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originally posted by: Zaphod58
a reply to: OccamsRazor04
Yes. The SR-71 was announced in July of 1964 and first flight was in December of 1964. The first prototype was delivered in October.
originally posted by: Zaphod58
a reply to: MystikMushroom
The SR-71 didn't fly operationally until after the announcement of its existence. The A-12 had been flying prior to that. They are different aircraft.
originally posted by: Zaphod58
a reply to: _Del_
Not really. If you look at the F-15C and F-15E there are some significant differences between the two. Just as there were between the A-12 and SR-71.