The sr-71a Blackbird was a US reconnaissance airplane of the cold war and is, together with its predecessor, the a-12, considered the fastest jetpowered aircraft ever made.
It flew over mach 3 and and over 20.000 meters high.
Sr.stands for strategic reconnaissance
and the sr-71a was the normal reconnainssance aircraft with one pilot ond one other crewmember, with the sr-71b being a trainer version with a second cockpit on the back.
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