速度M1.4, 比M2的协和大幅降低,但减弱了噪音,会比较容易被接受。现在还是亚音速试飞,要等超音速试飞才知实际降噪效果
本帖于 2025-10-29 07:53:32 时间, 由普通用户 天青水蓝 编辑
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