Hydrogen-Powered Navy UAV Shatters Flight Endurance Record

http://www.popsci.com/technology/article/2009-10/hydrogen-powered-navy-uav-shatters-flight-endurance-record?page=

 

Flying out of the Aberdeen Proving Ground, the Ion Tiger UAV set a new record for hydrogen-powered flight by staying aloft for 23 hours and 17 minutes. This places close to the 30-36 hour endurance of the Tiger's gas guzzling Predator and Reaper cousins.