CD33 oilcanning question

[Vincent]

My CD 33 has been on the hard for a year now. I have beed modifying the interior, and have family issues. The boat needs to hit the water, I hope this spring. If has beed in a 4 post steel cradle and I just noticed last week that the two forward posts are bowing in the hull a bit. I called the yard and they are goung to reposition the boat, add larger pads and place a jackstand under the leading edge of the hull. The yard is a good one, (in my limited experience). They are he;pful, they allow, even encourage, owners to work on their boats, and spend lots of time answering questions. The head guy did not seem to be too concerned about this oil canning, but I am wondering ifI should be concerned about this. Is there a core in the hull that may have beed delammed of crushed? Or do I float her in the spring and see if it pops back out. The indentation is noticable if you look for it, but it is probably not more than a 1/4 -1/2 inch indented.
Thanks for any comments

[Frenchy]

Hi Vincent - I haven't any experience with "oilcanning" but every instance I've read about has corrected itself
once the pressure has released. There's no core. Here in the northeast, most block up the keel
and use removable stands. The weight of the hull bears mostly on the forwardmost keel block and a little on
the v-topped stand by the forefoot. The padded stands, chained athwartships, provide stability but carry very little
weight, if any. I'm guessing you'll be fine. Good luck- Jean

[Jim Walsh]

Proper support and placement are key to keeping your hull safe and sound when on the hard. The picture below was taken a couple weeks ago in the middle of a project but illustrates a proper method.
Two supports in the bow and three along both sides. The full weight of the hull is taken by the wood blocking placed under the keel.
The yard crew have placed the stands in this fashion yearly since Orion arrived in 2007. Owners are not allowed to touch the stands once the crew have placed them. If an owner feels the need to move a stand for maintenance or painting the yard crew will oblige.
This is not the only acceptable method but is very well done in my opinion.

[Sea Hunt Video]

I was told by some grizzled worker at a boatyard that jack stand supports are not supposed to support much if any weight. They are there just to keep the mast pointed straight UP.

The blocks (or whatever is used) on which the keel sits is what takes most of the weight of the hull, etc.

I have my Cape Dory on a Triad trailer with four (4) jacks stands. The keel sits in a special groove and carries the weight. The 2 pads on each side (4 total) just keep hull from tilting over. I check them periodically, loosen them a little, snug them up to the hull a little, etc. I have not observed any indentations so far - about 1 year. If the medical geniuses don't get things squared away ricky ticky it may be another year.

[Vincent]

As an update: the yard repositioned the boat today, and added three jackstands at the forward end of the boat. It looks more secure. I am happy to hhear there is no core to worry about. Thanks for the replies.

[John Stone]

I don’t think CD made any cored hulls. Certainly not the 33 or 36. Glad to hear you are feeling better about it. Our boats can cause us such worry. It’s amazing we have not all gone insane. Mmmm...maybe we have.....

[Paul D.]

I think you should be fine, just keep an eye on the area closely over the next few months. Not much correction may happen in cold weather.

We had a Typhoon that I rescued from a farm field. It was stored incorrectly for years and had about a good one inch indentation in the starboard aft quarter at the post. I actually used a basement jack on the inside, applied firm, steady pressure and heat from the outside and it came right over a few days or so. I think worst case you may need to do something like that but you'd have to remove the ash ceiling strips and maybe the bunk in the forward cabin.

The CD45 had a cored hull I heard but they only made three of them. The 33 and other CD sailboats to my knowledge were all hand laid solid core fiberglass, generously applied, and they didn't spare the gelcoat! I would not worry about this structurally, especially if no spider cracks are present in the area.

Good luck getting her in the water. She'll be much happier there and you'll find oh so many other problem melt away!