乐见成功，美国是我们的家园。

https://www.google.com/search?q=US+flight+x-59&sca_esv=b76488d702878571&sxsrf=AE3TifP4jSTGiFcKufTCltZ7Ds8xBUCM9w%3A1753025257726&source=hp&ei=6Qp9aPHsKdbV5NoPjv_m4Qk&iflsig=AOw8s4IAAAAAaH0Y-ZbzGrZYRF-mkUcD7rhGJMuWM-eX&ved=0ahUKEwixhZH-38uOAxXWKlkFHY6_OZwQ4dUDCBo&uact=5&oq=US+flight+x-59&gs_lp=Egdnd3Mtd2l6Ig5VUyBmbGlnaHQgeC01OTIFECEYoAEyBRAhGKABSO-iAVAAWI6VAXADeACQAQCYAXugAaoKqgEEMTIuM7gBA8gBAPgBAZgCEqAC4grCAgcQIxjwBRgnwgINECMY8AUYgAQYJxiKBcICBBAjGCfCAgsQLhiABBixAxiDAcICDhAuGIAEGLEDGIMBGIoFwgILEAAYgAQYsQMYgwHCAggQABiABBixA8ICDhAuGIAEGLEDGNEDGMcBwgIKECMYgAQYJxiKBcICDhAAGIAEGLEDGIMBGIoFwgIOEC4YgAQYxwEYjgUYrwHCAgQQABgDwgIOEC4YgAQY0QMYxwEYyQPCAgUQABiABMICCxAuGIAEGNEDGMcBwgILEC4YgAQYxwEYrwHCAgoQABiABBixAxgNwgIHEAAYgAQYDcICEBAAGIAEGLEDGIMBGIoFGA3CAgYQABgWGB7CAggQABiABBiiBMICBRAAGO8FmAMAkgcEMTQuNKAH9meyBwQxMS40uAfXCsIHBjIuMTIuNMgHKw&sclient=gws-wiz#fpstate=ive&vld=cid:cb56b418,vid:Jlx4gauKVSQ,st:0

所有跟帖： 

• 客机达到超音速不难，上世纪英法协和客机已达到两倍音速。难度在降低成本其次才是冲破音速时的音爆。美航司没引进协和成本是主因 -天青水蓝- ♂ (0 bytes) () 07/20/2025 postreply 08:42:32

• 20多年前英航协和从伦敦到纽约只要三个小时，单程票价就要过千镑，正常往返票才不到四百镑。客流不足导致英法航最后也停飞协和 -天青水蓝- ♂ (0 bytes) () 07/20/2025 postreply 08:48:44