swing keel cable vibration noise

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Joe Forward

For the past several years we have periodically had to deal with a loud vibration that I understand is caused by the keel cable vibrating in the water and is then transmitted to the hull. We have tried various techniques to cure this, but the only thing that totally alleviates the noise is to raise the keel to about 1/3 of its depth. Unfortunately, this makes it difficult to sail into the wind and isn't real safe in strong winds. A couple of years ago I called the manufacturer and they didn't really want to admit that there was a problem and the possible solutions were not very helpful. One dealer I talked to seemed to think it is a faily common problem with older models -70's & '80's. Any helpful hints out there?
 
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John renfro

hummmmmmmmmmmmm

hello Joe, the company didn't want to admit to a problem because the hum is not a problem, all 22s with a swing keel do it. the hum is a quirk or eccentricity of the design. the hum lets you know you are scooting along at a good speed, and your cable is still attached to the keel. john
 
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Al

a well tuned rig

the term used is thrumming. i relly on it to tell me i'm moving and when we really get going the external halyards start thrumming also. ahh it's music to my ears
 
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Campy

Slack off

That's what I do, I slack off all the way. and the thrummmmmm goes away. Camp
 
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matt christenson

thrummmmm

the thrummmmm is the catalina 22 natural knot meter. she always starts to humm good aroud 4.5 knots and I lose it around 6 knots. But adjusting the cable once the keel is locked down will stop it. I have grown to like it. The boat is talking to yah, with all her creeks and moans, however little they may be. matt
 
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Adrian Appel

Keel cable vibration

Drop your keel until the cable is slack and lock it, you should not have any vibretion
 
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Mike

Thrumming problem solved

I bought a guitar for my wife and a small set of bongo drums for myself. We adjusted the instruments so they're in tune with the keel cable and now we have a perfect three part harmony. The best part is that we don't kill the battery using our radio anymore. Just be sure to get yourself an instrument that: (a) you can play one-handed, and (b) has a neck strap. You'll need at least one hand for the tiller.
 
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Charles (Randy) Monaghan

It worked for me!

Hi! Sometimes I like the humm too, but it's nice to know a way to stop it if you want to. I read that by lowering the keel all the way, and then cranking it up a turn or so, tightening the keel lock a little under the forward port dinette seat, and then cranking the cable back out to give it some slack, will stop the humm. I don't know if doing it that way is a good idea or not. I don't know why it wouldn't be. What I do know, is that it works. I'm a new sailor with lots to learn. 80 Catalina 22 - Slow Dancin Sea Ya! Randy
 
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