| 单词 | spiral instability |
| 释义 | > as lemmasspiral instability spiral instability n. Aeronautics an instability in which an aeroplane undergoing a banked turn tends to enter a descending spiral as a result of sideslipping and reduction of the radius of turn. ΘΚΠ society > travel > air or space travel > a means of conveyance through the air > aeroplane > qualities and parameters of aircraft > [noun] > spiral stability or instability spiral instability1914 spiral stability1947 spiral divergence1949 1914 L. Bairstow et al. Rep. & Mem. Advisory Comm. for Aeronautics No. 77. 168 A machine which is liable to spiral instability when gyroscopic actions are eliminated, cannot become stable owing to gyroscopic action of the propeller and engine. 1970 T. Hacker Flight Stability & Control vii. 162 The elimination of spiral instability..is achieved by the constraint of the angle of bank ϕ, obviously in addition to correcting the heading. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。