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

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Old 12-02-2010, 08:56 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 09:01 PM.
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Old 12-03-2010, 01:44 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, 01:45 AM
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It all depends how many beers you've had.
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Old 12-03-2010, 09:42 AM
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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, 03:00 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, 04:12 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, 04:19 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, 04:59 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, 08:02 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 03:06 PM. Reason: Error correction. Thanks HTRDLNCN.
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Old 12-03-2010, 08:05 PM
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Quote:
Originally Posted by T2x View Post
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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