| 单词 | hump speed |
| 释义 | > as lemmashump speed hump speed n. Aeronautics the speed of a seaplane or hovercraft at which the drag due to the water is a maximum (cf. quots. 19142, 1935 at sense 2d). ΘΚΠ society > travel > travel by water > action or motion of vessel > [noun] > speed in specific manner or conditions surface speed1859 sea-speed1887 stern speed1904 hump speed1915 society > travel > air or space travel > specific movements or positions of aircraft > aerodynamic forces and concepts > [noun] > speeds in relation to aerodynamic effects hump speed1915 reversal speed1934 1915 Techn. Rep. Advisory Comm. Aeronaut. 1913–14 369 It was not practicable to fit air-holes to the second step, but it is probable that a slight reduction of power at the ‘hump’ speed could be obtained by this means in smooth water. 1938 Jrnl. Royal Aeronaut. Soc. 42 559 The relative distance and time required to reach hump speed depend largely on the value of the accelerating force at high speeds. 1962 New Scientist 24 May 388/1 As a hovercraft accelerates from rest there is a so-called ‘hump-speed’ (about 14–18 knots) above which the drag suddenly drops. < as lemmas |
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