SWING KEELS GOOD or BAD? - Page 2 - SailNet Community
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post #11 of 16 Old 02-01-2013
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Re: SWING KEELS GOOD or BAD?

I had trouble in my sailing area, in that, I harvested a lot of weeds on the swing keel cable.

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post #12 of 16 Old 02-01-2013
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Re: SWING KEELS GOOD or BAD?

I love my swing keel boat. I dont have worries about it failing and swinging down uncontrollably because it is always down when I'm underway. When I hit a random boulder in 8 feet of water it swung up and didnt wreck anything. just took off some paint. My draft with keel up is 2ft 6in and 5ft 6in when down. That puts the weight right where it needs to be so it performs very well in strong wind and bigger waves. I can also trailer my boat easily. As far as the moving that much weight around, I installed an electric wench where the old hand cranker was so all I have to do is press a button. I also keep an extra wench and battery on board just in case. The wench gets used to raise and lower my mast so I can do it single handed. I dont think I would beach it but I can get close enough to shore to walk in without getting my shorts wet. A huge advantage is not having to depend on someone else and have to pay them to pull it out of the water. If there is a big storm on its way or I just want to give her a proper bath hook up the trailer and pull her out. I always dream of a bigger boat but 26 ft is definately big enough for my family and a few friends. It also fits my finances well.
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post #13 of 16 Old 02-01-2013
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Re: SWING KEELS GOOD or BAD?

I think swing keels good or bad is misleading. The use is what makes the keel good. one type of keel is not a bad thing. Dingy bad / blue water boat good ? The swing keel will let you take that type of boat places and do things others will not go to or do as easy possibly not at all. I like my catalina-22 swing keel and I think for most of my use fresh water lakes it fits better than the other two options. I do not know sales and resale longevety but my opinion is the swing keel catalina-22 is more in demand in this environment than the other two. I see more swing keels in my area. Good Day, Lou
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post #14 of 16 Old 02-01-2013
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Re: SWING KEELS GOOD or BAD?

There is a lot of good advice here, but also a lot of sloppy jargon. Swing keels, centerboards and daggerboards are three (very) different things. They have one trait in common- the ability to vary the draft of the boat - but they each implement that trait differently and with different trade-offs.

The keel on a sailboat contains the primary ballast for the boat. With a Swing Keel, that keel (not surprisingly) swings. The arrangement differs boat to boat, but the basics are that a cable lead to the trailing edge of the swinging keel hauls the keel up and down (via a winch of some kind), while the trailing top edge of the keel is affixed to the hull with a single pivot point. While retracted, some swing keels are contained completely outside the hull; some retract into a recess either partially or wholly within the hull. Either way, movement of the swing keel significantly changes the boat's center of gravity and resulting stability. Well known examples of swing keel boats are the Catalina 22 and 25.

A centerboard boat is much like a swing keel boat with one big difference: the centerboard does not contribute significantly to the boat's stability. It contains no ballast. The Oday line of trailer sailers (22, 23, 25) embody this design concept. As one of the posters above noted, the ballast for these types of boats is in the boat itself, encapsulated in the hull in a stubby keel. The centerboard pivots in and out of a slot within this keel. Because its not very heavy, the tackle needed to move a centerboard is much less complicated and easier to maintain than its swing keel cousin. Lots of dinghys that have no ballast beyond the weight of the crew also have centerboards.

A daggerboard is a completely different animal altogether. Daggerboards are unweighted fins that move directly up and down through the bottom of the hull. They can be as simple as the arrangement on a Sunfish, where the daggerboard has a handle on top of it that you simply grasp and pull (or push) to move the board to its desired depth. As you can guess, daggerboards are far more common on smaller dinghy type boats.

One more type of moveable keel is the "retractable keel", that has elements of both the daggerboard (moves straight up and down) and the swing keel (contains the boat's ballast). On the RK series of boats from Seaward, the daggerboards have lead bulbs on the bottom containing the ballast for the boat. Of course, Seaward has devised an ingenious power system to extend or retract the keels/daggerboard as needed. Lets you get into the shallows, but still have a high aspect keel with the ballast down as low as you would have on a fixed keel.

I have an Oday 23, and find the keel/centerboard combination to be the best compromise for me. I get the convenience of variable draft, virtually no maintenance of the mechanism, and the comfort of knowing that the ballast for my boat is encased within the hull and ain't falling off.
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post #15 of 16 Old 02-01-2013
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Re: SWING KEELS GOOD or BAD?

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Originally Posted by CarbonSink62 View Post
IMHO fewer moving parts underwater is better; when I was looking for a Catalina 25, I didn't even look at the swing keel models.

Failure mode 1: the cable breaks while the keel is down and you are stuck in deep water.

Failure mode 2: the cable breaks while the keel is up and the keel (1900#) swings down until it hits the stop (which might not). This could let the green monster into the people tank.

Failure mode 3: The boat surfs down (or falls off) a wave and the keel retracts a bit; at the bottom of the wave, the boat stops but the keel keeps going. See #2 above.

Centerboards aren't as problematic, but I still prefer a solid keel.
Dont forget Failure mode 4, my particular case actually: You leave the board down at dock thinking 1/4 from shore is deep enough. Low tide buries your stick in the mud. Boaters who cant read or dont care zoom by creating big wake. Lateral forces break your wedged centerboard in half.
I have a brand new centerboard- Not by choice.
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post #16 of 16 Old 02-02-2013
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Re: SWING KEELS GOOD or BAD?

All very good points, BUT they almost all fall into what I would classify as human error. All but "failure mode 3" are easily prevented or remedied with a little prior planning. The majority of cable/pin/trunk issues arise from lack of maintenance. Yes, it is more work, but in my case for instance, I can't have a full keel boat if I want to sail on our families lake in Ontario. In late summer the water level in our bay has dropped as low as 2 feet at the dock. We can't even launch a full keel sailboat at the boat launch. Properly maintained, many of these have lasted decades with out an issue. I am planning on replacing my keel pin, brackets, and cable this year. My boat just turned 30 years old, and I plan to venture out into more challenging waters soon, so I want to ensure everything is perfect working order. For me it's a small price to pay to be able to sail where I want to! The other huge plus is I can easily take my boat and my family anywhere I get the urge to sail. So in my opinion, swing keels are great, but it really comes down to what your needs are. I see a full keel sailboat, and see it as limiting to my sailing adventures...

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Trailer-sailing our way from Pennsylvania to Ontario Canada and soon the Chesapeake Bay!!!
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