Hi all
I was hoping IanD would reply has it's his drawing I'm going to build from I was just not sure if the length of the rudder was right having looked at other rudders. The 60ft narrowboat is in the making at the moment but the rudder that is on will have to replaced anyway. I've decided to make the rudder out of stainless steel so I will not have to be concerned about erosion on the thinner contour profiles, so far the material cost including a one and half meter 40mm stainless bar is about £550 but going on the experience of IanD should be worth it. Thanks for all your comments.