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Posted: Wed Sep 09, 2009 7:46am

Post Subject: ballasting

As I near the end of fitting out a sailaway I want to adjust the ballasting. I assume the boat should be dead level with diesel and water tanks full? What is the ideal depth of the swim below the water? Or what is the minimum advisable?


Posted: Wed Sep 09, 2009 8:11am

Post Subject: ballasting

Dear Chas, it is usually stated that the uxter plate (sometimes called the swim plate) should be submerged by at least two inches. Depending upon the swim shape, prop size & speed and engine power you might find the prop ventilates when acceleration, turning fast or reversing. This produces a growling sound from the prop area as air is drawn down and under the uxter plate. If this turns out to be the case you need to increase the ballast to submerge the uxter plate further. Tony Brooks

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