ORIGINAL: Mikeup
RPMYou typed to have turn fin parallel to rudder. Ok, does this also mean the length of turn below strut will be the same, so they will work together completely in unison. Also will the turn fin be vertical or 90 degrees to transom. Now if vertical, my guess that it would work the best. Also the turn fin should be the same width as rudder. Correct me if i'm wrong!
I think you need to do your research on how turn fins work,a turn fin should not even touch the water when the boats running straight this is why most of us mount them parallel to the bottom so when the boat leans into a turn it enters the water to help hold the transom in the turn but in straights the fin or fins are completely out of the water.
Mart