National Security Journal on MSN

At Mach 6.7 and 4,520 mph, the X-15 set the crewed aircraft speed record in 1967 — 59 years later, no one has flown faster

On October 3, 1967, U.S. Air Force pilot William “Pete” Knight flew the X-15A-2 to 4,520 miles per hour — Mach 6.7 — setting ...
National Security Journal on MSN

At 2,071 mph, Boeing’s 2707 was faster and bigger than Concorde — Congress killed it in 1971 by 1 vote and no American SST has flown since

Boeing’s 2707 supersonic transport was designed to fly at Mach 2.7 — 2,071 miles per hour — carrying up to 277 passengers, ...

Engineers at NASA’s Jet Propulsion Lab make a breakthrough in rotor technology

A little more than three years since NASA’s Ingenuity helicopter ended its pioneering mission at Mars, engineers at the Jet ...