What exactly is the theory in play here ?
http://www.youtube.com/watch?v=JKUZHiqeuxY
PS: Never-mind the stupid audio-track !
From what it seems the two rotor are rotating in opposite direction to balance the tork.The two rotor are basically working as a aileron of the plane rest all is same elevator and radar.The difference in the speed of two rotors controls the aileron part.