c34d.gif (1515 bytes)

POLAR DIAGRAM FOR SHOAL DRAFT KEEL, MKI
 

I had access to a program that predicts theoretical boat speed for various wind conditions. I wanted to compare the fin keel polar that is in the FAQ with a polar for a shoal (wing) keel. The wing has more wetted area so it is a bit slower but the angles are about the same. There is a difference in best downwind heading, think that is more a function of the program than the keel.

Here is the polar for the older boats that just see apparent wind on the windex.

Ken Juul

 

Last modified by Mark Elkin, Wednesday, August 10, 2005 . Copyright 2005 by Catalina 34 International Association.  All rights reserved.