The new wave of electric VTOL aircraft concepts (Joby Aviation, Zee, Lilium, Airbus A$^3$, etc...) has produced some audacious unconventional designs.
Now my question, is how Lilium's concept can be stable and/or maneuverable, given the following configuration:
What strikes me is a lack of a surface that creates a force to counteract the momentum generated by the distance between the wing's lift and the gravitational force.
And although control around the yaw axis seems possible with differential thrust, I wonder how the aircraft is controlled around the pitch axis.
From the forward part of the fuselage some canard-like surfaces with integrated propellers are deployed to provide hovering capabilities, however it seems these are supposed to be retracted during forward flight.
Some might suggest the pictures are pure artwork, but Lilium and its investors appear to believe in the concept: