As an old rc-heli pilot and have some tried outes as well I guess this is for real until the true nature of the blades are reveilded : )
Exuse me for my bad english.........
I have done some extensive tests and this is possible, but what makes my mind heavy are the gear to the rotors, shoulld be chain for miminum weight, rpm are right, but what about the props????
I for 15 years ago made a machine 9V with a .40 stroke propp hang up in a system and it flyed off butt thats without batteries attached....
So this should work eihter orginal techinic but plades???
They seem to be contrarotating, witch makes stuff eisiler!.
My MOC will soon come up on this site..... with an intrudruction....