Did you modify the fin as well or just the rudder?

Both fin and rudder were redesigned. No modification is required to the fuselage. The new fin is designed to mount in the existing slot.


Matt, where do you have your cg now ? Is your fuel tank in the stock location ?

CG is at 5 3/8" . It has great 3D performance without being too sensitive on the elevator for landing.
Fuel tank is on the CG. (I am running a YS 1.10)


How did you arrive at this rudder design, by trial and error or calculation ?

It was really a "that looks about right" method. I really don't like the look of the stock rudder and I wanted to make one that both performed better and was more visually appealing. So, I got improved function through improved form.!