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词汇
变后掠翼飞机
释义
变后掠翼飞机
biàn hòu lüě yì fēi jī
在飞行中机翼的后掠角可以改变的飞机。后掠角变化在20~70°范围内。飞行中适时改变后掠角大小,可适应高速和低速飞行的要求。飞机作超声速飞行时,后掠角变大,能延迟激波的产生和波阻的减小,保证良好的飞行性能;起飞、着陆和低速飞行时,后掠角变小,可缩短起飞和着陆滑跑距离,增大航程和续航时间。但机翼转动的构造复杂,质量大。
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free surface showing
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更新时间:2024/12/23 6:03:53