the obstacle to supersonic flight posed by such factors as increased drag and reduced controllability, which occur when aircraft not specially…
| 单词 | θ207157 |
| 释义 | society > travel > air or space travel > specific movements or positions of aircraft > aerodynamic forces and concepts > [noun] > limitations on speed (3) sound barrier1939 the obstacle to supersonic flight posed by such factors as increased drag and reduced controllability, which occur when aircraft not specially… thermal barrier1951 = heat barrier n. at heat, n. compounds 2. heat barrier1953 the limitation on the speed of aircraft, etc., due to heating by air friction. |
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