Nick,
The lead post in this tread was about a future means of yaw control, which could be applicable to all twin rotor configurations.
Re: the tandem configuration; [edited], I previously erred by generalizing, and thereby implied that yaw authority is inadequate in this configuration.
Re: the intermeshing configuration; other pilots have said that autorotation is not ideal.
Re: the coaxial configuration; you say "note that no twin rotor has failed to be certified, indicating adequate, if not spectacular yaw control." I believe that Kamov has been unable to get US certification for the coaxial helicopter. Perhaps you can advise if the reason is technical or political.
Last edited by Dave_Jackson; 10th Jun 2003 at 13:23.