Me not being an engineer, I don't know which foil shape would be correct. But anything will be an improvement over what I have. I thought to try to mimic the keel...hmmm...wonder which one that is? Oh, dear... decisions, decisions.
Again, mucho thanks for all the help from you, Doug and everyone else here at the site. I actually started yesterday- removed the zinc from the blade, drilled out a new pivot hole in the rudder and rudder head. Yeah, I sail in salt water and had to replace the rudder gudgeon this year. I'm switching from SS bolts to bronze for the rudder pivot bolt and the two bolts that secure the rudder head to the gudgeon. Should help. The bottom ear of the gudgeon was well on it's way to being gone completely.
Doug is sending me templates so I'll start a-cuttin' as soon as they arrive.
Bob23 out (of my mind, some would say!)