Why did you make a bigger rudder blade? More blade = more drag. You want the rudder as small as possible while still being effective. That is one thing I still remember at my age. Thanks you for your advice and for posting the pictures. Since I am making the rudder to the new shape, I decided to make it to the new shape's dimensions. No other reason. Practically, it seems a good thing to have the rudder deeper in the water for a couple of reasons, and I would imagine that the rudder with the proper shape will act as a lifting surface and a least partially negate the slight increase in area. I have a second set of hardware to put on the new rudder, so it should be easy to compare.