RE: TF Contender 60 build thread.
Here are a few pics,
I left the top of the rudder the same chord and doubled the chord at the bottom of the rudder. The problem with the original rudder design is there is 70+% of the rudder above the thrust line, as rudder is applied the plane will roll opposite of the rudder input(left rudder=rolls right). The change I made in the rudder brings the surface area lower on the rudder and closer to the thrust line.
I just drew the change out on the plans before building. I sent my plans to a buddy who is supposed to put them into CAD and laser cut 2 of them in a 30cc size.