They did it. AEROPAK is a UAV specific powering solution. It runs just on water (hydrogen fuel) and delivers lots and lots of electricity.
This product has unbeliavable charateristics compared to our primitive battery packs, allowing looong flight times. I discovered it today, and am waiting for a quote from Horizon Energy Systems. They also sell a complete hydrogen power ssolution for RC cars.
New horizons for us! Enjoy