when to deploy the drop down keel? - Page 2 - SailNet Community

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  #11  
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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  #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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