The United States banned supersonic flights over its land in 1973 due to their ear-splitting sonic booms. Experts are building a plane that should travel at those speeds but create only gentle thumps ...

Add Yahoo as a preferred source to see more of our stories on Google. Just days after NASA's experimental X-59 plane flew at supersonic speeds for the first time, the space agency has announced ...

The U.S. Air Force is the entity responsible for assigning X-number designations to important experimental aircraft and rockets that dates back to 1947. The new experimental supersonic X-plane was ...

NASA's X-59 supersonic jet ended its second test just nine minutes into flight, ending the one-hour event almost as soon as it began because of a system warning. Credit: NASA / Jim Ross Nothing seemed ...

NASA is testing the X-59, an experimental plane that was designed to exceed the speed of sound without a loud sonic boom. Credit: NASA / Carla Thomas NASA's X-59 jet has broken the sound barrier for ...

NASA's X-59 research plane took its first supersonic flight at the beginning of the month, and now it's demonstrated that it can reach the speed and altitude conditions it'll need to achieve for ...

The NASA X-15 rocket plane reached speeds of Mach 6.7 and altitudes of 300,000 feet, flying to the edge of space and back. This groundbreaking program helped define the boundary between aviation and ...