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Old 29 December 2013, 04:17   #1
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Trim tabs

Apologies if this seems a stupid question but is it possible to fit trim tabs to a rib that has a sealed deck? Mine has a small inspection hatch behind the back seats to allow access to the transducer but this is tiny; I can barely get my hand through it. Apart from this, the deck is completely sealed at the stern. I was was wondering how the wiring and hydraulic pipes would run and where any reservoirs would be located. Thanks in advance for any advice.
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Old 29 December 2013, 04:28   #2
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If you use Lenco, which are not operated by remote hydraulic systems, then you will only need wiring...
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Old 29 December 2013, 04:33   #3
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Yes shouldn't be a problem. Have just installed a set of high performance Lenco tabs on mine. PM me if you want a copy of the installation instructions which show the location of the tabs and cable runs etc.
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Old 29 December 2013, 04:48   #4
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Fitted them as shown here , really do change The ride,,,


These where not Lenco tho self actuating units ,
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Old 29 December 2013, 06:22   #5
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Paul, have you asked Keith, he fitted tabs to La Frette.

http://www.rib.net/forum/f36/la-frette-tabd-47468.html
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Old 29 December 2013, 06:32   #6
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Yes shouldn't be a problem. Have just installed a set of high performance Lenco tabs on mine. PM me if you want a copy of the installation instructions which show the location of the tabs and cable runs etc.
Have you reinforced them? Keith decided not to when he fitted his and they bowed pretty quickly...

See threads: http://www.rib.net/forum/f36/omg-got...ght-54549.html http://www.rib.net/forum/f36/la-frette-tabd-47468.html http://www.rib.net/forum/f8/fitting-...abs-34209.html

The Lenco ones are very simple to install, just one cable down each side and then bold them on. The little box of tricks is safely in the console, and that is connected to the switch on the top.

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Old 29 December 2013, 08:01   #7
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I've just fitted a set of Lectrotabs to BP, no need to go under the deck. Pretty straightforward installation.
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Old 29 December 2013, 09:10   #8
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Bennett do two versions one is through the transom And the other with external pipes. I have the latter and they work well.
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Old 29 December 2013, 10:00   #9
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Thanks for all the replies and suggestions. One thing I forgot to mention was that my boat has telescopic transom legs that limit how far trim tabs could be placed from the centre line. I'm wondering if this would be a problem.
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Old 29 December 2013, 11:05   #10
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Thanks for all the replies and suggestions. One thing I forgot to mention was that my boat has telescopic transom legs that limit how far trim tabs could be placed from the centre line. I'm wondering if this would be a problem.
I think you'll struggle. The tabs need to be as far outboard from the centre line as poss, with the outer edge about 50-75mm in from the edge of the hull. Looking at you transom legs, they will run straight through the tab.

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Old 29 December 2013, 12:44   #11
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I run Bennett's and went for there performance tabs - they run twin rams each tab and reinforced plates , no issues so far
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Old 29 December 2013, 12:49   #12
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No, I appreciate my situation isn't ideal. I suspect that having tabs closer to the centre line will still work but will require more 'angle' simply due to leverage issues. I'm not too worried about impairments to performance (within reason); my main concern is to correct the boat's lateral trim. I often have quite a few people on board and it's fair to say my wife and I (cough cough) haven't missed a meal in quite some time.
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Old 29 December 2013, 13:13   #13
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No, I appreciate my situation isn't ideal. I suspect that having tabs closer to the centre line will still work but will require more 'angle' simply due to leverage issues. I'm not too worried about impairments to performance (within reason); my main concern is to correct the boat's lateral trim. I often have quite a few people on board and it's fair to say my wife and I (cough cough) haven't missed a meal in quite some time.
I spoke to Lenco before Xmas. From their technical dept, the advice if you can't install as per instructions, is to ensure the tabs are at least 10" from engine to prevent possible cavitation. Bennett suggest 8 inches. Other than that the further to the side of the hull the better.

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Have you reinforced them? Keith decided not to when he fitted his and they bowed pretty quickly
Think these will be fine
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Old 29 December 2013, 13:19   #14
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I spoke to Lenco before Xmas. From their technical dept, the advice if you can't install as per instructions, is to ensure the tabs are at least 10" from engine to prevent possible cavitation. Bennett suggest 8 inches. Other than that the further to the side of the hull the better.
Thanks for that. Could you tell me what kind of tabs were in the photo you posted? I can't quite make them out.
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Old 29 December 2013, 14:45   #15
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Lenco high performance 14" x 12".

Couldn't find them in the UK so had them sent over from US
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Old 29 December 2013, 15:08   #16
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Have you looked if Volvo Pentas Interceptors could fit ?

http://www.volvopenta.com/SiteCollec...System_eng.pdf
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Old 30 December 2013, 08:10   #17
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Quote:
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Have you reinforced them? Keith decided not to when he fitted his and they bowed pretty quickly...
Think these will be fine
They look great

Different style to those fitted to ours and other Ospreys. Will be interesting to see how they perform. Is there less surface area overall or are they larger than they look?
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Old 30 December 2013, 08:56   #18
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12" wide by 14" long tapered so probably similar surface area as 12" x 12".

Haven't tried them yet, will let you know
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Old 30 December 2013, 10:38   #19
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Lenco high performance 14" x 12".

Couldn't find them in the UK so had them sent over from US

Bainbridge Marine are UK suppliers
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Old 30 December 2013, 11:37   #20
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And they didn't have any or extension cables less than 20'.
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