National Security Journal on MSN

The XB-70 Valkyrie could reach Mach 3 at 70,000 feet with 6 engines — friction heated its ...

The Air Force commissioned the XB-70 Valkyrie in the late 1950s to drop nuclear bombs from Mach 3 at 70,000 feet. North ...
Aviation Week

Boeing Withdraws Near-Mach 3 Claim For F-15

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 ...
National Security Journal on MSN

At Mach 3, the XB-70 Valkyrie lost pieces bigger than the YF-12 — one test pilot’s bar ...

In the mid-1960s, Lockheed’s Mach 3 YF-12 and North American Aviation’s Mach 3 XB-70 Valkyrie were both flying test missions ...
The National Interest

F-15EX Eagle II Fighter Can’t Hit Mach 3 Afterall

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 ...