NASA's X-59 quiet supersonic aircraft has begun low-speed taxi tests, a final step before its first flight later this year. The X-59 is designed to reduce sonic booms to a "gentle thump ...

Key Points and Summary on X-43A – NASA’s X-43A was a small, unmanned experimental aircraft that, in 2004, shattered world records by flying at nearly Mach 10 (almost 7,000 mph), becoming the ...

NASA’s Quiet Supersonic X-59 Nears First Flight Medium- and high-speed taxiing marks the final phase of ground testing for the experimental design.

American space agency NASA said it completed a new series of tests on the X-59 experimental aircraft, putting systems and piloting through their paces.