The Aviationist on MSN

Going Hypersonic: A Look at the Record-setting X-15

An important part of data collection for the United States space program, the North American X-15 had astonishing performance ...

This Is NASA's Fastest Aircraft Ever

Only three of these aircraft were built, with one being destroyed and two operating successfully. The X-43 testbed aircraft ...
National Security Journal on MSN

The Mach 6.7 X-15 ‘Hypersonic Rocket Plane’ Has a Message for the U.S. Air Force

The X-15 was a rocket-powered research aircraft that pushed human flight to the edge of space and deep into the hypersonic regime. -Air-launched from a B-52, three X-15s flew 199 missions between 1959 ...
The National Interest

The X-15 was a Starfighter in All But Name

The X-15 was a key bridge between conventional atmospheric flight and spaceflight. The North American X-15 is one of the most groundbreaking aircraft ever created in the history of aviation and space ...