送交者: year2226 于 2010-08-11, 18:41:12:

回答: We used SR-71 to simulate Satellite pass through in early 90s :) 由 steven 于 2010-08-11, 18:04:28:

• SR-71 and M-21 were developed the same time by the same team. (无内容) - steven (0 bytes) 2010-08-11, 18:44:38 (473724)
  • so why d-21 failed, but sr-71 sounds so successful ? (无内容) - year2226 (0 bytes) 2010-08-11, 19:02:21 (473732)
    • D-71 was too complicated for its time. - steven (45 bytes) 2010-08-11, 20:05:48 (473751)

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