SR-71 and M-21 were developed the same time by the same team.

SR-71 and M-21 were developed the same time by the same team.

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送交者: steven 于 2010-08-11, 18:44:38:

回答: I know that. I am interested in SR-71 because M-21/D-21 is a failed project. 由 year2226 于 2010-08-11, 18:41:12:

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)