If you double the size while you do double the volume by a cube you don't increase the weight by a cube. Aircraft design weights engineer of over 20 years experience.
The are many factors that increase weight, pure volume isn't one of them. an interesting fact on metal strength if you increase the thickness by a third, you double the strength.

Wow, very cool, Hope this gets them additional funding to continue to scale it up, I would of never though in my life I'd see an aircraft perform a powered flight, without using an kind of engine or motor. Super impressive.

"Solid-state, ion-drive airplane silently flies with no fuel or moving parts" Huh? If it doesn't require fuel then why the batteries. Oh! I get it. We are flogging electric vehicles because they don't use any fuel either. So why do we hook them up to a coal fired generator every night?

@Grumpyrelic - You might do that but there’s no reason why you couldn’t be plugging in to renewably generated electricity. It is only your politicians and their golfing buddy Big Oil (and Coal) that is holding you/us back! Get some PV and an EV and ‘register your disaproval’ (and save a fortune at the same time)!

The curved upper surface of a wing is what generates lift as it causes air to flow faster, reducing pressure on the upper surface.
Wouldn't the ion propulsion system be better put above the wing instead of below?

Flight behaviour in the event of a failure of the ion propulsion system may be better with the propulsion system below the wing instead of above. The drag would destroy lift.

I remember ion drives from Popular Mechanics/Science back in the sixties. They showed how you could construct one with balsa wood and wires and high voltage generator. https://www.youtube.com/watch?v=Wtd2iyXB8lg

Great glider !

Marvelously droll!
I can hardly wait for the wind tunnel tests.
Can you dial a wind tunnel down to 8mph?

40,000 volts on the wires! Program it to circle pesky areas as a mosquito zapper,....or whatever.