1986 19' Atlantic rebuild

Questions about boat repairs with our resins and fiberglass: hull patches, transoms and stringers, foam, rot etc.
TomW1
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Re: 1986 19' Atlantic rebuild

Post by TomW1 »

goingbogueoutdoors wrote: Fri Feb 17, 2023 11:15 am Rubber finally came in for my tank area. Got tank set and foamed on both sides, as well as all the bilge area squared away. The sea chest was a bit awkward but finally was able to commit to a layout that was functional. Tank sending unit and all three rule pumps with be run together on the portside, around the transom to the rigging tube. Fuel on the starboard side, then shoots upward to the rigging tube.

Still need to pull a little bit of slack on the fill/vent tube to eliminate the low spots. Also still running bilge pump to the starboard side817495A6-4306-426B-B254-16C3F4244FB2.jpeg89B3A0A4-6BCB-4590-AF82-1E037EC719D9.jpegD49325CB-6A90-48B5-8CC2-B179A84CFB1C.jpeg
How deep does the foam go? The ABYC/USCG rules does not permit foam down the full sides. If you are just foaming a couple inches down from the top that is fine, but you have to leave room for the sides to expand. The approved method is to foam the corners so that both the sides and ends can expand. The sides, ends, and top must be able to expand by 3%. The second method is to use tie down straps and finally David Pascoe's method of attaching neoprene strips with epoxy to the hull and tank with epoxy.

Tom
Restored Mirror Dinghy, Bought OD18 built by CL, Westlawn School of Yacht Design courses. LT US Navy 1970-1978

goingbogueoutdoors
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Re: 1986 19' Atlantic rebuild

Post by goingbogueoutdoors »

Lot of interest in the tank. The bottom and both ends have a rubber membrane that is 1/4” and plush like neoprene on the bottom and thinner on the sides. Foam doesn’t completely cover the tank to the bottom, has a piece of nidacore covered in rubber on port/starboard side to also act as a brace. Tank was pressure tested when I replaced my sending unit and tube, have not pressure tested the system in place with hoses attached

goingbogueoutdoors
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Re: 1986 19' Atlantic rebuild

Post by goingbogueoutdoors »

Got resourceful and cut a 4” piece of PVC in half in order to create chase tubes for the fuel vent/fill, as well as my bilge pump. Tacked into place then fillet and bonded today. Pressure test was good on the tank overnight
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fallguy1000
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Re: 1986 19' Atlantic rebuild

Post by fallguy1000 »

Pvc won't hold in epoxy..

I tried.

Richard, aka Aripeka Angler was kind enough to recommend Black Mamba FHG and I used it and got the pipes to hold now.
My boat build is here -------->

viewtopic.php?f=12&t=62495

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cape man
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Re: 1986 19' Atlantic rebuild

Post by cape man »

I made chase tubes the same way to cover the wires for the under gunwale deck lights and the antenna chord on my OD18. The trick to get pvc to hold epoxy is to rough it up with 40 grit. I also did the same for the scuppers, drains for hatches, drain to bilge, and chase tubes from console to the rear, including where they went through the stringers and bulkheads below deck. Can't see the latter, but all that are exposed show no sign of failure 12 years later and I've used her hard.
The world always seems brighter when you've just made something that wasn't there before - Neil Gaiman

goingbogueoutdoors
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Re: 1986 19' Atlantic rebuild

Post by goingbogueoutdoors »

cape man wrote: Mon Feb 20, 2023 6:53 am I made chase tubes the same way to cover the wires for the under gunwale deck lights and the antenna chord on my OD18. The trick to get pvc to hold epoxy is to rough it up with 40 grit. I also did the same for the scuppers, drains for hatches, drain to bilge, and chase tubes from console to the rear, including where they went through the stringers and bulkheads below deck. Can't see the latter, but all that are exposed show no sign of failure 12 years later and I've used her hard.
This is what I did. 36 grit actually, after roughing the tubes up I cut them in half and I believe they bonded well. Will wait and see but my scuppers are also threaded 3” PVC and my rigging tube also bonded with epoxy. Another workboat with “half moon” 3” pvc going down the entire gunnel:
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goingbogueoutdoors
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Re: 1986 19' Atlantic rebuild

Post by goingbogueoutdoors »

Cutting deck, hope to have whole thing cut and bottom side of it glassed by the weekend
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goingbogueoutdoors
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Re: 1986 19' Atlantic rebuild

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Rest of the deck cut and dry fit today, will glue and glass bottom of panels tomorrow
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TomW1
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Re: 1986 19' Atlantic rebuild

Post by TomW1 »

When you have the deck out sand the PVC pipe so that the tape will hold better to the pipe. This has been discussed before on here. That slippery pipe does not form a good seal to the fiberglass unless something is done to rough it up.

Tom
Restored Mirror Dinghy, Bought OD18 built by CL, Westlawn School of Yacht Design courses. LT US Navy 1970-1978

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Re: 1986 19' Atlantic rebuild

Post by piperdown »

TomW1 wrote: Wed Feb 22, 2023 5:58 pm When you have the deck out sand the PVC pipe so that the tape will hold better to the pipe. This has been discussed before on here. That slippery pipe does not form a good seal to the fiberglass unless something is done to rough it up.

Tom

He said he sanded with 36 grit sandpaper to rough the pvc tube.
Eric (aka, piperdown)

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