Handling in Great Lakes chop

G

Greatlakesboater

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Aug 26, 2013
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C Dory Year
2003
C Dory Model
22 Cruiser
Vessel Name
Encore
Here on Lake Superior the waves are wind driven, that is short and sharp. My 22ft C-Dory handles it well but I would welcome input from more experienced members on the best way to trim the boat in beam seas to minimize the roll. Even in waves of "two feet or less" the roll is quite pronounced even with the flat bottom. It's a small boat so maybe it's inevitable but is it ?
 
IME the boat can be quite tippy in beam waves or wakes. The only solution I have found is to head a much as practical into the waves. This may require "tacking" of your course.

I think this is more due to the size and weight of the boat more than due to having a flat bottom. I'm not sure that the same weight deep-V would do much better in a beam sea. The C-Dory has a higher CG than a similar size deep-V so that contributes some to the rolling too.
 
At low speeds the deep V would roll more than the C Dory. At displacement speeds, the deep V would roll more.

At planing speeds, both boats would be more stable--but the C Dory will plane at a slower speed.

I have to assume that you are referring to slow speeds or a drift? Certainly the best way to handle this, is a change of direction, and change of speed, The speed may vary depending on the conditions. But the C Dory and the best options becomes of the ranges of speed.

Into the chop, the Deep V will ride better by far. But there is a pay off.
 
Greatlakesboater,

There is more to it than hull shape and speed. The location of the CG being the most important. Many inboards have lower CG's with the engine weight more centered than vessels of the OB or IO persuasion. A good resource gor pursuing questions like this, and very well done is Dave Gerr's The Nature of Boats: http://www.goodreads.com/book/show/1020 ... e_of_Boats

A fun, easy read.
 
I never notice my CD 22 being "tippy" really ever. But it is always loaded to the gills with gear and fish. I think they handle great in beam seas.
 
Two feet or less sounds like no trouble but its unpleasant in most any boat. I have found to just throttle back to about 9-12 mph in that stuff.

Also on occasion I will have a fair amount of bow weight and that actually makes the boat handle a bit better in the chop.

Just some thoughts

Chris
 
I learned my lesson last season trying to make it to a lock 30 miles up the lake. After a pounding, fan falling from ceiling ect. I never rush anymore. As others have remarked slowing down for conditions is better then beating up your boat. I also notice the sideways roll if allowing bigger waves to hit you on side. So we try to quarter them or whatever works to get where were going without continuing to be hit by beam waves. On Saturday at Lake Erie we had big rollers no breaking of waves,at first wife was liking the ride ,but after hours she felt quesy watching poles or driving,so we anchored up at an island went for a swim. On Sunday small craft advisory,so we sat on beach ,watching surf sailing guys flying on their rigs. Rip current advisory also so no swimming. Six to 8ft waves white capping,you wonder what it would be like out there,guess im not going to find out,unless someday getting caught in bad weather.
 
You don't want to find out Larry. I got caught in some rough stuff while cruising in the North Channel last year. At first I was estimating 4 to 5 footers. But after rehashing everything, and being with some others with sailing experience calling some much lesser stuff 3 to 4 footers, I'm pretty sure I was in that 6-8 foot category, with a short sequence. (Most times couldn't see past the wave ahead of us. Taking green water over the bow at 3 kts as we crested one wave just to dig into another...) We couldn't go any slower and still make way! Winds were sustained 30 kts with higher gusts. The boat held up pretty well. Can't say the same for it's occupants! :mrgreen: Colby
 
Good Times! It's happened to me too.....I've kissed the dock before in Seward!
 
Colby sounds like a white knuckle trip,I always try to watch for everything when wife is aboard. Last trip everyday was calling for afternoon thunderstorms,kept an eye on radar on I-Pad for weather. Seemed like if you wanted a perfect day ,you weren't going out. We stayed within miles of running back to sheltered marina. They seemed to just hit on land those xs. Missed all the storms,but didn't go out ten miles ,wanted to fish and get back if needed quick. Made some new friends at campground,from Kentucky ,and others near Pittsburg. Guy named Jeff says he loves the C-Dorys and plans on getting one. So I showed him the boat. Sounds like he will be a future owner. He and my wife lost there jobs after 30yrs,both went back to college for medical coding,so she was picking his brain since he has been working for 5 yrs now at it he ,works from home now. She is enjoying the season after graduating, in fall she will be trying to find employment then after 2yrs in office,she can work on the road from internet. Looking forward to camping and boating more then.
 
Doesn't get much better than camping and boating! I've seen a few times in both situations where I would have felt a whole lot better snug in my house (or basement.) Didn't plan for it to be that way, but just in the wrong place at the wrong time. Guess it goes with the territory if you spend enough time in it. :| Colby
 
I grew up boating in Lake Erie and now boat in Prince William Sound, so I do sympathize with your wind chop issues.

The CD is very narrow on the bottom and flares out substantially amidships. This may be the source of some initial instability, or tendency to roll, but I can assure you that the boat does not go over easily. Today I was out with my nephew and it was just a tiny bit rough. He wanted to "feel it." Boat turned abeam and we rocked back and forth, but he was disappointed. "I thought it would be more."

When running on step, you can do a lot to smooth things out by adjusting your speed, and course, taking the waves at a quarter, or more. If dealing with chop and not swells, trim your bow down with trim tabs and engine trim, with chop/waves astern, trim bow up.

Honestly, if a priority is running quickly and smoothly in any direction through persistent chop, there are better boats, but you will inevitably pay for it at the fuel dock.
 
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