A Lockheed YF-12A flying at Mach 3.2 and 75,000 feet fired a missile that struck a target just 500 feet above the ground, a demonstration that still sounds unreal until …

A Mach 3 YF-12A interceptor once hit a low-flying target in a historic missile test. See why speed and thermal tech still ...
Interesting Engineering on MSN

Stratolaunch aces latest Mach 5+ hypersonic test flight for US Missile Defense Agency

Stratolaunch has announced it successfully performed a hypersonic flight test in partnership with the ...
Hackaday

Mach 20 In A Wind Tunnel: Yes, It’s Rocket Science

Hypersonic speeds are defined by those exceeding Mach 5, and lately there’s been a lot of buzz about unmanned hypersonic vehicles making test flights. Vehicles returning from orbital flight also ...
Autoblog

Ford Mustang Mach 1 history: Time-traveling at the speed of sound

“Mach 1”: The term refers to the speed of sound, which is not a fixed number but varies based on the temperature of the surrounding gas. Named for Austrian physicist Ernst Mach, the term is a little ...