Trim Tabs Angle
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Trim Tabs Angle
Does amyone know why the trim tabs are mounted on an angle, usually the same angle as the hull ? When running on the water the boat is level, not on an angle like the hull. It would seem that if they were 90* to the water when running that they would hold the bow down better. When they are in the down position they are also angled out, which would put a drag on the boat when moving. Has anyone ever tried mounting them at 90* ?
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Re: Trim Tabs Angle
Many performance boats mount their tabs flat or flater than the vee of the hull. Some of Fountains top boats are dead flat all the way at the edge.
Last edited by Pismo10; 11-14-2005 at 08:51 AM.
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Re: Trim Tabs Angle
Originally Posted by Pismo10
Many performance boat mount their tabs flat or flater than the vee off the hull. Some of Fountains top boats are dead flat all the way at the edge.
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Re: Trim Tabs Angle
Originally Posted by Pismo10
Many performance boat mount their tabs flat or flater than the vee off the hull. Some of Fountains top boats are dead flat all the way at the edge.
Last edited by 32 caliber; 09-12-2005 at 07:31 PM. Reason: add pic
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Re: Trim Tabs Angle
Some velocitys also mounted the tabs flat with the deck. If you were to look back at the bottom of the boat at speed the water comes off the bottom at the angle of the bottom. It would only be flat if the bottom were flat
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Re: Trim Tabs Angle
Originally Posted by mmwalters
Some velocitys also mounted the tabs flat with the deck. If you were to look back at the bottom of the boat at speed the water comes off the bottom at the angle of the bottom. It would only be flat if the bottom were flat
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Re: Trim Tabs Angle
it doesn't make sense, though, if you have it mounted flat, perfectly in line w/ the hull what happens when your running the boat w/ the bow high? dont't the tabs drag in the water and slow the boat down? mine are set up that way and i am considering raising them
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Re: Trim Tabs Angle
Jim I agree, the bottom is flat only in the area of the chines. I believe on a pad bottom like a velocity, the pad lifts the boat so high at speed that the v section on both sides of the pad have little contact with the water. Maybe that explains the flat mounting. I have seen both mounting positions on race boats. The most common by far is the tab at the angle with the bottom.
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Re: Trim Tabs Angle
mcrsr You sure don't want the tabs to drag at speed. It is common to mount tabs 3/4'' above the bottom so they will not drag. There should be enough UP angle so the tabs do not touch when the boat is trimed out. Remember the best running angle on a well set up hull is only 2-4 degrees
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Re: Trim Tabs Angle
From what I could find, it seems all the newer fountains have the tabs 90* to the water, the older ones are on an angle equal to the v hull. They must of changed it for good reason...it wouldn't be a very big deal to reposition mine, maybe I need to make the change and then see what difference it really makes....
Last edited by 32 caliber; 09-12-2005 at 08:07 PM.