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aftermarket add on keel

 
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Tom C-Dory



Joined: 11 Jul 2022
Posts: 4
City/Region: Lake Superior
State or Province: WI
PostPosted: Wed May 21, 2025 10:57 pm    Post subject: aftermarket add on keel Reply with quote

I have a 25' C-Dory Cruiser with 150hp Evinrude Tech. that we cruise on Lake Superior. The Lake usually has wind which seem to push the boat sideways. Has anyone ever added a keel to the flat bottom stern of the hull to prevent less sideways movement. Any thoughts. Thanks.
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ssobol



Joined: 27 Oct 2012
Posts: 3577
City/Region: SW Michigan
State or Province: MI
C-Dory Year: 2008
C-Dory Model: 22 Cruiser
Vessel Name: SoBELLE
Photos: SoBelle
PostPosted: Wed May 21, 2025 11:11 pm    Post subject: Re: aftermarket add on keel Reply with quote

Tom C-Dory wrote:
I have a 25' C-Dory Cruiser with 150hp Evinrude Tech. that we cruise on Lake Superior. The Lake usually has wind which seem to push the boat sideways. Has anyone ever added a keel to the flat bottom stern of the hull to prevent less sideways movement. Any thoughts. Thanks.


One of the selling points of a C-Dory is shallow draft and fuel efficiency. Adding a keel would counter those goals. There are plenty of deep V boats or boats without deck houses that are better in a crosswind. If that is your priority, then a C-Dory might not be for you.

Pick your docks that are facing into the wind, or use the wind direction to push your boat against the dock. Yes, docking a C-dory in a crosswind is can be a challenge. On my 22, the bow wants to turn downwind smartly when the steerage way comes off.

Every boat design is a compromise.

FWIW, adding a keel (like a dagger board) may help in a crosswind, but wouldn't significantly change the hull shape to improve the ride. To be helpful, the keel needs to be at the center of rotation. Having one on the stern is not going to help much.
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thataway



Joined: 02 Nov 2003
Posts: 21428
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
PostPosted: Thu May 22, 2025 10:44 am    Post subject: Reply with quote

a keel would increase turbulence around the prop/ props Deep keel boats run fast--more semi displacement speeds.

The keel would increase issues in a cross current, but minimal resistance in drift from wind forces. ("Drift" is wind, "set" is current which cause leeway.)

A daggerboard forward might serve some purpose, but most boats use a bow thruster rather than a dagger board forward, How do you control the dagger board? (There are some expensive ways, but none cheap and simple, and you have lost a lot of functional space inside the boat.

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Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL
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robhwa



Joined: 04 Dec 2013
Posts: 297
City/Region: Anderson Island
State or Province: WA
C-Dory Year: 2003
C-Dory Model: 22 Cruiser
Vessel Name: Marcia C
Photos: Problemadela
PostPosted: Thu May 22, 2025 11:58 am    Post subject: sideways movement in wind Reply with quote

I live in South Puget Sound, and, I have to say, this area has the most inconsistent wind patterns of any other place I've lived (Gulf coast, Chesapeake Bay, New Hampshire). I gave up regular sailing here. It is just not much fun most of the time. I still sail a Hobie Tandem Island when I see steady wind (Windy is helpful), but often finish the trip motoring, peddling or paddling back. In order to dock easier in wind and "sit" in one place in wind while fishing, I put a Minn Kota front-mount trolling motor with "spot-lock" on my CD22. It helps a lot, and after you drop it, it can retrace a previous, saved route right into the slip. I don't know of many other people that have done this on CD's, but I'm quite a fan of front-mounted trolling motors now. Spot lock will hold you in one place, particularly if the wind, tide or current is mostly in one direction. Major downside is getting on the bow to deploy/stow it, and you have to be careful not to hit things with it when docking.
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Rob Harrison & Marcia Ciol
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2003 22 Cruiser "Mar-C"
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