Lenco 9x12 edge mounts and permatrim

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Merry Christmas all!

Want to add Lenco 9x12 edgemount trim tabs myself. That is what will fit best and easiest for me to install.

They are only for side to side leveling as I already have the permatrim on the outboard.

Can anyone comment on how the 9x12's work for side to side leveling on a 22 cruiser?

Thanks!
Stefan : :xlol :xnaughty
 
Merry Christmas Stefan,

They work great as I had Bennett 9 x 12 Sport Tabs on my 22. When I had 2 on the port they sure took care of leveling the boat. I didn't have Perma Trim on the twin 40s so I used them to get the bow down, too.

You won't go wrong and they are easy to install, too.

Good luck and have fun.

Patrick
 
They work fine, I'd like mine to have an indicator to see what position they are in, may add that. Don't have a permatrim on my ETec 90 either.

Charlie
 
Not where I can measure now, but I believe that is about the size I have. I would consider going larger, extending farther aft and VERY firmly mounted. I think they would be more effective, and I could provide a stepping spot for re-entry into the boat should I take an unplanned overboard experience. I too have twin 40's without the Permatrim's, and can easily see stepping onto the lower unit and the up onto trim tab before reaching the splashwell.

Just a second use for something on the boat.

I do think the larger surface area would allow for better attitude control without making quit so much drag.

Harvey
SleepyC :moon

IMGP6699.sized.jpg
 
thanks all,


Harvey,
Does the line at the top of the tab come through the transom inside the splash well? or below the splash well behind the fuel tanks?
 
Just at the bottom of the Splashwell. Not sure of the technical name but there are the little "half shell, scoop covers" over the lines. Does work as a minimal secondary splashwell drain at each corner.

You can just barely see them in the picture.

Harvey
SleepyC :moon
 
I just took the wires over the stern and through the boot into the starboard lazarette. Used wire guides to keep wiring in place and looking neat.

Jay
 
After thoroughly researching trim tabs on this site and on mfg's site, I'm convinced, I think, that there lies some some confusion (at least amongst myself) as to the sizing of trim tabs.

Lenco and Bennett seem to measure them differently.

Ie. a 9 x 12 trim tab from Lenco is 9" out from the transom and 12 inches along the hinge.

Bennett has the numbers reversed I believe. ie. a 10 x 12 Bennett trim tab is 10 inches along the hinge and 12" out from the transom.

If this is so, it is very hard to judge who has what, and what works well, in terms of Lenco.

hmmm...
:|

I like the idea of taking the wires over the transom Jay. Thereby not drilling through the transom.
 
That's a good question.

"Lenco and Bennett seem to measure them differently.

Ie. a 9 x 12 trim tab from Lenco is 9" out from the transom and 12 inches along the hinge.

Bennett has the numbers reversed I believe. ie. a 10 x 12 Bennett trim tab is 10 inches along the hinge and 12" out from the transom.

If this is so, it is very hard to judge who has what, ..."
Click to expand...

I think that square inches of surface area is what makes the difference; more being more effective than less. However. it seems to me that a longer tab might be more effective than a wider one, given the lever arm length advantage, but I am guessing, and should leave the "right" answer to the mathematicians, engineers and physics pros here to come up with that. :oops:

Harvey
SleepyC :moon

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A long narrow arm will provide a lot of leverage. However from an engineering standpoint, the longer the arm the more difficult it is to engineer a way for the hardware to secure it onto the boat. They will also deflect a lot while under load which isn't good. Trim tabs are a really good upgrade.
 
Yes, on all the above!

A few members* have made the comment before that BOTH LONGER AND WIDER ARE EVEN BETTER! (*Red Fox and 3rd Byte, for example.)

The benefits of Permatrims and Trim Tabs are many: for not only attitude control and lateral balance, but also for a smoother ride from the apparent lengthening of the boat effect and also from earlier planing and planing at lower speeds.

Knowing this, if I were setting up a new to me boat, I'd pick somewhat oversized trim tabs and hydrofoils, and especially so if I frequently overloaded the boat for cruising.

The oversized foils will add a little drag and take a mph or two off the top end, but pay for themselves in better overall performance.

And big foils are cheaper than two-foot-itis, too! :lol:

Joe. :teeth :thup
 
I am going to make a observation about the width vs length of trim tabs but first I wll say that the Lenco trim tabs on both of my cdorys have worked with our fail. I installed the lager ones on my 27 and just love them.

10 x 12 is the same as 12 x 10 BUT I would take wider tabs every time. Water flows as Bruce Lee was found of saying. A longer but thinner tabs is going to allow water to flow around it the farther from the stern it is. A shorter but wider tab is engaging more water closer to the stern, where is is compressed and unable to FLOW around as much. Now that is just how I look at it and the only way to really tell is to hire some lab to do the work but I am willing to bet I am right. Why? because I have driven a lot of cdorys and have noticed that the ones with the longer tabs, like my 22, need more adjustment or movement then the one with wider tabs, like my 27. Both will do the job just fine and the deciding factor just maybe how much room you have between your kicker and your hull anyway. The tabs on my 27 are to larger and if used improperly can cause handling problems, but I just don't use as much trim most of the time. I would always go larger because you can choose not to use as much trim but you can't add trim to a small tab. Just like motors get the biggest that will fit and throttle back.
 
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