Strap your seat belt tight and hold on – NASA has revealed plans for passenger planes faster than the speed of sound. The experimental X-planes were tested out by the American aeronautic agency back in the 1940s and they’re set to make a comeback. One of the models is a twin-hull plane called the ‘double bubble’ D8 and fast enough to break the sound barrier. NASA has finally granted 2.19 million to bring one of the models to life.
Faster than the speed of SOUND: Nasa’s radical future plan for plane travel
