Hydrogen-fueled propulsive system takes wing
The AeroVironment (AV) Global Observer unmanned air vehicle has flown successfully at Edwards Air Force Base in California. This is a high-altitude, long-endurance unmanned aircraft system that is touted by AV “to combine the best attributes of satellites and both manned and unmanned aircraft.” Its revolutionary liquid hydrogen-fueled propulsive system, an LH2 internal combustion powerplant […]