Airbus Patents Mach-4 Bizjet Concept
Airbus has been granted a U.S. patent for an airplane that could fly commercial passengers at speeds up to Mach 4.5, according to various news reports this week. The plans show the hydrogen-fueled airplane would take off vertically, propelled by turbojets, then a rocket engine and wing-mounted ramjets would propel the aircraft as high as […]