ORIGINAL: jrf
Adding a sub-fin (ventral fin) will definately help. Add about 50% of the area of the existing fin and rudder. Also check and make sure there is no binding in your ailerons controls.
With that much dihedral, you have a lot of level flight stabiltity that your ailerons have to overcome to make it bank. It's a bit of work, but taking all of the dihedral out of the wing will make it handle MUCH better in the turns.
Jim
Hi Jim
I have made changes to dihedral - cut it in half. I measured an angle of 170 deg at the wing root and bent the steel joiner rod so I now have an angle of 175%. Also added a vertral fin and it is just about equal to the vert fin and rudder area. Looks big!! Hope I can fly it this weekend to see the results.
This photo shows difference in dihedral and fin.
Joe