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CP 19 compression post attachment

Started by tsaiapex, December 13, 2006, 04:39:09 PM

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Craig Weis

A note on floatation, in one of my posts from way back, and in talking to Rich Hutchins about flotation in a Com-Pac19 he said..."Forget it.  Fill that boat up and she goes down. You can foam the inside till a minnow is out of space and that cement keel will still pull her under."
It's the nature of this boat.  skip.

pelican

Quote from: skip on December 19, 2006, 09:31:10 PM
A note on floatation, in one of my posts from way back, and in talking to Rich Hutchins about flotation in a Com-Pac19 he said..."Forget it.  Fill that boat up and she goes down. You can foam the inside till a minnow is out of space and that cement keel will still pull her under."
It's the nature of this boat.  skip.

Speaking in general about boats and not specifically compacs.
When people see foam in a boat, most would assume the purpose is flotation. In fact, foam can be a structural componit of the boat and it is often used to stiffen the hull or add support to decks etc:.

Boat owners can remove foam and make other structural changes to boats in general and sail the boat for years without a problem.

Sailors who consistently push their boats to the limits would be the first to know if they made bad changes.

Happy Holidays to all

Craig Weis

#17
On my C-P 19 I just cleaned up [read removed] a little overspray foam, enough to drill two 2 inch holes 5 inches in front of the keel. The holes were equally spaced either side of the centerline.

The storage for the gear is on top of the relative thin layer of foam.

The foam is there to muffle the pounding hull vibes as sailors beat into the wind. Ohhh wait. I mean true sailors never beat into the wind. So I read once in a sailing artical Ha. LOL skip.

pelican

I read that true sailors never check the depth of water with both feet.

True sailors will never be sick or allow any liquid to be tossed over the windward side of the boat.

I can also tell you that the prevailing winds down here in Florida are always coming from the direction that I am going.... or so it seems.


Craig Weis

Oh I often wondered why I always am sailing into the wind...both ways!

steve brown

This article got me to go out and check Odina's compression post. Sure enough, her post is bolted to vee berth bulkhead and stops about 6 inches above the floor of the plywood box as seen through the access hole. The bolt heads and washers were digging into the bulkhead. I removed one bolt and it was deformed a bit making it difficult to remove. I had two SS 7/16" bolts on hand that matched the originals so I installed each of them with a fender washer against the bulkhead. The bolts did not go in square to the bulkhead due to deflection of the post since 1982 and it was quite an ordeal to install them. I did not try to change the post height for fear of causing damage. The bolts are as tight as I can get them but they are not seated flush to the washers. Everything seems solid however.  Should I do anything else? Thank you, Steve

Craig Weis

Yea, leave the compression post bolts alone as it appears to be the same construction and configuration as on my Com-Pac 19. Mine are bent slightly too. No big deal. Skip.

JohnS

The compression post on my 1991 CP-19 shows the same condition as described by others. The load on the compression post imposed by the rig is quite high - about 1500 lbs I guesstimate, based on the fact that the stays and shrouds would be tensioned to around 15% of their 3500 lbs breaking strain and considering the angles of the stays relative to the mast.
I'll just refit the bolts and hope to get another 15 years life out of the arrangement.

JLaman

Hello all -- my first post to the site other than the registry.  I am a new CP19 owner as of Dec, but snow in PA limits me to thinking over details, making an endless to-do list, and tuning up the motor in my basement.  One item on my list has been to investigate the angled bolts in the plywood vee berth bulkhead that seemed to support the compression post.  I found all of your responses and knowledge very helpful.  Add one more CP19 to the list of angled, slightly bent compression post bolts.  Somehow it doesn't seem that this could have been intentional, but I find comfort in knowing that everyone else has the same situation.  Agreed on the need for structural flexibility due to thermal movements.  When it warms up enough to crawl under the tarp, I will investigate further and report back.
JLaman

K3v1n

Well with all this talk of the compression post I had to take a look at mine, not touching hull.
Looks good from underneath but as you can see in the picture of the bolt heads, things have settled a bit.




-Kevin
1981 Com-Pac 16 MK I
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Craig Weis

#25
Yea Kev, my C-P 19 compression post bolts look about the same as the ones on Gypsy Soul with about the same 'dig' in to the wood as yours, but I never had that much foam that close to the vertical plywood former, my foam was nearly 4 to 5 inches toward the bow, nor was my post flattened out. My two bolts just are drilled through the square post without a landing for the washers and nuts to sit on. skip.