https://robbreport.com/motors/aviation/ ... 234613101/
I did get a bit worried when I read this part though:
Not keen on that idea if there's a crash, rupture the bladder and dump what's left of the fuel on the occupants of the cabin.Some of its secrets: Fuel storage will no longer take place in the wings, so the designers made them thinner and more aerodynamic. Instead, the fuel is stored on a bladder on top of the fuselage, part of the aircraft’s singular design.
I'm also fascinated by the aerodynamics as to how the middle wing works if the one in front of it is dumping most of the air up and down so it might not see as much air. I await the first flying prototype with interest.