Fuel cell

The sheer weight of the batteries required for that range would leave zero room for actual cargo.

That forces the industry to look at hydrogen fuel cells.

And hydrogen fuel cells introduce a completely different set of chemical and structural nightmares for the design teams.

Yeah, the detail on fuel cell membranes in the Invalia research was wild.

You have this highly delicate membrane inside the fuel cell, and one of the biggest threats to its lifespan is actually the plastic housing holding it together.