I've finally got the new aluminum bulkheads tabbed in place. My question; there is a ga between the top of the bulkhead and the coach roof...about 3/8". I've tabbed in the sides of the bulkhead that come in contact with the hull as that is how the original bulkheads were tabbed. I was also going to tab them on the top as well, but not sure how much deflection I should expect with a 33' mast, and the force of eight shrouds pulling the mast into the coach roof...its deck stepped. Thanks for any and all help. I would not have been able to get this far without the help of this forum. Cheers!
- Status
- Not open for further replies.
D
Dwayne Hillier
Compression Post
I can't speak directly about the Northern 25, but most 25' sailboats, especially of older vintage, have a compression post. I saw in your pictures that yours does not, but wasn't sure if it had been removed, or if that's by design. Do you know?
I can't speak directly about the Northern 25, but most 25' sailboats, especially of older vintage, have a compression post. I saw in your pictures that yours does not, but wasn't sure if it had been removed, or if that's by design. Do you know?
D
Dwayne Hillier
Compression posts?
Sorry, but what is a compression post? I did remove to posts that where either side of the bulkheads, which I plan to reinstall in the next few days. Is what your saying that the posts take most of the weight, or rather transfer the load to the keel, and not neccessarily the bulkheads? I'm not quite sure if we are talking of the same thing?
Sorry, but what is a compression post? I did remove to posts that where either side of the bulkheads, which I plan to reinstall in the next few days. Is what your saying that the posts take most of the weight, or rather transfer the load to the keel, and not neccessarily the bulkheads? I'm not quite sure if we are talking of the same thing?
D
Dwayne Hillier
I think I know what you are talking about
Do you mean the post that the 2006 Hunter 25 has in the center of the cabin? No, mine didn't have one of those...if thats what you are refering to...?
Do you mean the post that the 2006 Hunter 25 has in the center of the cabin? No, mine didn't have one of those...if thats what you are refering to...?
More on Compression Posts
Yes, a compression post transfers the pressure of the mast to the keel. You may not have recognized it for what it is. When I first got my O'Day, I thought about how I would remodel if I ever decided to do it. One of the things that "bugged me" was that the companion way to the forward part of the boat was off center. Later, as I gained more experience with the boat, I found that the reason is that the compression post runs down the center of the cockpit under the mast. If you have "before" pictures of your cabin, post them and we can tell you if you're supposed to have a compression post. If you are, and I suspect you are, that will be what holds the pressure of the mast, not the cabin top.
Yes, a compression post transfers the pressure of the mast to the keel. You may not have recognized it for what it is. When I first got my O'Day, I thought about how I would remodel if I ever decided to do it. One of the things that "bugged me" was that the companion way to the forward part of the boat was off center. Later, as I gained more experience with the boat, I found that the reason is that the compression post runs down the center of the cockpit under the mast. If you have "before" pictures of your cabin, post them and we can tell you if you're supposed to have a compression post. If you are, and I suspect you are, that will be what holds the pressure of the mast, not the cabin top.
D
Dwayne Hillier
Bulkheads
...Okay, but I thought thats what the bulkheads were for; to take the stress of the mast? As I said...rrr...typed, I do have 2 boards that go on the edge of the bulkheads that have a spot on the cabin floor for them to sit on. Perhaps those are what is transfering the weight. These two boards are not very wide, but they are both a very snug fit.
...Okay, but I thought thats what the bulkheads were for; to take the stress of the mast? As I said...rrr...typed, I do have 2 boards that go on the edge of the bulkheads that have a spot on the cabin floor for them to sit on. Perhaps those are what is transfering the weight. These two boards are not very wide, but they are both a very snug fit.
D
Dwayne Hillier
the pic
Hiya, in that pic you have there...if you look at the clock on the bulkhead, just to the right of that you will see what looks like framing on the extreme edge of that bulkhead...that is the post I am talking about, its actually quite solid and goes from the roof to the floor, where there are little molded fiberglass tabs for them to sit on. I always thought that was just for show, that the bulkheads did all the work of transfering the mast pressure to the keel.
Hiya, in that pic you have there...if you look at the clock on the bulkhead, just to the right of that you will see what looks like framing on the extreme edge of that bulkhead...that is the post I am talking about, its actually quite solid and goes from the roof to the floor, where there are little molded fiberglass tabs for them to sit on. I always thought that was just for show, that the bulkheads did all the work of transfering the mast pressure to the keel.
D
Dwayne Hillier
Herb
Herb, you may find it interesting to note, that the Northern 25 is actually built from the molds of the O'Day Outlaw. The Northern mould was made one foot shorter, and one foot wider, other then that its the same boat...pretty much.
Herb, you may find it interesting to note, that the Northern 25 is actually built from the molds of the O'Day Outlaw. The Northern mould was made one foot shorter, and one foot wider, other then that its the same boat...pretty much.
Posts
"I always thought that was just for show, that the bulkheads did all the work of transfering the mast pressure to the keel" That's what I thought too, but found differently. Like I said, I can't be sure on yours, but it looks to me like the two posts have a header span between them. I would think that the pressure of the mast is on that header. I'm fairly certain those posts, and that beam between them, is your compression system. And yes, I had found the link between O'Day and Northern. It's interesting, the number of "cousins" there are in the boating industry.
"I always thought that was just for show, that the bulkheads did all the work of transfering the mast pressure to the keel" That's what I thought too, but found differently. Like I said, I can't be sure on yours, but it looks to me like the two posts have a header span between them. I would think that the pressure of the mast is on that header. I'm fairly certain those posts, and that beam between them, is your compression system. And yes, I had found the link between O'Day and Northern. It's interesting, the number of "cousins" there are in the boating industry.
- Status
- Not open for further replies.