| 单词 | head resistance |
| 释义 | > as lemmashead resistance head resistance n. Shipbuilding and Aeronautics the resistance which arises from the impact of the forward surfaces of a moving ship, plane, etc., with the water or air through which it moves; cf. drift n. 2e(a). ΘΚΠ the world > the earth > water > flow or flowing > wave > [noun] > retarding force head resistance1800 wave resistance1889 1800 J. Charnock Hist. Marine Archit. I. viii. 115 Where the head resistance of the fluid is once overcome, the collateral friction being very trifling, it follows, that the longer the vessel the greater quantity of impelling power can be used. 1891 Railroad & Engin. Jrnl. 65 465/1 The head or hull resistance will probably be found to be the chief element which will limit the possible speed of flying machines. 1909 Westm. Gaz. 1 July 4/1 Allowing a coefficient of ·3 for the pointed ends, the total head-resistance would be reduced to 3,324 lb. 2001 C. Sinnott RAF & Aircraft Design v. 115 Eight guns would give a lot of head resistance. < as lemmas |
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