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Author Topic:   Proper trim
alanfujii posted 09-03-2002 09:11 PM ET (US)   Profile for alanfujii   Send Email to alanfujii  
I have a 2001 Conquest 26 with twin 200 hp Yamahas. The problem that I have is trying to control the ride so my wife will enjoy boating. It seems that I either can go slow <10 mph or fast >22 mph. I been trying to go below 20 with no luck. I have put the trims tabs all the way down and adjust the rpms to where I seemed to be at the edge. We'll go along for a bit and then we'll hit a wave and I'll drop off and the boat slows to where it's struggling to keep the speed. I'll try a little higher on the rpms and then the boat will start to pickup speed and take off. It's very difficult to keep the boat at a nice steady comfortable ride. Is this achieveable?
Bigshot posted 09-04-2002 10:07 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Nope!

You are fighting the boats design and engines which is not good. In a 26' you should be able to do 35mph and still be smooth. Where do you live....Oregon Inlet:)That is a nice setup that can move pretty good, let it do what it was designed to. I find that going faster usually makes the ride smoother in chop. Maybe a Trawler is in your future or do what I would do.....leave her home:).

jimh posted 09-04-2002 09:07 PM ET (US)     Profile for jimh  Send Email to jimh     
The performance you describe is not unusual. Your Whaler hull reaches maximum displacement speed around 6-MPH. Going faster than than requires much horsepower and creates a huge wake.

Many Whaler hulls do not maintain plane at speeds below 20-MPH. This is a function of the hull design, the weight distribution, and the ability of the engine to produce enough thrust at slower crankcase speeds.

If you have very powerful engines and a proper propeller, you may be able to develop enough horsepower to keep the hull on plane at lower speeds. Much depends on the engines and where their power band is. If you have 200-HP engines but only get any power at high RPM, you may not be able to keep the boat on plane at lower speeds.

Even with relatively light boats with plenty of power (WHALE LURE comes to mind with 450-HP on a light, open 25-OUTRAGE hull) it is often difficult to maintain plane at speeds below 20-MPH.

With your Accutrack Hull and the extra weight of the CONQUEST, I would expect you have a very pleasant cruise at 22-25 MPH.

The farther aft you sit in the boat the more pleasant the ride. Have your wife sit in the rear of the cockpit if she does not like the motion on the boat at 22-25 MPH plane.

Also, you should anticipate having to make frequent throttle adjustments in response to wave conditions. If you get stuck trying to climb the back of a wave to get back to planing, you will have to quickly apply enough power to climb over the wave. Then you will quickly have to reduce power to maintain your slow plane.

The throttle is not a "cruise control" type of device--it just sets the engine to a praticular throttle. Like your car when climbing hills, going up and over waves will require more throttle than cruising on level ground.

David Ratusnik posted 09-04-2002 09:08 PM ET (US)     Profile for David Ratusnik  Send Email to David Ratusnik     
alanfujii- This situation has nothing to do with with rpm's or mph etc. -- non-tech in otherwords. Hell she's riding in a killer boat- Conquest (cuddy), 26', 400 hp Yami's. Trawler-- that's nuts- she doesn't like the water. She's probably a greaaaaaaaat gal and you need to focus on the Opera and Broadway Series- that's what I do, back and forth each year with the series. You do what she likes and then she plays watersports, boating ETC with you. If you have kids get them involved with watersports (tubes, ski, slalom etc.), then the boat works for your lady. (.03, .03) Good luck David
Fishcop posted 09-04-2002 10:11 PM ET (US)     Profile for Fishcop  Send Email to Fishcop     
Alan,
Try adjusting the rpm's and trim until the boat is on plane. The sea conditions will dictate how fast or slow you can go. As stated in other posts, you will constantly be adjusting the rpm's to move ahead of the swell and to "surf" down the other side. The more time you spend at the helm, the better you will be at finding the "sweet spot" on your boat. Just remember, no boat can do it all.
If you find someone that wants to spend time on a boat with you, do what you can to keep them happy. All the better if it is your wife or children.
Just my two cents.
Andy.
JoeH posted 09-05-2002 01:19 AM ET (US)     Profile for JoeH  Send Email to JoeH     
As Andy mentions about keeping the family happy, you could let her drive. Please don't ban me as some kind of heretic. She gets a feel for whats involved with maintaining control of the boat, you get tend to other things, sight seeing, perhaps enjoying a frosty beverage. Joe
Bigshot posted 09-05-2002 10:28 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Nah.....leave her at home!

Take me instead:)

I'll trade you my Montauk, planes nicely under 20mph......she'll love it.

Swellmonster posted 09-05-2002 04:36 PM ET (US)     Profile for Swellmonster  Send Email to Swellmonster     
Nick,
Ya beat me to it!

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