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Post by zaphod on May 9, 2019 20:56:16 GMT
One of the drawbacks of the wide transoms on modern cruising boats is when the boat is at rest, and waves slap the underside of the overhanging transom. We have found on our boat this can be quite loud, particularly for someone sleeping in the aft cabin.
My wife was suggesting we try stringing a couple of pieces of foam or pool noodles under the transom at night. I am wondering what tricks other people have tried to dampen the slap?
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Post by moonshadow on May 9, 2019 21:05:33 GMT
There is a commercially made product for that. Kind of a sailcloth bag that is slipped under the transom and fills with water to dampen the slap. I only wish o could remember the name.
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Post by sitara on May 9, 2019 22:04:39 GMT
At home even the slightest noise will wake me, we live in a very quiet area. On the boat I don't notice the waves under the transom any more although it did take a few years to get used to it. Anchoring will reduce this problem with the bow into wind.
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Post by Trevor on May 9, 2019 23:09:25 GMT
Yes, I guess all of our yachts are a compromise. Occasionally that slapping can be a problem but we have simply got used to it.
Trevor
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Post by ohana on May 9, 2019 23:38:16 GMT
Just ordered some pool noodles on amazon, ones with a hole down the length so I can feed some rope through them. Hopefully will do the trick
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Post by zaphod on May 10, 2019 2:57:28 GMT
Just ordered some pool noodles on amazon, ones with a hole down the length so I can feed some rope through them. Hopefully will do the trick That's exactly what my wife was suggesting...you ordered them from Amazon? I guess you dont have dollar stores near you?
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Post by cm8 on May 10, 2019 11:54:27 GMT
Would be great to know how the pool noodles work out. How many you end up using, etc.
Costa
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Post by ohana on May 10, 2019 13:44:09 GMT
Ok, will do. They arrived this morning, so will be trying these over the weekend.
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Post by rob57 on May 13, 2019 21:47:09 GMT
One of the drawbacks of the wide transoms on modern cruising boats is when the boat is at rest, and waves slap the underside of the overhanging transom. We have found on our boat this can be quite loud, particularly for someone sleeping in the aft cabin. My wife was suggesting we try stringing a couple of pieces of foam or pool noodles under the transom at night. I am wondering what tricks other people have tried to dampen the slap? On our J43 ds we lived aboard all of 2017 and had this problem too; the rear section of the hull is kind of like a large tin can (except obv not tin!) and echoes down below whereas up on deck you can't hear anything! We tried some noodles and it helped only a bit. They had a hollow centre so we threaded a spare rope through and tied them under the stern and up to the toe rail either side. Looking for a better solution I then thought about sound proofing for the relatively hollow rear section of the hull and on the J43ds there is a rear life raft storage compartment which, when removed, gives good access to the rear chamber of the boat containing steering quadrant etc. It took a while to fit but I did it and it has helped a bit but still not as much as I would like. Maybe next time we'll see if the new sound proofing PLUS noodles does the trick!
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Post by windward54 on May 14, 2019 3:32:55 GMT
I think you were trying to remember the Slap Silencer. We bought one years ago, and it really made a difference. They stopped making the product for a while, but it looks like it’s back. Or at least the website is up! slapsilencer.com/
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Post by zaphod on May 15, 2019 16:33:10 GMT
I think you were trying to remember the Slap Silencer. We bought one years ago, and it really made a difference. They stopped making the product for a while, but it looks like it’s back. Or at least the website is up! slapsilencer.com/What a horrible website! Looks like a good idea though...I'm thinking it looks like a good DIY project!
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Post by alenka on May 16, 2019 22:46:46 GMT
I was told a sheet of bubble wrap - the nobbly stuff works very well.
Cannot imagine that it would last long.
Personally, I don't really have a problem with the noise, but when we find ourselves beam across a swell that's a different story
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Post by ohana on Jun 14, 2019 12:26:27 GMT
Just ordered some pool noodles on amazon, ones with a hole down the length so I can feed some rope through them. Hopefully will do the trick Ok - report back, the noodles totally useless!!! noodle dia was 90mm, which was far too small. In retrospect reckon would need to be 200mm plus to have any chance of working. However this would become far to bulky to store. so thinking of different approach - length of say rubber strip perhaps 350mm wide, 5mm thick, suspended from the guardrails etc at say 800mm intervals, 100mm immersed in the water. Not unlike the other design mentioned in this thread, but home made version. Just roll up to stow. Work in progress
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Post by cdrmike on Jul 31, 2019 13:53:48 GMT
Water Slap can be minimised by deploying 3 or 4 long fenders closely tied end to end and secured at the ends to the pushpit rails. They should be held close to the stern and do break up most of the waves before they pass under the transom. It works for us!
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Post by npmr on Jul 31, 2019 17:13:27 GMT
Feels to me that the solution should be created in the design and factory.
Our 33i has a huge cavern to amplify the slap. It's water straight onto the hull.
I suggest that for a few pennies and virtually no time at all, the inside of this space could have been sprayed with sound deadening foam, before they put in the steering gear etc and before they put the deck on.
Result? Massively reduced noise and much happier customers.
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Post by ohana on Aug 1, 2019 21:05:37 GMT
Water Slap can be minimised by deploying 3 or 4 long fenders closely tied end to end and secured at the ends to the pushpit rails. They should be held close to the stern and do break up most of the waves before they pass under the transom. It works for us! This occurred to me also but the problem is that the water slap noise generally happens alongside a pontoon when the fenders are otherwise in use!! It is generally not an issue at anchor.
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Post by j24sailor on Aug 23, 2019 6:30:05 GMT
One of the drawbacks of the wide transoms on modern cruising boats is when the boat is at rest, and waves slap the underside of the overhanging transom. We have found on our boat this can be quite loud, particularly for someone sleeping in the aft cabin. My wife was suggesting we try stringing a couple of pieces of foam or pool noodles under the transom at night. I am wondering what tricks other people have tried to dampen the slap? We have had the same problem and tried the noodles which did not work at all. I bought the slap silencer for my wife and it arrived last month but haven't tried it yet. Will keep everyone updated. James
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Post by mikebz on Aug 27, 2019 11:24:46 GMT
I bought the slap silencer for my wife...
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Post by j24sailor on Aug 30, 2019 4:37:26 GMT
I have the most amazing wife. She actually appreciated it as a birthday present. Worked out even better as the company that sells them in North America is called VacuWash and the box had the name on the side. She thought I had bought her something to wash the boat so when it turned out to be something to help her sleep I actually looked really good.
James
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Post by j24sailor on Aug 30, 2019 4:39:03 GMT
I bought the slap silencer for my wife... I have the most amazing wife. She actually appreciated it as a birthday present. Worked out even better as the company that sells them in North America is called VacuWash and the box had the name on the side. She thought I had bought her something to wash the boat so when it turned out to be something to help her sleep I actually looked really good. James Read more: jeanneau.proboards.com/thread/7340/transom-slap?page=1#ixzz5y3XXTaMr
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Post by andreshs1 on Sept 3, 2019 12:04:01 GMT
I have the most amazing wife. She actually appreciated it as a birthday present. Worked out even better as the company that sells them in North America is called VacuWash and the box had the name on the side. She thought I had bought her something to wash the boat so when it turned out to be something to help her sleep I actually looked really good. James Read more: jeanneau.proboards.com/thread/7340/transom-slap?page=1#ixzz5y3XXTaMrI should give it a go and see if my wife is so understanding.... 😂😂😂😂😂
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Post by NZL50505 on Sept 3, 2019 16:33:32 GMT
Great idea. Might buy my wife a new mainsail or maybe radar for her birthday (which happens to be day before mine).
Perfect plan - what could possibly go wrong?
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Post by mikebz on Sept 4, 2019 15:09:12 GMT
I bought my wife a new lawn mower for Xmas once. I made it clear fairly quickly that it was a 'joke' present and she saw the funny side of it. At least, she did until I posted a picture of it on FaceBook saying how lucky she was, and then she didn't. Still, can't have been that bad as it doesn't get brought up regularly at my quarterly review.
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Post by so40gtb on Sept 13, 2019 1:47:02 GMT
We tried a few things - the most effective one was to pull the dinghy up tight against the stern, with the line from its towing bridle brought through the cockpit to a cabintop winch. The dinghy took up much of the wave slap, but didn't bounce against the stern because it was winched in tightly. This doesn't work very well in marinas, where one must keep the fairway clear and the dinghy must be aboard or otherwise in no boat's way.
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Post by j24sailor on Nov 26, 2019 4:28:10 GMT
I have the most amazing wife. She actually appreciated it as a birthday present. Worked out even better as the company that sells them in North America is called VacuWash and the box had the name on the side. She thought I had bought her something to wash the boat so when it turned out to be something to help her sleep I actually looked really good. James Finally tried it tonight in November and while it wasn't perfect especially because our boat has a wide flat transom on the water, it definitely improved the sound. Will take some adjustments it is something to consider. James
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