Engineering360: "Hydrogen Fuel Cell Customized for UAV"

Every time fuel cells comes up in a conversation with a retired metallurgist friend, he starts shaking his head, with a profusion of rhetorical questions and comments, such as, ''what about fouling?, what about adjusting kinematic rates of power production to meet near instantaneous load surges?, how do all the components respond in harmony to dramatic changes in G forces?, etc." Still, the ONR folks are on the cutting edge. The best of luck.

"The researchers designed and built a custom fuel cell system capable of up to 5,000 W, using formed metal-foil bipolar plates to save space and weight."

This is a great claim. I would love to see the data from the actual flight tests. Would like to see expected flight duration vs actual flight duration ( obviously accounting for the amount of fuel left after landing so one would not crash the drone).

Let's make sure there is a follow up on this article.

Great job researchers.