| 释义 |
jet propulsion
[jet n.3]
The ejection of a usu. high-speed jet of gas (or liquid) as a source of propulsive power, esp. for aircraft.
1867Ann. Rep. Aëronaut. Soc. 50 In spite of the costly experiments..made to revive the system of jet propulsion, it was clear to him that the screw propeller must be much superior. 1877C. B. Mansfield Aerial Navigation ii. xiii. 453 One of the great advantages attending the system of pump or jet propulsion in the air is that, however the force be generated, the direction in which it is applied may be instantly altered, without shifting the position of the actual instrument of motion. 1886Ann. Rep. Aëronaut. Soc. 67 (heading) Jet propulsion for aëronautical purposes. 1892J. H. Cotterill Appl. Mech. (ed. 3) 572 The efficiency of jet propulsion [of ships] can hardly be estimated as greater than ·33. 1920Chambers's Jrnl. June 415/1 In the case of life-boats liable to ground on sandbanks..jet-propulsion has obvious advantages. 1935Balmer & Wylie After Worlds Collide iv. 75 The most energetic members of the colony were working upon a small metal jet-propulsion [air]ship. 1944Time 24 Jan. 66 This..drawing illustrates..the operation of a propellerless, jet-propulsion airplane. 1945Daily Express 4 June 4/8 America's car manufacturers are secretly experimenting to produce the first jet-propelled car, using exhaust gases from the present car to boost power by jet propulsion. 1953J. Y. Cousteau Silent World xi. 106 The octopus was downright terrified... It made off by slow jet propulsion, exuding spurts of its famous ink. 1962F. I. Ordway et al. Basic Astronautics x. 392 Jet propulsion may be divided into two categories: ducted or air-breathing engines and rocket engines.
So jet-propelled a., having or employing a means of jet propulsion; also fig., very fast, frenzied; also (as a back-formation) jet-propel v. trans. (chiefly fig.).
[1867J. Bourne Treat. Screw Propeller (new ed.) p. cxix/3 Johnson's jet propeller.] 1877W. H. White Man. Naval Archit. xiv. 612 Jet-propelled vessels, when moving ahead at full speed, derive their steering power from the reaction of the water in the wake upon the rudder. 1904R. Kennedy Mod. Engines & Power Generators I. ii. 104 The Viper and Vixen, twin screw vessels of about the same tonnage..were built as fair competitors with the jet propelled Waterwitch. 1922Flight XIV. 276/2 Many of the inventions imagined by Jules Verne..have already been realised, so who shall say that the design for a jet-propelled monoplane seaplane described by M. Maurice Armende..will not materialise—some day? 1936Daily Sketch 17 Nov. 13/4 In visualising a jet-propelled aeroplane of the future, the mind immediately thinks of a large hole in the tail, from which would come a blast of whatever gases were being released. 1944A. Huxley Let. 9 July (1969) 507 One can be safe in betting that, within ten years, there will be rockets, or jet-propelled flying bombs,..capable of flying any distance up to five thousand miles. 1945F. Whittle in Proc. Inst. Mech. Engin. CLII. 422/2 At the beginning of 1940 the Air Ministry..began to work on the assumption that there was a good chance of getting jet propelled fighter aircraft into production for use in the war. 1947Sci. News IV. 35 When Sir Malcolm Campbell makes his next attempt on the world's speed record, he will be using a true ‘jet-propelled’ speedboat. 1949Sat. Rev. (U.S.) 25 June 17/2 It was that courage..that jet-propelled her onward and upward to stardom and marriage to Florenz Ziegfeld, Jr. 1950in Amer. Speech (1956) XXXI. 285 They have learned to jet-propel bodies, but they haven't taken the first step in jet-propelling the human spirit. 1954‘N. Blake’ Whisper in Gloom i. i. 15 If the jet-propelled craft he had built failed to jet-propel itself. 1958A. Huxley Let. 22 June (1969) 850 Time, as one advances in life, seems to become jet propelled. 1959Encounter Aug. 35 He was lit up and jet-propelled by a sort of crazy, electric frenzy. 1960Times 6 Aug. 9/5 On the same disc..is Mendelssohn's concerto which Heifetz carries by assault. He lays into the triplets of the first movement.., plays the slow movement with a fair amount of elbow-power, and jet-propels the fairies through the last. 1962Economist 19 May 672/1 Dr Nkrumah's phrase about achieving a ‘jet-propelled’ rate of economic growth. 1969Daily Tel. 13 Feb. 22/8 The book conveys the period of music-making in the 1920s and 1930s and its air of domesticity far removed from today's jet-propelled bustle. |