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What determines which way to mount trim tabs ( straight or angled )

Old 12-02-2010, 07:56 PM
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Default What determines which way to mount trim tabs ( straight or angled )

My hull is 27 ft 25deg V with strakes all the way to the back and single big block/bravo,
it had K-Planes once but somewhere along the way they were removed .
It rides awesome and cuts waves like butter but wants to chine walk when I am
approaching 70mph. I plan on getting 24-28" tabs and wondering what are advantages
to both ways of mounting tabs.
Thanks!

Running attitude at around 55mph with very little trim:
http://damncarrera.com/SS8Msig.JPG

Last edited by HTRDLNCN; 12-02-2010 at 08:01 PM.
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Old 12-03-2010, 12:44 AM
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This has been discussed on there several times over the years. Do a search and you will find some good info.
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Old 12-03-2010, 12:45 AM
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It all depends how many beers you've had.
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Old 12-03-2010, 08:42 AM
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Originally Posted by PhantomChaos
It all depends how many beers you've had.
lol And what kind of oil you use.....
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Old 12-03-2010, 02:00 PM
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Cool, I will do the search and see what I find..
I just hate using the search feature on here because it wont let you do a search for a phrase such as "trim tab" no matter how you put it , it still searches for individual words giving you far more results than you want.
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Old 12-03-2010, 03:12 PM
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My 2 cents is that the majority of boats I have seen with them "straight" had notched transoms, and pad bottoms. Although, I have seen notched transom boats with them "angled" too. I personally have not seen any deep vee straight transom boats with them mounted straight. Good luck with your search.
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Old 12-03-2010, 03:19 PM
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Mount them straight.....

Mounting them angled does nothing to stop your chine walking and the tabs act more like brakes than leveling devices.

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Old 12-03-2010, 03:59 PM
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That looks like a lot of bow lift for light trim at 55 MPH. Were you porposing at this trim level?
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Old 12-03-2010, 07:02 PM
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I had that issue once. I put 380 K-Planes on angled. They were huge for the boat, but nailed the chine walk -- gone. Tapped them down until they just kissed, but no more! Any more than that and the bow steered the boat. After I got it right, I put sleeves on the trim cylinder rods so I could not under tab. Felt like the boat got 3 feet longer.

Last edited by FasterFaster; 12-04-2010 at 02:06 PM. Reason: Error correction. Thanks HTRDLNCN.
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Old 12-03-2010, 07:05 PM
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Originally Posted by T2x
Mount them straight.....

Mounting them angled does nothing to stop your chine walking and the tabs act more like brakes than leveling devices.

T2x
Agreed!
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