Season 1 Episodes3
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9.1
SR-71 Blackbird - Hypersonic Surveillance
9.1/10 · 28 votesApr 7, 201546 min
Ranked #1 of 3 in Season 1•+0.2 vs season avg
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.
Seasons1
Episode Summary
"SR-71 Blackbird - Hypersonic Surveillance" is episode 3 of Planes That Changed the World season 1. It scored 9.1/10 from 28 votes, ranking #1 of 3 episodes this season (season average 8.9). It aired on April 7, 2015.