keel hull joint image

[minaret]

The real design impetus for the bolt on iron keel with no stub is a narrower keel profile, resulting in better performance. This slight bump in performance comes at too high a cost for my taste.

[minaret]

Originally Posted by daletournier

You wouldn't take an Amel Super maramu off shore? It has a iron bolt on keel. The Amel is just one of many.

What percentage of modern yachts have their keels fall off? I would suggest the number is extremely tiny relative to the tens of thousands of boats that have been built with bolt on keels.

I would happily take an Amel offshore. But I wouldn't own one, in fear of the possible yard bills. Even though I could do the work myself. For the record, I have repaired many Amel. Certainly not concerned about the keel breaking off and sinking the boat, don't think that happens much at average boat speeds. Doesn't mean it won't cost a lot more to fix if you hit something.

[minaret]

Originally Posted by boatpoker

Moisture metering over multiple layers of anti-fouling paint in very poor condition will mostly likely be very inaccurate.

Sorry, I tried to be politic but the truth is the meter readings will be absolute BS.

You would think most of what came out of the mouth of anyone who would meter over anti fouling would be BS!

[a64pilot]

Originally Posted by Pauls

Keels are virtually never bolted onto steel hulls. Why would you? Steel hulls are built with steel keels welded to the bottom. The hollow keels are filled with ballast.

It’s my understanding that while probably not being very common at least a Dutch builder or two has built steel hulls with bolt on keels.
I believe to make to Boat easier to ship by truck over roads.

[Don C L]

Still curious... what is this boat?? Did I miss it somewhere?

[sandrunner]

Originally Posted by Don C L

Still curious... what is this boat?? Did I miss it somewhere?

It is a beneteau 430.

Based on the survey, the amount of work required resulted in a no deal with me. Someone else bought it shortly after without a survey...

Originally Posted by minaret

Not true. Take a given boat design and build two finished boats, one with a lead ballast keel and one with iron. Assume both have a keel stub even (this may not be possible in the case of the iron keel). Assume both finished keels are exactly the same shape. The iron ballast keel will obviously be much larger, with a smaller stub. The two boats will appear identical in every way, except for the location of the keel/stub seam. However, the lead keeled boat will have a slightly lower center of gravity, and therefore, given the same rig, will be slightly stiffer. This is boat building 101, and the reason human beings moved from internal ballast to bolt on. Or at least, one of them. The denser the ballast medium, the stiffer the boat.

[RoseRuth]

I'm not sure if someone else has come up with a better repair but I came across this and apparently that rubber seal is very important & can be quite fragile.

Below is an exerpt from a public forum article with link at the bottom

...Then we found out that the hull-deck joint needed some attention – a common thing, we learned, and a job that a friend told us required some care in the doing:

. . . He warned us it was very difficult to get the rubber rubbing strip that was over the joint back on if you made the mistake of taking it all off at once (I suspect he might have had some experience with this). Grateful for his warning, Richard devised a plan:

he softened sections of the strip with
a heat gun, pulled them away from
the hull, used 2×2 lumber to hold
them out while he drilled out the
rivets that held hull and deck together,
replaced them with bolts and sealed
the whole joint with silicone. Only then
would he put that part of the rubbing
strip back. That job got done, bit by
bit, the first winter we had the boat. . .

Here's the link to the article:

https://sailingintotheblue.wordpress.com/2020/11/08/more-space-the-tanzer-7-5/amp

[Jim Cate]

Originally Posted by RoseRuth

I'm not sure if someone else has come up with a better repair but I came across this and apparently that rubber seal is very important & can be quite fragile.

Below is an exerpt from a public forum article with link at the bottom

...Then we found out that the hull-deck joint needed some attention – a common thing, we learned, and a job that a friend told us required some care in the doing:

. . . He warned us it was very difficult to get the rubber rubbing strip that was over the joint back on if you made the mistake of taking it all off at once (I suspect he might have had some experience with this). Grateful for his warning, Richard devised a plan:

he softened sections of the strip with
a heat gun, pulled them away from
the hull, used 2×2 lumber to hold
them out while he drilled out the
rivets that held hull and deck together,
replaced them with bolts and sealed
the whole joint with silicone. Only then
would he put that part of the rubbing
strip back. That job got done, bit by
bit, the first winter we had the boat. . .

Here's the link to the article:

https://sailingintotheblue.wordpress...tanzer-7-5/amp

Well, first of all, welcome to CF RR. Hope you enjoy your time on board.

But with reference to your post, you seem to be confusing the hull to deck joint with incorporated rubbing strake (your reference) with the OP's worry about the hull to keel joint... a very different situation!

The OP eventually decided (wisely) to pass up buying the subject boat and moved onward... several years ago.

But thanks for posting, and do continue to add your voice to discussions.

Jim

[GordMay]

Greetings and welcome aboard the CF, RoseRuth.

[coopec43]

It's always good to see new members posting.

Many people resurrect old threads (this one started 24-11-2017) but I'm not at all convinced it is the right thing to do. Maybe I am wrong? Am I missing a point?

[Jim Cate]

Originally Posted by coopec43

It's always good to see new members posting.

Many people resurrect old threads (this one started 24-11-2017) but I'm not at all convinced it is the right thing to do. Maybe I am wrong? Am I missing a point?

What is your objection?

Jim

[Manateeman]

In a post in this thread, the vessel is described as a “cripple”. If one googles the meaning it refers to a person who has difficulty or cannot walk due to an injury or illness. It’s an old word which should hopefully fade away.
It is a word which is particularly hurtful to the disabled.
And one of the manatee crew is fully disabled.
And I should hope this word will never, ever be seen again.
Captain Mark

[coopec43]

Originally Posted by Jim Cate

What is your objection?

Jim

I'd rather see a new thread started than an old thread resurrected because:

• Many of the people who contributed to the old thread have moved on.
• Over the years new products come on to the market (paints, adhesives, resins, electronics, anchors, compost toilets etc) making comments of the original thread no longer appropriate.
• Laws/rules change e.g. banning of certain types of anti-fouling, banning of oil based paint, discharge of toilet waste laws.
• New/updated yacht designs coming onto the market.

What is the advantage of resurrecting an old thread? I can't see any.

[coopec43]

Originally Posted by Manateeman

In a post in this thread, the vessel is described as a “cripple”. If one googles the meaning it refers to a person who has difficulty or cannot walk due to an injury or illness. It’s an old word which should hopefully fade away.
It is a word which is particularly hurtful to the disabled.
And one of the manatee crew is fully disabled.
And I should hope this word will never, ever be seen again.
Captain Mark

Yes and we should never say a person is deaf (the person is "hearing impaired"). Similarly a person is not blind but "visually impaired". Likewise we should not call a person an idiot but "intellectually impaired" (remember that when one of your crew stuffs up next)

[coopec43]

Deleted