National Security Journal on MSN
The Mach 6.7 monster: Why the X-15’s speed record still stands in 2026
Summary and Key Points: The X-15 program, spanning 199 flights between 1959 and 1968, pushed the boundaries of aeronautics into the hypersonic realm. -Capable of reaching altitudes of 102,000 feet, ...
Interesting Engineering on MSN
China develops Mach 6 hypersonic naval gun projectiles with 12-mile range
Chinese researchers have revealed progress on a weapon concept that could compress hypersonic performance ...
Interesting Engineering on MSN
Europe’s first privately built hypersonic missile notches Mach 6 speed in test
A German-British defense startup has completed a successful test flight of what is widely ...
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