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  22' Revenge Leans on Plane

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Author Topic:   22' Revenge Leans on Plane
StuZ posted 10-12-2002 04:45 AM ET (US)   Profile for StuZ   Send Email to StuZ  
I have a 1987 Revenge w/ an '87 Yamaha Excel motor (225?). It has full canvas that stays on most of the time. At most speeds on plane, in saltwater, it has a tendency to lean to the port side. It will lean towards starboard, but mostly port. It is especially pronounced when there is a beam wind w/ a 1/2 full fuel tank. All equipment is balanced properly.

Is this normal behavior? Any thought? Do I need trim tabs?

Thanx for the great forum!

Stu

kingfish posted 10-12-2002 05:22 AM ET (US)     Profile for kingfish  Send Email to kingfish     
Stu-

Deep V's (your boat is classified as such) have a tendency to "lean" into the wind. The more wind surface your boat has, like cabin and canvas, the more pronounced that tendency will be. In addition, there's always some degree or another of "torque twist" in which the boat reacts to the direction of propeller spin; typical prop spin is clockwise, the reaction to which would lower the port side.

Trim tabs would absolutely give you control over those conditions, as well as over differential weight loading, etc. with the additional benefit of enhancing your ability to tuck the bow down to smooth out the ride in choppy conditions.

Lots of past discussion here about trim tabs if you search through past topics. I have electric tabs on my Outrage 22 and love them. They are more responsive than hydraulics and are easier to install.

kingfish

Peter posted 10-12-2002 07:52 AM ET (US)     Profile for Peter  Send Email to Peter     
Stu

I have a 1986 Revenge with the full canvas enclosure. When the canvas is up, the lean is much more pronounced. I believe that the reason for this is quite simple, the Revenge has much more vertical surface area than the Outrage, particularly with all the canvas up, and the wind pushing on this surface in a beam sea, for example, tends to push you off course. To counter this you have to steer into the wind slightly to maintain your course. By steering into the wind, you are turning the boat and deep vee boats have a tendency to lean into the direction they are turning. Of course the distribution of weight and propeller torque will either enhance or mimimize the lean.

While I have hydraulic trim tabs on my Revenge to level off the lean, the electric tabs Kingfish has will do the job just as well. The advangtage of the electric tabs is that you do not need the hydraulic pump. In my case the pump is mounted in a Whaler battery box mounted in the stern. Hope this helps.

jimh posted 10-12-2002 08:07 AM ET (US)     Profile for jimh  Send Email to jimh     
The propeller torque is probably helping the boat to lean to port, and it may also be helping to not lean so much to starboard.

I like this "lean into the wind" theory. I see the same effects on my Revenge, although with twin engines I don't see as much properller torque.

Clark Roberts posted 10-12-2002 09:05 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
In addition to the engine/prop torque effect, the "lean" is often enhanced by "steering" effect caused by the necessity to steer slightly into the wind to maintain a straight course... motor is slightly turned to offset wind vector ... tabs will do the trick! Happy Whalin'... Clark... Spruce Creek Navy
jimp posted 10-12-2002 11:48 AM ET (US)     Profile for jimp  Send Email to jimp     
StuZ -

I have a 1990 Revenge 22 WT with tabs (InstaTrim by Boat Leveler came with the boat). Unless you want to keep shifting your crew, you need tabs.

As to the question, "Is this normal behavior?" Yes it is for a boat without trim tabs.

Whaler addressed "leaning into the wind" in one of their 1960's catalogs. They said that the boats would do it and the best way to counter it was to shift the crew around. This was when they had 13s and 17s. My '82 Montauk used to lean into the wind also.

JimP

kingfish posted 10-13-2002 09:18 AM ET (US)     Profile for kingfish  Send Email to kingfish     
Peter-

So you have a set up that looks like you have dual batteries, but one is really the housing for your hydraulic pump? Nice solution and pretty clever arrangement!

Peter posted 10-13-2002 11:59 AM ET (US)     Profile for Peter  Send Email to Peter     
Actually, I have two batteries back there as well so it looks like I have three batteries. Prior to the repower, it looked like four batteries because the OMC oil tank was inside a Whaler battery box too. The Yamaha tank didn't fit. :(
kingfish posted 10-13-2002 07:26 PM ET (US)     Profile for kingfish  Send Email to kingfish     
Geez, I've got an OMC oil reservoir and thanks to Dan Harden I've got a spare Whaler battery box.

Hold on, Bessy, I think I'm having an idea!!

David Ratusnik posted 10-13-2002 10:12 PM ET (US)     Profile for David Ratusnik  Send Email to David Ratusnik     
Stu- Everything you write screams out for a set of trim tabs. Changes the boat big time. Plenty has been written on this Forum and others re- different brands of tabs. Rec study up - then buy a set. Mine Bennett's on a 22'OR '86 with a J225hp.

Today- 3 hrs watersports with the wife and 3 kids. Kids moving all over the Whaler- port to starboard, bow to stern etc., you get it, a can of worms. With 3 kids aboard most of the time you learn to work the tabs. Smooths, squares away a 22' boat. Don't leave home without a set of tabs. Good Luck David.

StuZ posted 10-14-2002 03:51 AM ET (US)     Profile for StuZ  Send Email to StuZ     
THANX everyone! Looks like trim tab installation will be addded to my winter project list.

Stu

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