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 manoeuvrable, given the following configuration:
What strikes me is a lack of a surface that creates a force to counteract the moment generated by the distance between the wing's lift and the gravity 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.