Jeff,

Nice summary. However, I built it with the "short" rudder and the lower dihedral and it doesn't have any coupling issues that I can find. Agine the real world vs. aerodynamic theory.

(BTW, I've got two degrees in aero from Georgia Tech and this is far from the first time I've had results not quite in line with my "very carefully and accurate" calculations (g))

I've also cut wings like Don suggested. This was one of the tuning techniques in the "good old days".

threads like this are what's fun....

Rich