Researchers at the U.S. Naval Research Laboratory (NRL) have set a new continuous flight record with an electric drone powered by a fuel cell running from liquid hydrogen in cryogenic storage. The Ion Tiger unmanned aerial vehicle (UAV) flew for 48 hours on April 16-18, shattering their previous record of 26 hours set in 2009 […]
![Liquid hydrogen fueled drone shatters endurance record h_drone1](https://www.scienceagogo.com/wp-content/uploads/2016/06/h_drone1-100x100.jpg)