Waterline Length - SailNet Community
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post #1 of 4 Old 03-23-2013 Thread Starter
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Waterline Length

Does anyone know if, when a rudder blade comes above the W/L of a boat, the width of the rudder or a portion of it is included in the normally accepted W/L length measurement?

Or, in a case like that, does the W/L measurement end at the rudder post?

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
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post #2 of 4 Old 03-23-2013
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Re: Waterline Length

Uhhh.... Bob? you there???

I'm going with rudder post.....

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
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post #3 of 4 Old 03-23-2013
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Re: Waterline Length

Jon:
I have that feature on a lot of my designs. I would never include the chord of the rudder in the DWL measurement. There is just not enough volume involved, wit a normal rudder, for it to help extend the sailing length of the boat. Of course you could fudge it and include the chord of the rudder but I think you'd be fooling yourself. So I agree with Faster on this one.

I could be wrong but I know the way I have treated rudders.

Now there were some rudders back in the very early IOR days, we called them "golf tee rudders, that had a very thick upper end that faired right into the bustle. A section thru the rudder stock would look almost exactly like a golf tee. In that case I would include the rudder chord. But these rudders were devilishly difficult to build and dissapeared quickly. Britt Chance used them on a few of his designs.
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post #4 of 4 Old 03-23-2013 Thread Starter
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Re: Waterline Length

Thanks Bob.

I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.
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