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post #11 of 23 Old 04-22-2019
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Re: Singing ships????

The swing keel cable on my Catalina 22 vibrates sometimes. I just crank the winch a half turn one way or the other. Tightening or loosening it puts it on a different frequency and the hum goes away.

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post #12 of 23 Old 04-23-2019 Thread Starter
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Re: Singing ships????

I had tried playing with the cable. I figured that completely loosening it would help but there was no change. Same with adding tension or even slightly raising the keel. I'm guessing it'll be something that I just have to figure out and live with. I'm hoping that it'll go away with more speed as I was going awfully slow when it started. Strange that it was only when I was on a port beam reach and never while on starboard.




So, another question if y'all don't mind. My rudder sits on two posts. I have a hardened 3/16" pin going through to keep the rudder from hopping out. I bent the pin. The waves were not that large but the frequency of them made it so that I'd dive into the bottom of the trough instead of riding them down. The rudder would try to jump off of the rods as it floats. Would adding a spacer keep the rudder from bending the pin?
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post #13 of 23 Old 04-24-2019
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Re: Singing ships????

as said, it's the keel cable, perfectly normal, you'll get used to it, just hum along with it!

(be sure to inspect the integrity of the cable, winch, and attachment points periodically)
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post #14 of 23 Old 04-24-2019
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Re: Singing ships????

Depending on the sound, it could be the keel cable. Or you could have snagged some debris like a branch or weeds and be dragging it along.

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post #15 of 23 Old 04-24-2019
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Re: Singing ships????

Quote:
Originally Posted by Locke View Post
I had tried playing with the cable. I figured that completely loosening it would help but there was no change. Same with adding tension or even slightly raising the keel.
Huh. Thatís really odd. Makes me think itís something other than the keel cable.

At least with mine it only vibrates at one harmonic, so if it starts I can either tighten or loosen it to change the harmonic and it stops.

Usually I leave it a bit loose; it probably causes extra drag but at least itís quiet.


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Depending on the sound, it could be the keel cable. Or you could have snagged some debris like a branch or weeds and be dragging it along.
Iím having a hard time imagining weeds being tight enough to sing. A branch I suppose could.



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Originally Posted by Locke View Post
My rudder sits on two posts. I have a hardened 3/16" pin going through to keep the rudder from hopping out. I bent the pin. The waves were not that large but the frequency of them made it so that I'd dive into the bottom of the trough instead of riding them down. The rudder would try to jump off of the rods as it floats. Would adding a spacer keep the rudder from bending the pin?
I canít really visualize this, so I canít comment on the spacer idea, butÖ

Maybe your rudder is making the noise? If itís loose in its gudgeons it could vibrate. And if anything about it is asymmetrical that could be why it only sings on one tack.
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post #16 of 23 Old 04-24-2019
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Re: Singing ships????

It's your audible speedometer. Quite useful when trimming your sails. You'll grow to love it.
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post #17 of 23 Old 04-24-2019
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Re: Singing ships????



didn't think this would go on, but it is a forum

Now that we are in the analyze stage... I know some of this you answered in the original post

Does this singing happen in various situations

does it happen on a port tack and starboard
downwind? I know it didn't happen both ways, but before you tacked were you going the same speed on the Starboard Reach

Have you experimented these factors since?

I'm a little surprised that it doesn't happen in both directions --- assuming you are going the same speed?


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post #18 of 23 Old 04-24-2019
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Re: Singing ships????

^^^ I think Minnesail made a good point about the loose rudder. My Prindles rudders hum pretty good over about 10 knots. I slow the boat down based on the rudder humming because it's a sign they are about to kick up. It can be on either tack or even broad reaching. Conditions when the humming is loudest varies, but best case scenario we need to depower just shy of 15 knots on any point of sail, or rudders hum and kick.
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post #19 of 23 Old 04-24-2019 Thread Starter
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Re: Singing ships????

Quote:
Originally Posted by Sal Paradise View Post
Depending on the sound, it could be the keel cable. Or you could have snagged some debris like a branch or weeds and be dragging it along.
No weeds in that lake, branches are possible but highly unlikely.

Quote:
Originally Posted by Minnesail View Post
Huh. Thatís really odd. Makes me think itís something other than the keel cable.

At least with mine it only vibrates at one harmonic, so if it starts I can either tighten or loosen it to change the harmonic and it stops.

Usually I leave it a bit loose; it probably causes extra drag but at least itís quiet.




Iím having a hard time imagining weeds being tight enough to sing. A branch I suppose could.





I canít really visualize this, so I canít comment on the spacer idea, butÖ

Maybe your rudder is making the noise? If itís loose in its gudgeons it could vibrate. And if anything about it is asymmetrical that could be why it only sings on one tack.
I didn't feel any vibration in the tiller handle. Just in my feet. Now the keel is pitted so it could be that the keel is pitted heavier on one side than the other.
Quote:
Originally Posted by titustiger27 View Post


didn't think this would go on, but it is a forum

Now that we are in the analyze stage... I know some of this you answered in the original post

Does this singing happen in various situations

does it happen on a port tack and starboard
downwind? I know it didn't happen both ways, but before you tacked were you going the same speed on the Starboard Reach

Have you experimented these factors since?

I'm a little surprised that it doesn't happen in both directions --- assuming you are going the same speed?
I've only had the boat out once. Only happened on the port tack not starboard. Various speeds, however a change in speeds did change the sound. Slower or faster sound remained, only on port tack. Next time out hopefully I'll have my lines run back to the cockpit and I'll feel safer about running the jib. I'm a bit shy of it right now as I must have a hand on the tiller to raise or lower any sails. I also think I'm in need of a boom vang. My sail was billowing fairly hard. I may try to rig up some thing if I can't get one at a reasonable price. With that I should be much faster and I can experiment with how different speeds effect the singing.
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post #20 of 23 Old 04-25-2019
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Re: Singing ships????


that's tough

I go out in my little boat most times by myself most times and the tiller is a problem, I end up deciding everything before I leave the dock (am I going to use the jib, should I reef, etc.)

Last year it wasn't as windy as I thought, but someone I passed on the way out --- "You reefing?"

I couldn't tell if they thought I was over cautious or if they were just bragging that they knew what that was

... at times I have been tempted to string a line across the tiller to hold it in one directions, but the fluky


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