SailNet Community

SailNet Community (http://www.sailnet.com/forums/)
-   Sailboat Design and Construction (http://www.sailnet.com/forums/sailboat-design-construction/)
-   -   Waterline Length (http://www.sailnet.com/forums/sailboat-design-construction/97817-waterline-length.html)

SloopJonB 03-23-2013 04:17 PM

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?

Faster 03-23-2013 04:26 PM

Re: Waterline Length
 
Uhhh.... Bob? you there??? ;)

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

bobperry 03-23-2013 04:42 PM

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.

SloopJonB 03-23-2013 05:23 PM

Re: Waterline Length
 
Thanks Bob.


All times are GMT -4. The time now is 03:36 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
(c) Marine.com LLC 2000-2012

 
For the best viewing experience please update your browser to Google Chrome