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The SR-71's J58 engines were most efficient at around Mach 3.2, since only 20% of the thrust was created by the engines, while the remaining 80% was done by Ramjet thrust where the spikes in front of the engine intakes would create a supersonic shockwave and would be fed into the outer part of the engine by the spikes retracting about 20 inches.
Max speed: Mach 3.4 (2,244 mph) at 80,000+ ft
Records:
absolute speed record of 1905.80993 knots (2,193.1669 mph) and
"absolute altitude record" of 85,068.997 feet
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How fast did the sr71 blackbird fly?
2200 mph
How fast does the SR71 Blackbird travel?
3.5
What layer of atmosphere did the SR71 Blackbird fly in?
Stratosphere
What layer of atmosphere did the SR71-Blackbird fly in?
the stratosphere!
How fast does a sr71 blackbird go?
About 3 times the speed of sound. (3 mach)
How fast did the SR-71 Blackbird airplane fly?
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
What colour is the SR71 Blackbird?
Black
How fast is the SR71 Blackbird?
The SR-71 Blackbird is 2,193 miles per hour fast or Mach 3, three times faster than the speed of sound.
What is the top speed of the the sr71 blackbird?
2193 mph
What year was the sr71 blackbird commmissioned into service?
The SR-71 Blackbird was introduced into service in 1966.
What is a sr71?
It is the Lockheed SR-71 "Blackbird", a reconnaissance aircraft.
How fast can a SR 71 Blackbird fly?
They can fly at over Mach 3.5 .
