The SR-71's maximum crusing altitude was just shy of 100,000 feet, about 18.9 miles. It's maximum speed exceeded 3.3 times the speed of sound, around 2511 miles per hour. Both of these stats were incrediable for the time it was created.
2200 mph
Stratosphere
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
It was designed to be a long range recon jet. but it really deepens on how fast its flying and at what altitude.
The SR-71 Blackbird primarily operated in the stratosphere, which is the second major layer of Earth's atmosphere. This layer is characterized by high altitudes, low air pressure, and stable atmospheric conditions - ideal for high-speed, high-altitude flight capabilities of the SR-71.
They can fly at over Mach 3.5 .
depends on the altitude, payload, and how fast its flying
In 1990 the SR-71 went from the West Coast to the East Coast in 68 minutes and 17 seconds. That's as close as I could get to Los Angeles to New York.
they fly on and on on and on on and on on and on on and on on and on on and on on and on! they fly forever!
The Blackbird
No. Astronauts fly at least 100km above the earth. The highest altitude they'll admit to flying the SR-71 is 90,000 feet--less than 28km.
Okay, here's a tip about which can climb in a higher altitude will win. You decide which one can fly much more higher altitudes. Most time missiles have shot down pretty much military aircraft though but not that much. Still not easy to destroy military planes. Most types of jets get shot down, well just a few of them not that many but there's only one military aircraft was never been shot down before, the SR-71 Blackbird the spy-plane. Missiles climb pretty high and fast but the SR-71 Blackbird uses stealth and a high speed afterburner. That's was a pretty good lock-on to the SR-71 Blackbird though but it is not easy. Missiles are pretty awesome and they're pretty powerful but not that much. Missiles still can lose military aircrafts. Military planes still can win. Missiles can only fly at 70,000 to 80,000 feet but the SR-71 Blackbird can fly at 82,000 to 85,000 feet. No SR-71 Blackbird was ever shot down before. The SR-71 Blackbird is the winner.