I have a few brocken micro helicopters lying around and deciced.to try a quick experiment.
I removed the tail rotor and electronics and connected the 2 main rotors together, by a piece of meral coat hanger.
What I forgot was, you need to have one of the rotors going the oposite direction to counter the rotation of the other one.
Failed but learned something. Back to the idea bin…..maybe I will create some fancy paper airplane.