3.5
2200 mph
Black
The SR-71 Blackbird is 2,193 miles per hour fast or Mach 3, three times faster than the speed of sound.
2193 mph
Stratosphere
The SR-71 Blackbird was introduced into service in 1966.
It is the Lockheed SR-71 "Blackbird", a reconnaissance aircraft.
The maximum speed of a SR71 is 2,200 mph at 80,000 ft.
SR71 Blackbird Model M-21: maximum speed: 2211miles/h Generally, the given answer for all models of the SR71 is: "In excess of Mach 3", or more than three times the speed of sound. see related links below for more info
No it just flew very high to avoid radar.
No it is an advanced, long range, Mach 3+ strategic reconnaissance aircraft.