Shoal Keel Polar

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POLAR DIAGRAM FOR SHOAL DRAFT KEEL, MKI

by Ken Juul

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 are the polars for the older boats.

PolarShoal1.jpg

PolarShoal2.jpg