National Security Journal on MSN

A British Supermarine Spitfire almost broke the sound barrier before Chuck Yeager

Chuck Yeager broke the sound barrier in 1947 in the rocket-powered Bell X-1 Glamorous Glennis. Three years earlier, a British ...
Interesting Engineering on MSN

NASA tests confirm next-generation Mars rotors can safely break the sound barrier

NASA’s Jet Propulsion Laboratory (JPL) has successfully tested new rotor blades that surpassed the ...