Can quadcopters still fly with propellers at an angle? By this I mean like the whole motor mounts will be situated along a certain slope (so as to be neither horizontal nor vertical).
UPDATE
I meant something like this (I know it's a crude diagram, but I hope it gets my meaning across better):
I don't think that's how most drones fly, if the surfaces the motors are on are folded in a way that resembles a flying motion of birds or butterflies.