Joby retrofitted a prototype electric VTOL with a liquid hydrogen system that traveled 523 miles with net-zero in flight emissions. Credit: Joby Aviation A flying-car-like vertical takeoff aircraft created by Joby Aviation has completed a first-of-its-kind, 523 mile test flight using hydrogen power. The aircraft, which reportedly left only a trail of water vapor in its wake, is being pitched as a more environmentally friendly alternative to traditional gas powered jets for mid-range, regional tr...