In practice flights it was unpainted but the flat black paint actually flies 75 degrees Fahrenheit cooler than an unpainted airframe and also the black paint has some radar absorbing qualities.
Because dull black is the best colour for spy aircraft
What is SR71 auto insurance
Black
3.5
Boeing
the stratosphere!
2200 mph
2193 mph
Stratosphere
It is the Lockheed SR-71 "Blackbird", a reconnaissance aircraft.
The SR-71 is far faster.
No it just flew very high to avoid radar.