boost-phase burning time

— bootleg flying time

— briefed time

— buildup time

— burning time

— burnout time

— burn-up time

— camera overrun time

— candle burn time

— central standard time

— characteristic time

— chock-to-chock time

— climb time

— closing response time

— closing time

— coast-down time

— coasting time

— combat firing time

— combustion time

— common time

— conversion time

— countdown time

— cruise time

— cut-in time

— cutoff time

— data-analysis time

— dead time

— decay time

— decrabbing time

— delay time

— departure time

— detection time

— disreef filling time

— dog-fight time

— down time

— dwell time

— effective burning time

— engine acceleration time

— engine change time

— engine operating time

— engine reaction time

— engine response time

— engine time

— engine-running time

— equilibrium burning time

— escape time

— exposure time

— extended coast time

— fan spinup time

— finite thrusting time

— firing time

— firing-to-impact time

— first-pilot time

— flare-to-touchdown time

— flight sector time

— flight simulator time

— flight test time

— flight time

— float time

— flotation time

— flying time

— gear retraction time

— ground elapsed time

— ground handling time

— ground launching time

— ground maneuvering time

— guidance time

— gyro runup time

— hangar time

— high flying times

— holding time

— hover burn time

— hovering time

— idling time

— ignition time

— individual flight time

— inflight time

— initial firing time

— in-jig time

— instructional flight time

— instrument scanning time

— instrument time

— instrument trainer time

— interception time

— jaunching time

— jet time

— landing time

— lead time

— leading-edge pulse time

— loiter time

— low flying times

— maintenance time

— missile response time

— mixture preparation time

— monitor full time

— motor cutoff time

— noncombat flying time

— nonfailure operating time

— on-ground time

— on-load/off-load time

— opening time

— orbit life time

— orientation time

— overall block time

— pad stay time

— perihelion time

— pilot reaction time

— pilot training time

— plus time

— postflare float time

— powered flight time

— power-on time

— prelaunch time

— pulse decay time

— pulse time

— pulse-rise time

— rack delay time

— range time

— reaction time

— readiness time

— recovery time

— relaxation time

— release time

— reloading time

— repair time

— required test time

— rescue time

— residence time

— response time

— resting time

— retention time

— rise time

— roll delay time

— route flying time

— run time

— run-down time

— running time

— running-in time

— run-up time

— runway occupancy time

— scan time

— scanning time

— scramble time

— search time

— separation time

— servicing time

— settling time

— shelf time

— simulator time

— solar time

— solo flight time

— specified terminal time

— specified time

— spot time

— standard time

— start engine time

— starting time

— stay time

— student time

— supersonic time

— survival time

— T time

— tabulated time

— tail-off time

— takeoff time

— target time

— taxi time

— test turnaround time

— thrust build-up time

— thrusting time

— time between failures

— time from abort

— time from lift-off

— time of abort

— time of collision

— time of ejection

— time of release

— time of releasing

— time on-station

— time over target

— time to altitude

— time to climb

— time to detect

— time to peak

— time to takeoff

— time to target

— time-to-go to touchdown

— tolerable exposure time

— total flight time

— total rendezvous time

— total residence time

— total time flown

— total trip time

— touchdown time

— track time

— transfer time

— transit time

— transportation delay time

— trouble shooting time

— turnaround time

— universal time

— up time

— warm-up time

— warning time

— weather time

— web time

— X time

— zero time

— zero-g time

— zero-gravity time

1) время || измерять [определять\] время; отмечать время; хронометрировать

2) период [интервал\] времени

3) момент времени

4) срок; длительность, продолжительность

5) темп; такт

6) хронировать; синхронизировать; осуществлять привязку по времени

7) регулировать взаимное положение фаз периодических процессов

1 adj

MECH ENG elevado, máximo

2 n

GEOL área anticiclónica f

METEO alta f, área anticiclónica f

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SUBJECT AREA: Steam and internal combustion engines

[br]

[br]

[br]

Porter graduated from Hamilton College, New York, in 1845, read law in his father's office, and in the autumn of 1847 was admitted to the Bar. He practised for six or seven years in Rochester, New York, and then in New York City. He was drawn into engineering when aged about 30, first through a client who claimed to have invented a revolutionary type of engine and offered Porter the rights to it as payment of a debt. Having lent more money, Porter saw neither the man nor the engine again. Porter followed this with a similar experience over a patent for a stone dressing machine, except this time the machine was built. It proved to be a failure, but Porter set about redesigning it and found that it was vastly improved when it ran faster. His improved machine went into production. It was while trying to get the steam engine that drove the stone dressing machine to run more smoothly that he made a discovery that formed the basis for his subsequent work.

Porter took the ordinary Watt centrifugal governor and increased the speed by a factor of about ten; although he had to reduce the size of the weights, he gained a motion that was powerful. To make the device sufficiently responsive at the right speed, he balanced the centrifugal forces by a counterweight. This prevented the weights flying outwards until the optimum speed was reached, so that the steam valves remained fully open until that point and then the weights reacted more quickly to variations in speed. He took out a patent in 1858, and its importance was quickly recognized. At first he manufactured and sold the governors himself in a specially equipped factory, because this was the only way he felt he could get sufficient accuracy to ensure a perfect action. For marine use, the counterweight was replaced by a spring.

Higher speed had brought the advantage of smoother running and so he thought that the same principles could be applied to the steam engine itself, but it was to take extensive design modifications over several years before his vision was realized. In the winter of 1860–1, J.F. Allen met Porter and sketched out his idea of a new type of steam inlet valve. Porter saw the potential of this for his high-speed engine and Allen took out patents for it in 1862. The valves were driven by a new valve gear designed by Pius Fink. Porter decided to display his engine at the International Exhibition in London in 1862, but it had to be assembled on site because the parts were finished in America only just in time to be shipped to meet the deadline. Running at 150 rpm, the engine caused a sensation, but as it was non-condensing there were few orders. Porter added condensing apparatus and, after the failure of Ormerod Grierson \& Co., entered into an agreement with Joseph Whitworth to build the engines. Four were exhibited at the 1867 Paris Exposition Universelle, but Whitworth and Porter fell out and in 1868 Porter returned to America.

Porter established another factory to build his engine in America, but he ran into all sorts of difficulties, both mechanical and financial. Some engines were built, and serious production was started c. 1874, but again there were further problems and Porter had to leave his firm. High-speed engines based on his designs continued to be made until after 1907 by the Southwark Foundry and Machine Company, Philadelphia, so Porter's ideas were proved viable and led to many other high-speed designs.

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1. (атмосферный) летательный аппарат [аппараты], воздушное судно [суда]; самолет(ы); вертолет(ы);

см. тж. airplane,

2. авиация/ авиационный; бортовой <об оборудовании ЛА>

4-D aircraft

4-D equipped aircraft

9-g aircraft

ADF aircraft

advanced-technology aircraft

adversary aircraft

aerobatic aircraft

aft-tail aircraft

aggressor aircraft

agile aircraft

agricultural aircraft

air defence aircraft

air-refuellable aircraft

air-to-ground aircraft

airborne early warning and control aircraft

alert aircraft

all-digital aircraft

all-training aircraft

all-electric aircraft

all-metal aircraft

all-new aircraft

all-out stealth aircraft

all-weather aircraft

amateur built aircraft

amphibious aircraft

antisubmarine warfare aircraft

around-the-world aircraft

artificial-stability aircraft

asymmetric aircraft

attack aircraft

attrition aircraft

augmented aircraft

automated aircraft

backside aircraft

BAI aircraft

balanced aircraft

battle-damaged aircraft

battle-tolerant aircraft

battlefield aircraft

bulbous-nosed aircraft

buoyant quad-rotor aircraft

bush aircraft

business aircraft

business-class aircraft

calibrated pace aircraft

canard aircraft

canard controlled aircraft

canard-configured aircraft

canard-winged aircraft

cargo aircraft

cargo-capable aircraft

carrier aircraft

carrier-based aircraft

carrier-qualified aircraft

CAS aircraft

centerstick aircraft

centerstick controlled aircraft

Christmas tree aircraft

class IV aircraft

clear weather reconnaissance aircraft

close-coupled canard aircraft

coated aircraft

combat air patrol aircraft

combat training aircraft

combat-damaged aircraft

combat-loaded aircraft

combi aircraft

combustible fuel aircraft

commuter aircraft

composite material aircraft

composite-built aircraft

composite-wing aircraft

computer-generated aircraft

conceptual aircraft

conceptual design aircraft

conflicting aircraft

control reconfigurable aircraft

control-by-wire aircraft

conventional tailled aircraft

conventional take-off and landing aircraft

conventional variable-sweep aircraft

conventionally designed aircraft

corporate aircraft

counter insurgency aircraft

cropspray aircraft

cropspraying aircraft

cruise matched aircraft

cruise-designed aircraft

CTOL aircraft

current-generation aircraft

damage tolerant aircraft

day-only aircraft

day/night aircraft

de-iced aircraft

defence-suppression aircraft

delta-wing aircraft

demonstrator aircraft

development aircraft

developmental aircraft

divergence prone aircraft

double-deck aircraft

drug interdiction aircraft

drug-smuggling aircraft

dual-capable aircraft

ducted-propeller aircraft

dynamically stable aircraft

dynamically unstable aircraft

Earth resources research aircraft

Earth resources survey aircraft

ejector-powered aircraft

Elint aircraft

EMP-hardened aircraft

ex-airline aircraft

FAC aircraft

fake aircraft

fan-in-wing aircraft

fan-powered aircraft

firefighting aircraft

fixed-cycle engine aircraft

fixed-landing-gear aircraft

fixed-planform aircraft

fixed-wing aircraft

flexible aircraft

flight inspection aircraft

flight loads aircraft

flight refuelling aircraft

flight test aircraft

flightworthy aircraft

fly-by-wire aircraft

flying-wing aircraft

forgiving aircraft

forward air control aircraft

forward-swept-wing aircraft

four-dimensional equipped aircraft

freely flying aircraft

freighter aircraft

friendly aircraft

front-line aircraft

FSD aircraft

fuel efficient aircraft

fuel-hungry aircraft

full-scale aircraft

full-scale development aircraft

full-size aircraft

fully-capable aircraft

fully-tanked aircraft

gap filler aircraft

gas turbine-powered aircraft

ground-hugging aircraft

gull-winged aircraft

heavy-lift aircraft

high-Mach aircraft

high-alpha research aircraft

high-cycle aircraft

high-demand aircraft

high-drag aircraft

high-dynamic-pressure aircraft

high-flying aircraft

high-life aircraft

high-performance aircraft

high-speed aircraft

high-tail aircraft

high-technology aircraft

high-thrust aircraft

high-time aircraft

high-wing aircraft

high-winged aircraft

highest cycle aircraft

highest flight-cycle aircraft

highly agile aircraft

highly augmented aircraft

highly glazed aircraft

highly maneuverable aircraft

highly unstable aircraft

holding aircraft

home-based aircraft

home-built aircraft

hovering aircraft

hydrocarbon-fueled aircraft

hydrogen fueled aircraft

hypersonic aircraft

ice-cloud-generating aircraft

icing-research aircraft

idealized aircraft

IFR-equipped aircraft

in-production aircraft

interrogating aircraft

intratheater airlift aircraft

intratheater lift aircraft

intruder aircraft

inventory aircraft

jamming aircraft

jet aircraft

jet-flap aircraft

jet-flapped aircraft

jet-powered aircraft

jet-propelled aircraft

joined-wing aircraft

JTIDS aircraft

jump aircraft

K/s like aircraft

kit-based aircraft

kit-built aircraft

land aircraft

land-based aircraft

large aircraft

large-production-run aircraft

launch aircraft

launching aircraft

lead aircraft

leading aircraft

leased aircraft

Level 1 aircraft

lift plus lift-cruise aircraft

light aircraft

light-powered aircraft

lighter-than-air aircraft

long-haul aircraft

long-winged aircraft

longitudinally unstable aircraft

look-down, shoot-down capable aircraft

low-boom aircraft

low-cost aircraft

low-observability aircraft

low-observable aircraft

low-powered aircraft

low-rate production aircraft

low-RCS aircraft

low-speed aircraft

low-time aircraft

low-to-medium speed aircraft

low-wing aircraft

low-winged aircraft

lowest weight aircraft

Mach 2 aircraft

man-powered aircraft

manned aircraft

marginally stable aircraft

mechanically-controlled aircraft

mechanically-signalled aircraft

medevac-equipped aircraft

microlight aircraft

microwave-powered aircraft

mid-wing aircraft

mid-winged aircraft

minimum weight aircraft

mission aircraft

mission-ready aircraft

multibody aircraft

multimission aircraft

multipropeller aircraft

multipurpose aircraft

narrow-bodied aircraft

naturally unstable aircraft

neutrally stable aircraft

new-built aircraft

new-technology aircraft

night fighting aircraft

night-capable aircraft

night-equipped aircraft

nonagile aircraft

nonalert aircraft

nonautomated aircraft

1950s-vintage aircraft

nonflying test aircraft

nonpressurized aircraft

nonstealth aircraft

nontransponder-equipped aircraft

nonpropulsive-lift aircraft

northeastwardly launching aircraft

nuclear-hardened aircraft

nuclear-strike aircraft

oblique-wing aircraft

ocean patrol aircraft

off-the-shelf aircraft

offensive aircraft

older-generation aircraft

out-of-production aircraft

outbound aircraft

pace aircraft

parasol-winged aircraft

parked aircraft

partial mission-capable aircraft

patrol aircraft

piston aircraft

piston-engine aircraft

piston-powered aircraft

piston-prop aircraft

pivoting oblique wing aircraft

point-design aircraft

powered-lift aircraft

precision strike aircraft

probe-equipped aircraft

production aircraft

production-line aircraft

proof-of-concept aircraft

prop-rotor aircraft

propeller aircraft

propeller-powered aircraft

propulsive-lift aircraft

prototype aircraft

public-transport aircraft

purpose-built aircraft

pusher aircraft

pusher-propelled aircraft

quad-rotor aircraft

radar test aircraft

RAM-treated aircraft

ready aircraft

rear-engined aircraft

receiving aircraft

recent-technology aircraft

reconnaissance aircraft

refueling aircraft

remanufactured aircraft

research aircraft

retrofit aircraft

Rogallo-winged aircraft

rollout aircraft

rotary-wing aircraft

rotary-winged aircraft

rotodome-equipped aircraft

safely spinnable aircraft

scaled-down aircraft

scaled-up aircraft

scissor-wing aircraft

sea-based aircraft

second-hand aircraft

self-repairing aircraft

sensor-carrying aircraft

short range aircraft

short takeoff and vertical landing aircraft

short-coupled flying wing aircraft

short-haul aircraft

side-inlet aircraft

sideslipping aircraft

silent aircraft

single engine aircraft

single-pilot aircraft

single-service aircraft

sized aircraft

sized optimized aircraft

slender-delta aircraft

SLEPed aircraft

small-tailed aircraft

smuggler aircraft

solar-powered aircraft

special operations aircraft

spin-proof aircraft

spinning aircraft

statically stable aircraft

statically unstable aircraft

stealth aircraft

stealthy aircraft

STOL aircraft

stopped-rotor aircraft

stored aircraft

STOVL aircraft

straight-tube aircraft

straight-wing aircraft

straight-winged aircraft

stretched aircraft

strike aircraft

strike-control aircraft

sub-scale aircraft

submarine communications relay aircraft

sunken aircraft

superaugmented aircraft

supersonic cruise aircraft

supportable aircraft

surveillance aircraft

swing-wing aircraft

T-tail aircraft

tactical aircraft

tactical-type aircraft

tail-aft aircraft

tail-first aircraft

tailless aircraft

tailwheel aircraft

tandem-seat aircraft

tandem-wing aircraft

target-towing aircraft

TCAS-equipped aircraft

test aircraft

threat aircraft

three-pilot aircraft

three-surface aircraft

thrust-vector-control aircraft

tilt-fold-rotor aircraft

tilt-proprotor aircraft

tilt-rotor aircraft

tilt-wing aircraft

top-of-the-range aircraft

trailing aircraft

trainer cargo aircraft

trajectory stable aircraft

transoceanic-capable aircraft

transonic aircraft

transonic maneuvering aircraft

transport aircraft

transport-size aircraft

trimmed aircraft

trisurface aircraft

tug aircraft

turbine-powered aircraft

turboprop aircraft

turbopropeller aircraft

TVC aircraft

twin-aisle aircraft

twin-engined aircraft

twin-fuselage aircraft

twin-jet aircraft

twin-tailed aircraft

twin-turboprop aircraft

two-aircrew aircraft

two-crew aircraft

two-pilot aircraft

two-place aircraft

ultrahigh-bypass demonstrator aircraft

ultralight aircraft

undesignated aircraft

unpressurized aircraft

unslatted aircraft

utility aircraft

V/STOL aircraft

variable-stability aircraft

VATOL aircraft

vector thrust controlled aircraft

vectored aircraft

vectored thrust aircraft

versatile aircraft

vertical attitude takeoff and landing aircraft

VFR aircraft

violently maneuvering aircraft

VTOL aircraft

water tanker aircraft

weapons-delivery test aircraft

weight-shift aircraft

well-behaved aircraft

wide-body aircraft

wing-in-ground effect aircraft

X aircraft

X-series aircraft

X-wing aircraft

yaw-vane-equipped aircraft

SUBJECT AREA: Steam and internal combustion engines

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Allen was taken to the United States from England when he was 12 years old. He became an engineer on the Curlew, a freight boat running between New York and Providence. A defect which caused the engine to race in rough weather led Allen to invent a new valve gear, but he found it could not be fitted to the Corliss engine. In 1856 he patented an improved form of valve and operating gear to reduce back-pressure in the cylinder, which was in fact the reverse of what happened in his later engines. In 1860 he repaired the engines of a New York felt-hat manufacturer, Henry Burr, and that winter he was introduced to Charles Porter. Porter realized the potential of Allen's valves for his idea of a high-speed engine, and the Porter-Allen engine became the pioneer of high-speed designs.

Porter persuaded Allen to patent his new valves and two patents were obtained in 1862. These valves could be driven positively and yet the travel of the inlet could be varied to give the maximum expansion at different cut-offs. Also, the valves allowed an exceptionally good flow of steam. While Porter went to England and tried to interest manufacturers there, Allen remained in America and continued work on the engine. Within a few years he invented an inclined watertube boiler, but he seemed incapable of furthering his inventions once they had been placed on the market. Although he mortgaged his own house in order to help finance the factory for building the steam engine, in the early 1870s he left Porter and built a workshop of his own at Mott Haven. There he invented important systems for riveting by pneumatic machines through both percussion and pressure which led into the production of air compressors and riveting machines.

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1) літальний апарат, ЛА; повітряне судно, ПС; літак; вертоліт, гелікоптер; проф. борт

2) збірн. авіація

•

- abandoned aircraft

SUBJECT AREA: Electricity, Ports and shipping

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The youngest son of the Earl of Rosse, he came from a family well known in scientific circles, the six boys growing up in an intellectual atmosphere at Birr Castle, the ancestral home in Ireland, where a forge and large workshop were available to them. Charles, like his brothers, did not go to school but was educated by private tutors of the character of Sir Robert Ball, this type of education being interspersed with overseas holiday trips to France, Holland, Belgium and Spain in the family yacht. In 1871, at the age of 17, he went to Trinity College, Dublin, and after two years he went on to St John's College, Cambridge. This was before the Engineering School had opened, and Parsons studied mechanics and mathematics.

In 1877 he was apprenticed to W.G.Armstrong \& Co. of Elswick, where he stayed for four years, developing an epicycloidal engine that he had designed while at Cambridge. He then moved to Kitson \& Co. of Leeds, where he went half shares in a small experimental shop working on rocket propulsion for torpedoes.

In 1887 he married Katherine Bethell, who contracted rheumatic fever from early-morning outdoor vigils with her husband to watch his torpedo experiments while on their honeymoon! He then moved to a partnership in Clarke, Chapman \& Co. at Gateshead. There he joined the electrical department, initially working on the development of a small, steam-driven marine lighting set. This involved the development of either a low-speed dynamo, for direct coupling to a reciprocating engine, or a high-speed engine, and it was this requirement that started Parsons on the track of the steam turbine. This entailed many problems such as the running of shafts at speeds of up to 40,000 rpm and the design of a DC generator for 18,000 rpm. He took out patents for both the turbine and the generator on 23 April 1884. In 1888 he dissolved his partnership with Clarke, Chapman \& Co. to set up his own firm in Newcastle, leaving his patents with the company's owners. This denied him the use of the axial-flow turbine, so Parsons then designed a radial-flow layout; he later bought back his patents from Clarke, Chapman \& Co. His original patent had included the use of the steam turbine as a means of marine propulsion, and Parsons now set about realizing this possibility. He experimented with 2 ft (61 cm) and 6 ft (183 cm) long models, towed with a fishing line or, later, driven by a twisted rubber cord, through a single-reduction set of spiral gearing.

The first trials of the Turbinia took place in 1894 but were disappointing due to cavitation, a little-understood phenomenon at the time. He used an axial-flow turbine of 2,000 shp running at 2,000 rpm. His work resulted in a far greater understanding of the phenomenon of cavitation than had hitherto existed. Land turbines of up to 350 kW (470 hp) had meanwhile been built. Experiments with the Turbinia culminated in a demonstration which took place at the great Naval Review of 1897 at Spithead, held to celebrate Queen Victoria's Diamond Jubilee. Here, the little Turbinia darted in and out of the lines of heavy warships and destroyers, attaining the unheard of speed of 34.5 knots. The following year the Admiralty placed their first order for a turbine-driven ship, and passenger vessels started operation soon after, the first in 1901. By 1906 the Admiralty had moved over to use turbines exclusively. These early turbines had almost all been direct-coupled to the ship's propeller shaft. For optimum performance of both turbine and propeller, Parsons realized that some form of reduction gearing was necessary, which would have to be extremely accurate because of the speeds involved. Parsons's Creep Mechanism of 1912 ensured that any errors in the master wheel would be distributed evenly around the wheel being cut.

Parsons was also involved in optical work and had a controlling interest in the firm of Ross Ltd of London and, later, in Sir Howard Grubb \& Sons. He he was an enlightened employer, originating share schemes and other benefits for his employees.

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