Planes That Changed the World
Season 1, Episode 3: SR-71 Blackbird - Hypersonic Surveillance
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Lockheed were tasked with creating a plane invisible to Russian radar, capable of reaching an altitude of 80,000 ft and speeds of Mach 3.2.
Lockheed were tasked with creating a plane invisible to Russian radar, capable of reaching an altitude of 80,000 ft and speeds of Mach 3.2.
