How do they stay up?? I keep loading this up and thinking "but how?!" love it! Proper Dune vibes going on. 

yep. Very unique design. The containers getting dragged behind is not bad. Maybe adding some engines to them so they would allign better when flying in curves or so they don't fall down would be nice. ^^

Love the idea of a trail of cargo compartments. As Blackmage says, big Dune vibes but also has the feel of that spaceship from 2001. You missed a trick though, really wish they slowly rotated on their z-axis ! :)

Really Unique entry I am super impressed. Gives me Techno Dune delivery worm vibes!