Friday, December 5, 2008

Mine's bigger

Well, Scott came by and dropped off the B's rudder. I was sort of guessing at how big to make my rudder and what foil and planform. I was pleasantly surprised when comparing the rudders that they seem fairly similar. After close examination, the foils seem very close. The B definitely has a more efficient planform with its long elliptical curve. My rudder is a little longer and has more surface area--but my boat will be a bit bigger than the B and weigh a bit more so it stands that slightly bigger will indeed be better. I'm trying to decide whether to recut the rudder to more match the B's or to leave mine as is. I'm thinking my rudder's planform while not quite as efficient drag-wise will be a bit more powerful and forgiving as it will start to stall at the tip and work it's way up (giving me some warning) whereas the B's will stall all at once. So I'm thinking I may glass the rudder blank I have to use as a starter rudder. Until we get the boat tuned and dialed in, we will need a poweful yet forgiving rudder--because when it comes to steering, I'm no Scottie. I am going to make a template from the B rudder to use for a future high-performance rudder. Thanks Scott!

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