
apsisproject.blogspot.com
The APSIS ProjectWednesday, August 26, 2009. The idea I was trying to (poorly) convey is a system that added another pulley / chain drive system behind the cockpit as well as in the front. Each motor would do half the work as just one to perform pitch (as long as it was balanced correctly), and when used together, can achieve the Heave axis. Across the bottom you could have a set of tracks that run laterally under the setup and when actuated oppositely, they perform Yaw; in tandem, Sway. Here are some rough idea sketches.
http://apsisproject.blogspot.com/