trim tabs
 

couple of questions for you guys, i notice on some boats tabs are mounted horizontally and some are even with the bottom of the boat parallel to the actual v on the bottom what is the correct way to mount? also how difficult are tabs to mount in general, just drilling and some hoses/ wiring or am i nuts?

looks to me like horizontal would be more efficient

I have been told mounting them horizontally will help a boat that chine walks without pushing the nose down. Increasing tab will only allow the outside corner of the tab into the water allowing more stability side to side.

Makes sense to me when I think about it. Am I and the person that told me crazy?

The short answer is they are relatively easy to install. For many years Velocity mounted tabs at 1/2 deadrise and installation instructions with kit recommends mounting even with bottom.
Recently, increasingly more people and companies are mounting them horizontal on the faster boats.

As with many things related to boat set up there are different schools of thought and a lot of follow the leader trends.

It seems the function of trim tabs has expanded from assisting in control of the boats attitude to include help in reducing chine walking.

Jim, I just realized you're in Austin. Where do you live? I'm at the far north end of Sandy Creek in Jonestown.

Don't put them even with the bottom of the boat if you got that route. You want them up about 1" so that when they are in the up position you do not have all the drag.

Audiofn and Joe,
sorry i wasn't clear. " at angle angle even with bottom up 3/4 of an inch is what is suggested." That has long been the norm but not so much any more. I personally like the 1/2 deadrise on outside corners myself.

Griswald,
I'm am pretty close to you, I am off Anderson Mill in NW. I find myself in Jonestown frequently during the season and would like to find the right piece of property there somewhere.
I have contact info in my sites found in profile.
I'm always eager to meet avid boaters.
Best wishes,

On the shorter boats I like them at the same angle as the bottom, since this effectively lengthens your running surface. If i was out for all speed, and very little control, or had a longer boat with big K-planes then I would mount them horizontally.

Jim, when you say "half Deadrise" I assume you mean horizontally level? Sorry, I am a self taught shadetreee rigger, and not in tune with the technical terms.

Rick

No, I like what Velocity has always done. By 1/2 deadrise is say 11 degrees on a 22 degree, or 12 degrees on a 24. The half to horizontal position. I use tabs with lifting the stern in mind when flying. I think horizontal is wrong. Tabs slaps the water, you lose some fine adjustment, you side load the plates and things like cylinders and pins break more often. I believe they are there to control attitude. You drive it proper to keep from chine walking.

Cool,

I never thought of that:D

Rick

i have a velocity, chine walk is a little bit of a problem but, my bost lists to port as soon as you leave the water, i was told tabs would help.

mercman,
i think i get what your saying, angle them in between the deadrise and a horizontal line across the stern, right?

i figure when i do it i'll contact velocity and the tab manufacturer, but wanted to get some real world advice as well, thanks!

Tabs help you to enjoy the boat more. Do you use or have you tried a left hand prop?

its a right handed prop, how would you switch to a left handed?

Try to borrow the same prop in a left. With a bravo you can run it in reverse to try it and see if you find any advantage to it. If so its pretty easy to switch the cable in the controls if and when you get a prop to keep. I didn't mention as a substitute for tabs. Just a side thought.

Jim, you've got mail at Yahoo.

actually,

even a redneck like me would put the tabs on the stern:D

stern thats what i meant typing in between thinking and working......:cool-smiley-027:

Joe the left hand prop slowed me down by 2mph. Here is how my tabs are mounted. Sorry the picture isn't better.

bill, yours are parallell to the v?

Yes & they are up 3/4- 1 inch. Just make sure you get a good tab

Some one explained the horizontal tab on one of the other posts. As I recall the speeds were higher that way and turning at speed was better. There was a handling down side but for the life of me I can not remember. The thread was in the General area as I recal. You may be able to find it.

Jon

http://www.offshoreonly.com/forums/s...orizontal+tabs

Found one of thrm

A bunch of hear say and personal preference. We all have our own.
Horizontal has advantages in light seas and not so much in heavy. It seems they first started going that route when V's went fast enough to chine walk.I first noticed early '80's.
Kind of like training wheels for chine walkers.
Ever since the Zenetics boat every one followed suit.

This is an interesting topic. I was also looking into tabs for my 25' Eliminator Eagle. It will chine as well when i trim up for top speed. It's fine until i start to hit some chop. I run on small lakes, so most of the chop isn't any larger than 1-2's. I currently try and bump stear the chine walk out, but havn't been 100 percent successful at that. I was hoping the tabs would settle down the hull...............

cloudmaster,
It will. Your steering and /or play in drive will also contribute to walking.
Can you wiggle the drive back and forth when its on the trailer or lift or do you already have hydraulic?

i got a set of 280s off my 33 daytona with 32 hours there 20" wide ,22" long & bracket is 16" tall with pumps & hoses , hardware $ 1000.00 and i'll split the shipping with ya

NICE DEAL. someone should jump on that.

Thnx JIM and have a great weekend:cool-smiley-011:

why are you selling?
1000 is the best you'll do?

Joe That's a good buy & they will really help you settle the boat down

We took them off the ELIMinator cause they were too small and we had to put the DANA MONSTER picnic table tab on there to help with the porpouise so it was'nt like riding the BULL at GILLYs .. There $2500.00 at TEAGUE or BOOSTPOWER so so 1000.00 is real fair :cool-smiley-011:

I paid less for my granite countertops than Dana picnic tables. But they are sweet.

I for one would be very interested in what Velocity and the tab manufacturer say on the subject please post that info when you have it !!! thanks

AS SOON AS I GET A SET I'LL POST IT, I SLEPT ON RUNNING HOTS AND LOST THEM...:hitfan:

so on a 24' boat with an 8'6" beam, would it be a better idea to mount them in line with the stern to extend the running surface ?? I run in 2' to 3' chop usually. I am getting ready to mount a set of 280s on a new transom and just want to make sure I am doing it the right way. I would like to have 380s in the future. Is there a difference in how you would mount them if you had 280s vs. 380s ?? thanks guys

From the factory on my 320 Velocity. Hope this helps.

Port
http://i265.photobucket.com/albums/i...DSC_0004-4.jpg
Starboard
http://i265.photobucket.com/albums/i...DSC_0005-3.jpg
Starboard
http://i265.photobucket.com/albums/i...DSC_0006-3.jpg

The 380 plates with fit the 280 housing so all you have to do is swap plates not the whole thing.

Hey must be a small countertop , around this neck of the woods countertops are 14 to 20 K and the new Dana monster tab delivered was 9000.00 from Teague :D

Your right, the countertops were 14K but if you got two boats.

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"2003 320 Velocity From the factory on my 320 Velocity. Hope this helps. "


THANKS EVERY BIT HELPS!