| 单词 | variable sweep | 
| 释义 | > as lemmasvariable sweep   variable sweep  n. Aeronautics sweep (sense  15) that can be varied during flight according to requirements; usually attributive. ΘΚΠ society > travel > air or space travel > a means of conveyance through the air > aeroplane > parts of aircraft > 			[adjective]		 > types of wing flappinga1857 cambered1909 swept-back1914 slotted1921 crustacean1928 cranked1939 unswept1946 variable sweep1954 Gothic1959 ogival1962 1954    Economist 11 Sept. 12/3  				Variable sweep. After take-off with wings only partially swept, means are provided to sweep them back more sharply in flight. Strictly experimental. 1965    New Scientist 22 Apr. 217/1  				The development of the variable-sweep wing in collaboration with the French might lead to a load-carrier of outstanding performance. 1966    Economist 22 Jan. 330/1  				Massive, variable-sweep aircraft whose wings pivot around stanchions as thick as tree-trunks. 1978    D. Küchemann Aerodynamic Design of Aircraft iv. 120  				E. von Holst flew models with various arrangements of variable sweep. < as lemmas  | 
	
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