The XB-70 Valkyrie was designed to fly at Mach 3, outrun enemy fighters and revolutionize America's nuclear bomber force.

A Boeing F-15 is still quite fast, but not nearly Mach 3, the company’s program manager said on Feb. 23, correcting a previous statement. “Mach 2.497 is what we can get out of the Eagle jet and that’s ...

Lockheed’s D-21 was an unmanned reconnaissance aircraft designed to fly over hostile territory at Mach 3.4 without risking a ...

For a brief shining moment, the U.S. Air Force lay on the verge of flying the fastest, arguably most badass fighter jet of all time. The jet, the YF-12A, was one of several proposed variants in the SR ...

Summary: Boeing’s F-15EX Eagle II, boasting remarkable aerodynamic efficiency and powered by twin GE F110-GE-229 engines, initially claimed to reach speeds nearing Mach 3. However, Boeing program ...