Modern Engineering Marvels on MSN

Inside the SR-91 Aurora Mystery: Hypersonic Aircraft or Aviation Myth?

Few legends of aviation history enthrall like the story of the SR-91 Aurora, an alleged hypersonic plane said to have achieved speeds of over Mach 5. The story of the Aurora has become inextricably ...
Modern Engineering Marvels on MSN

Did the U.S. Build the SR-91 Aurora as the SR-71’s Hidden Successor?

The SR-91 Aurora, purported replacement for the SR-71 Blackbird spy plane, is a rumor with scant evidence for its existence. While there was a suggestion from a budget code name and one reported ...