Does your system allow for twist in the sail from head to foot in order to accomodate the increasing wind speeds as you go up the mast? From the forgoing posts it isn't clear if this is the case.
The benefits are less turbulence around the body caused by propeller disturbance at the front of the fuselage, and safety provided by a main wing that will not stall. The canard is designed to stall first and reduce the main wing angle of attack. Another benefit more lift. Both wing and canard...
A very reasonable prop modeling system is available from Don Bates see his website at -http://home.earthlink.net/~bateseng/
You are absolutely correct about the complexity of forces operating on a propeller. Once you model the design nothing can replace building it and real world testing it to...
