About this programme
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.
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Programme listing
SR-71 Blackbird- Hypersonic Surveillance
Planes that Changed the World is next on Discovery History at 22:00 on Sat 14 Nov 2026.
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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.
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