They were designed and built in the early 1960's and the first flight of an SR-71 took place on 22 December 1964
Boeing
What is SR71 auto insurance
The SR 71 was a very secret high speed, high altitude reconnaisance aircraft. Only 32 were built, at enormous cost.
Black
3.5
Stratosphere
2193 mph
2200 mph
It is the Lockheed SR-71 "Blackbird", a reconnaissance aircraft.
The SR-71 is far faster.
1599 is when it was built
If you are refering to the SR71 blackbird, the military plane, it was designed and built by Lockheed Martin. The SR-71 Blackbird was built by the famous Lockhead "Shunk Works" Heading up the team was Clarence L. "Kelly" Johnson one of aviation's most important aircraft designers.