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I don't remember what the original Triton rudder looked like on my boat. Is the trailing edge tapered? If so, how important is it that it be tapered? When I built my new rudder 7 1/2 years ago, I didn't taper the trailing edge. The boat sails fine, but I have nothing to compare it to; I've never sailed a Triton with an original rudder.
Mine is most likely original. There is some taper to it... probably 1-1/8" at the leading edge and 3/4" at the trailing edge, but that trailing edge is just a round-over, not a "taper" in the spade-rudder sense of the word.