Friend wanted a helicopter that uses no tail rotor, no coaxial, no super massive tail for control, (he did say use reaction wheels but nah), and no tandem, etc. This functions on one singular motor. The center acts as a ball bearing that captures most of the opposite force allowing for stability.

[EDIT] I just looked it up and this is maybe coaxial? Idk, wiki says 'motors' and others say two motors, but there is only one.
The lower section is fighting the rotation of the primary rotor on top and the wind (which is why those eight are yaw stabilizing wing). This is why it is stable. That isn't balanced or symmetric at all with the rotors on top, nor are they providing any lift.