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Author Topic:   Lenco Trim Tabs for a 21 Conquest
Treypescatorie posted 12-22-2004 08:48 PM ET (US)   Profile for Treypescatorie   Send Email to Treypescatorie  
I know there is another thread like this but my question is a little different. I am thinking of installing tabs on my boat. I dont need them for latteral stabilization because the boat is very stable that way. I want to smooth out the ride in a chop(reduce the pounding). Would pushing the bow down with the tabs improve the ride even though the conquest hull is rounded out by the bow? I've heard that with a sharper bow entry tabs will improve the ride, but not shure with the conquest hull. Will the benifits out weigh the cost and instalation time involved?
Thanks in advance.
kingfish posted 12-22-2004 11:15 PM ET (US)     Profile for kingfish  Send Email to kingfish     
dauntlass 18 posted 12-23-2004 07:02 AM ET (US)     Profile for dauntlass 18  Send Email to dauntlass 18     
I have Bennett trim tabs on my 21Conquest.They were installed after the boat was purchased so I can compare before and after performance.The tabs did very little to improve the ride of the boat.I have a Dole fin on the motor and find that by triming the motor up and down I can control bow angle just fine.I use my tabs more to correct list to port or stbd. due to passenger load.Most of the time I run with the tabs in full up position and adjust one or the other tab to control list.My tabs are 12"x8".
mustang7nh posted 12-23-2004 09:36 AM ET (US)     Profile for mustang7nh  Send Email to mustang7nh     
Can speak to the Conquest, but my Outrage 22 is much better with Lenco's fully deployed. One of the main advantages seems to be the ability to not only keep the bow down when on a fast cruise, but also to foster a slower planing speed with the same advantages of keeping that bow level rather than popping up when hitting a wave. My memory is slipping but I think I have 12X12 and I would say they are perfect. The dealer told me that I could actually go bigger if I wanted (assuming the transom would accommodate). I chose not to but I don't think you can have too much tab as they are retracted in the up position and do not produce drag.

You likely will not replace you existing tabs, but considering the 21 Conquest is likely heavier than my 22 Outrage, I would suggest a 12X12 and concur with Kingfish that it will improve ride. Installed them myself, good do it yourself project. Best of luck.

mustang7nh posted 12-23-2004 09:37 AM ET (US)     Profile for mustang7nh  Send Email to mustang7nh     
Supposed to read: Can't speak to the Conquest.....
TRAFFICLAWYER posted 12-23-2004 10:29 AM ET (US)     Profile for TRAFFICLAWYER    
Go to either the florida sportsman or hull truth sites, as tabman [Mr. Bennett] always responds with the gospel re: tabs.
kingfish posted 12-23-2004 12:26 PM ET (US)     Profile for kingfish  Send Email to kingfish     
That must by definition be the gospel according to Bennett, eh? Seems odd to direct someone who asked about Lenco tabs to a Bennett source...

Whatever - 'tis the season and all that...

JohnJ80 posted 12-23-2004 04:29 PM ET (US)     Profile for JohnJ80  Send Email to JohnJ80     
The bow, while rounded, is still 'sharper' than the flat bottom aft. Therefore, it ought to be better no doubt. As well, being able to plane slower also helps a ton.

My other advice is to contact Lenco tech support. When I talked with them about installing my tabs, they seemed to know an awful lot about tabs on a whaler.


acseatsri posted 12-31-2004 10:27 AM ET (US)     Profile for acseatsri  Send Email to acseatsri     
My 2 cents,
No matter which brand you go with, get the largest tabs that will comfortably fit on your boat. This is one case where bigger is always better. The larger tabs will give the same amount of lift as smaller ones without using them at an extreme angle, thereby creating less drag than the same amount of lift generated by smaller tabs. With Bennett M120 sport tabs (10" wide X 12" long), I'm able to cruise comfortably at 10-12 knots in my 18 OR with the bow cutting thru waves with 2 people in the rear seat.
With respect to the Lenco-Bennett debate, I ended up with the Bennetts because of past experience with them- years of trouble-free operation. Re Lenco's, although I have no direct experience with them, I just feel uncomfortable submerging electric actuators for long periods of time. With Bennett tabs, the uppermost top of the actuator will rest approximately 6 inches from the top of the transom, or about 10.5" from the bottom of the boat. You will need the Lenco edge-mounted actuators to achieve close to the same results. A plus for Lenco with this option would be there is probably less pressure on the transom with the actuator mounted so far back on the tab.
With Lenco, you end up pulling the equivalent of 6 wires thru the tunnel vs. (2) 1/4" hoses with the Bennetts (assuming mounting the pump in the console). I mounted the pump up high in the console so it wouldn't intrude on my limited storage area.
Backlash posted 12-31-2004 12:39 PM ET (US)     Profile for Backlash  Send Email to Backlash     

All good advise. IMO, all the post classic deeper V Whalers need trim tabs. I agree with acseatsri and mustang7nh that bigger is better. I have 9"x12" Bennetts on my 21' Walkaround and they work well, but I have been considering switching them for 12"x12" tabs for a little faster response. I believe Kingfish has 12"x12" Lencos on his 22' Outrage.

Whichever brand of tab you decide to go with, definitely get the 12"x12" tabs. You will be amazed at the improvement in ride quality.


kingfish posted 12-31-2004 02:18 PM ET (US)     Profile for kingfish  Send Email to kingfish     
I do indeed have 12x12's on my my Outrage 22, and I wouldn't go any smaller, particularly due to the outboard sponsons the tabs have to cross on the transom of a Classic Whaler. 12x12's were recommended (and work fine) on our 25'Parker too, but the deadrise on that boat is a straight line, so nothing is lost to an eneven water flow below the transom.
TRAFFICLAWYER posted 12-31-2004 04:57 PM ET (US)     Profile for TRAFFICLAWYER    
kingfish posted 12-23-2004 12:26 PM ET (US)

That must by definition be the gospel according to Bennett, eh? Seems odd to direct someone who asked about Lenco tabs to a Bennett source...
Whatever - 'tis the season and all that...

BECAUSE, Bennett engineers and has sold tabs to Whaler for many years and answers tab questions without respect to allegiances, [I know you have Lenco] in a responsive and knowing manner.

P.S. Duh comment by YOU!

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