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Old 26-05-2009, 15:01   #1
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Transom Water Slap

Hi,

Does anyone knows how to eliminate the water slapping on the transom?
we have an aft cabin and the new marina location has the tide runing against the wind, creating little waves that slap at the stern, where it curves up a bit.

I once saw a "blanket" that you tie under the stern to eliminate the noise.

Any ideas?

Thanks
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Old 26-05-2009, 15:04   #2
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yea, certain locations and hulls can be bad together. Not possible to turn the boat around? Tie some fenders together end to end and string behind the boat to tame the chop a little....?
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Old 26-05-2009, 15:50   #3
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Hi,

Thanks for your reply.
Can't turn the boat since I use KVH sat for my TV and if I turn I have a bulding blocking the signal.

I will try the fenders tonight.
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Old 26-05-2009, 16:13   #4
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The thing you remember is the "Slap Silencer". A friend had one and said it worked pretty well (still some noise but muffled instead of a ringing oil drum)

SlapSilencer eliminates excessive wave slapping noise in aft cabin sailboats | From Anson Sailmakers NH

I've also seen people string together foam pool noodles. Much cheaper but not sure if it works.

Another good reason to not have TV on a boat

Carl
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Old 26-05-2009, 17:44   #5
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noise

Get some soft molded ear plugs. I find they work for all sorts of noises & you will get a good nights sleep.

regards Bill
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Old 26-05-2009, 17:54   #6
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I knew there was an advantage to the old IOR narrow stern design!
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Old 26-05-2009, 18:09   #7
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If you have Davetts on the back, hang a tarp with sinkers at each corner to keep it vertical and let it dip into the water about 6 inches or so. It'll stop the offending waves from slapping and the sinkers will tend to counteract the wave action a bit. Might need heavier weights depending on the wave action. Keep it away from the hull at least a foot or so.
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Old 26-05-2009, 18:23   #8
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I have used "pool noodles" with some success in modest seas (i.e. better anchorages). Ideally, I would like a similar tube with around twice the diameter, so that the tube is less prone to sliding under the boat. In short, they help - but are not a full solution for exposed situations.

That "SlapSilencer" looks like it could shred soft ablative antifoulings. Has anyone used one? How well did it work?

I have used ear plugs on nights when slap was a particular problem, but prefer to hear what's going on. Nonetheless, they take up minimal space, and also permit sleep if well oiled crews snore & snort like hippopotamii.
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Old 26-05-2009, 18:27   #9
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Quote:
Originally Posted by Portobello View Post
I knew there was an advantage to the old IOR narrow stern design!
I suppose there had to be a least one!
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Old 26-05-2009, 23:11   #10
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Immersed transom works too... we never heard a slap ever.

cheers,
Nick.
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Old 27-05-2009, 00:03   #11
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Thanks to everyone for the input.
I am trying the "noodle" tonight but so far it doesn't look good.

I do have davits and will try the tarp on the weekend.
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Old 27-05-2009, 02:56   #12
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I remember seeing a product advertised that would eliminate the noise; but the price tag was outrageous. I now keep a large supply of earplugs.
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Old 27-05-2009, 22:22   #13
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The noise puts me to sleep
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Old 27-05-2009, 23:33   #14
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Park the inflatable off the stern.
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Old 28-05-2009, 16:01   #15
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And above everything, choose your anchorages carefully.
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