I seriously doubt Hydrogen was chosen for it's "greenness". More likely for it's energy density vs weight. Greenness? just spin...
I suspect the military wants the ability to deploy a platform to a given location - quicker than "lighter than air" platforms can get there.
THIS version: obviously not related to armed drones missions - it has a very different mission (at this stage of development).
Likely would be used in conjunction with other types of drones on military operations.
Or monitoring a border for smuggling (para-military/policing operations)? Talk of using these for US / Mex border , monitoring Gulf of Mexico, etc.... With weather issues, and limited quantity, a more quickly deployed choice than Dirigibles.
Thanks. "Reforming" is the correct term--slipped my mind. So long as natural gas (methane) is cheap, that is the preferred way to make hycrogen. Electrolys is proposed for storing solar-generated electricity, although the "round-trip" efficiency is <<50%.
It's been my understanding (which may be wrong) that even in the case with an on-board pilot, a lot of bombing runs are done without visual inspection by the pilot. He might be targeting based on info or a signal from someone on the ground, based on pre-determined coordinates or looking through a video display to enhance light, aim, magnification, etc. - no unlike a remote pilot. The one exception is the remote pilot can have his / her mind on the mission without having the think about preserving his / her own life.
I'm waiting for the drones to start having more intelligence. Possibly needing the remote operator only to confirm the shoot orders at the last minute.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.