DIYDrones member and SUAS News author Gary Mortimer wrote an interesting article about the first flight tests of the Boeing Hydrogen-Powered Phantom Eye UAV. The story has also been syndicated at Slashdot.
The platform will no doubt generate interest outside of military applications because a hydrogen energy storage presumably offers a higher energy storage potential than current battery technologies. I look forward to learning more about why hydrogen energy storage was selected. For those of you who follow discussions about alternative sources and storage methods for transportation, Dr. Richard Muller has a number of excellent, publicly available lectures on the realities of energy density, the (simplified) numbers behind gas, cookie powered propulsion, battery energy density and losses, and why hydrogen isn't necessarily an environmentally friendly alternative to gasoline in his outstanding Physics for Future Presidents lectures.
While Boeing is principally targeting military applications for this platform, NASA, NOAA, and dozens of other scientific teams will no doubt have similar application requirements. If this makes sense for Boeing's perceived military applications (and I'd personally like to learn more about what design targets were met with this alternative approach) it almost certainly makes sense for atmospheric, weather, disaster assistance, search and rescue, and similar applications.