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WHEN THINGS SEEM AWRY

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Aug 05, 2021


I’m often approached with questions concerning lean and list and heal.  A boat not riding on its lines is dangerous, and very uncomfortable, not to mention its maneuverability is curtailed.

 Here are some reasons for list and some things you can do to alleviate the problem.

Weight
If your boat lists at rest, there is too much weight on one side. It could be gear or it could be water trapped in a stringer bay.

Suggested Solution: Investigate. Take inventory. Re-balance supplies; reposition crew if underway. Address water ingress and drain or dry.

Prop Torque
It’s normal for a right-hand-turning prop to cause listing to port in a single-engine application. The reason is that a prop is most efficient in the upper, down-moving quadrant of its rotation (between noon and 3 o’clock for a right-hand propeller) and so creates more lift on the starboard side; thus the boat lists to port.

Suggested Solution: Trim out more once on plane. The further from perpendicular to the boat the rotation gets, the less listing leverage it can exert. Use a prop with more pitch (within rpm limits).

Wind
V-hulls can tend to lean to windward. This results from turning slightly into the wind to maintain a straight course. Also, prop torque results in more lean than on flatter-bottomed boats.

Suggested Solution: Shift supplies or crew. Use trim tabs. Alter course (if possible).

Engine Trim
Running with the drive trimmed in exacerbates prop torque.

Suggested Solution: It’s correct to trim the engine in when achieving plane. But up and running, trim out to lift the bow, and, as it pertains to listing and heeling, reduce the effect of prop torque