Supersonic flight means breaking the sound barrier, but there are some myths as to what pilots actually feel at Mach 1.

This 1969 Ford Mustang Mach 1 originally left the factory under power from a 351 ci V8, which has since made way for a replacement 408 ci stroker V8, partying alongside a Tremec TKO-600 five-speed ...

XB-1 is crucial for testing and developing ... about the speed of sound being measured in units of Mach: Understanding the speed of high-altitude flight. Additionally, sonic booms are so loud ...

The plane, nicknamed "Baby Boom," took off from Mojave Air and Space Port and reached an altitude of 35,290 feet before accelerating to Mach 1.122, the company said. That speed is equivalent to ...