The Lockheed SR-71 Blackbird is arguably the most recognisable aeroplane ever to take flight. The first SR-71 entered service way back in 1966 as a long range strategic reconnaissance capable of sustained cruise at Mach 3.2 at 85,000 feet, and had a reported range of 3,200 nautical miles without the need for refuelling. The aircraft was a further development of the A12 which first flew in 1962.
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