The Skyhawk rudder started as a low cost construction in which a flat plate was wedged between horizontal stiffeners with a forward frame. This supposedly was a lower cost version of a smoother conventional rudder. Douglas did make a smooth surface rudder, but during flight testing found that there was really no difference, so they retained the ridged version that is a signature of all the Skyhawks regardless of the marks or derivatives.
here is a close up of an actual early Skyhawk
For this build, I decided to go for the more complicated built up version since it will be prominent in this large scale
here are the parts
remove the rudder's flat plate and add the forward frame. Then add the small triangular stiffeners on both sides
ready to mate to frame
glued
other side.
add a piece of wood dowel to forward edge to maintain a shape
here the rudder is installed
left rudder deflection
right rudder deflection
neutral rudder
and finally the vertical fin and rudder view
This detail certainly added a few hours to the build, but was really satisfying at the end.
Isaac