Ornicopter research project ( NL )
As a coaxial helicopter enthousiast it is a must to learn about a true torqueless rotor concept which is under develoment at the Delft University of Technolgy in the Netherlands.
This amazing torqueless rotor drive concept works through a flapping movement of the rotor blades.
http://www.delftoutlook.tudelft.nl/info/index.cfm?hoofdstuk=article&ArtID=5318