Just yesterday, when I was discussing the Taranis, I mentioned the Phantom Ray from Boeing. Here is another project that Boeing is working on known as the Phantom Eye.
This is a spy plane, but this recently unveiled unmanned aircraft has an interesting twist: it runs on hydrogen. That big round area in the middle is apparently filled with liquid hydrogen, that can somehow power the engine.
Now, some of you might worry that filling the Phantom Eye with hydrogen could create a mini-Hindenburg with a 150-foot wingspan. Especially if you are floating this thing over enemy territory, and they might just take some shots at it. However, this thing is over 65,000 feet in the air, and that is a little out of range of most firearms.
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