Having a curved edge will probably aid in dislodging weeds or other flotsam that may get picked up, but in reality it doesn't matter since the prop wash will disperse it anyway. actually, a wide upper and a narrow lower part will reduce the rudder efficiency. The most effective part of a rudder is the lower 35% and for optimum performance it would be of benefit to have it wider on the bottom than the top.I have a question. The leading edge of the stock rudder is swept back. The only reason I can think of for this is to help seaweed, stray lines or debris from getting hung up on the rudder. If that's the reason, is it worth the effort to do the same with the new rudders or is it really going to matter?
This is true for Aluminum and Stainless which needs exposure to oxygen to develop a protective layer of oxidation to prevent corrosion. This is the total opposite to regular carbon steel which needs to be painted or otherwise coated to protect it from corrosion.I read some articles that said that it should not be painted at all, even with bottom paint.
They indicated that sealing the ss will cause it to lose some surface oxidation that helps prevent corrosion.
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