H4 - Hydrogen powered drone

Drones are only useful when they’re in the air. And thanks to the limited charges provided by batteries, drones spend a lot of time not flying. Electric drones are often limited to just 20 minutes of air time before they have to land and get new batteries, or wait for the old batteries to charge. With hydrogen fuel cells, This drone could spend up to two hours hanging in the sky, be refueled almost instantly after landing, and then take another 120 minutes in the air.

There are 4 independent hydrogen cannisters socketed in the body with easy acces, no need special ability to replace them for full ones so Drone is operation-ready in few second again. In the case below there is sensor system integrates daylight HDTV camera, image-intensified HDTV camera, laser illuminator and laser distance measure system. The full-motion video from each of the imaging sensors can be viewed as separate video streams or fused. System is designed to work autonomously to cover large landscape in area. Drone is designed to provide control and overview from above. It can be also used as part of traffic control system in big cities or  it can make detailed 3D maps in unexplored areas.