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Old 22-09-2021, 12:36   #1
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Trim Tabs

Iím a recent owner of a 2005 Carver 36 Mariner. Iím looking to replace my trim tab assembly which has been inoperative since my purchase. The current configuration is a Bennett hydraulic with one actuator on each trim tab. The trim tabs are roughly 22x11Ē. My question is has anyone had experience with putting larger trim tabs on this vessel? Would you recommend that I increase the size for better efficiency?
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Old 22-09-2021, 12:39   #2
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Boat: Chris Craft Catalina 381
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Re: Trim Tabs

If you can fit wider tabs (such as going from 24x12 to 36x12) it certainly won't hurt. Reducing the tab deployment angle at cruise will usually save a small amount of drag (lift/drag ratio of the tabs is worse at steeper angles). Wider span (higher aspect ratio) tabs are also slightly more efficient by nature.
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Old 22-09-2021, 16:21   #3
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Re: Trim Tabs

Thank you. Your response was very helpful. I believe there is enough room to go with the 22x36” tabs. Do you know if that size would require hydraulic actuators or could I go with electric?Are there pros and cons between hydraulic and electric actuators?
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