Ion Tiger_23 hour flight

Ion Tiger in flight. The 550-watt fuel cell is show in the box in the lower left corner. (Credit: Naval Research Laboratory) The Naval Research Laboratory's (NRL's) Ion Tiger, a hydrogen-powered fuel cell unmanned air vehicle (UAV), has flown 23 hours and 17 minutes, setting an unofficial flight endurance record for a fuel-cell powered flight.… Lire la suite Ion Tiger_23 hour flight