when to deploy the drop down keel? - Page 2 - SailNet Community
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post #11 of 12 Old 06-20-2008
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A swing keel is just a heavily weighted centerboard generally. A lifting keel is a totally different beast. Swing keels and centerboards serve much the same purpose, in the same way, with the swing keel having a bit more to do with righting moment than an unweighted centerboard would.

This photo is of the lifting keel used in a Tide 28 sailboat.

My boat has a centerboard, which is made of wood. It is buoyant and must be held in the down position.

A Southerly 46RS has a swing keel, which is weighted and in the case of the Southerly RS weighs about 4800 lbs. Functionally, it combines the righting moment features of a lifting keel, with the center of lateral resistance features of a centerboard.


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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

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post #12 of 12 Old 06-20-2008
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It also has about 200 lbs of concrete in the hull around the whatever-it-is trunk to further confuse the issue. Even the manufacturer wasn't clear. In the specs they gave the max draft with "C.B. down" but in the text refer to it as a "retractable keel".

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