On asking Youngcopter about the anti-torque system, Mr Jung confirmed the following to Rotorhub.com:- "We use a system similar to the one MD Helicopters uses. We do not call it NOTAR because there is a little difference in the design and this acronym is a registered trademark of MD. We just call it JCS which stands for jet control system. The basic patent of the MD system has expired some years ago which means that its content is state-of-the-art. There are several new and active patents owned by MD which are not touched by our JCS-design.