1986 19' Atlantic rebuild

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

Post by goingbogueoutdoors »

I struggled today with wetting out my 2 additional layers of tabbing. I had someone suggest to me to use peel ply in some stages of the built to help with wetting out, especially the 1708 cloth
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Fuzz
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Re: 1986 19' Atlantic rebuild

Post by Fuzz »

1708 can be a pain to wet out and is worse when using epoxy. Some times it works better to wet it out on plastic so you can flip it over and then move it to where you want it. If I am using epoxy I prefer to use 12 or 17 oz biax with no mat.

fallguy1000
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Re: 1986 19' Atlantic rebuild

Post by fallguy1000 »

Peelply is not helpful for wetting out.

Peelply eliminates the need for as much sanding and also helps eliminate blush. Never apply peelply late towards gel time as it will result in pulling on the laminate and actually pull the part away from the substrate.

The best way to wetout 1708 is on a table on plastic. Always in all cases, the bottom or substrate must be wetted first. Why? 1708 has 3 layers off glass, the mat layer which is disorganized and every direction, the biax layer going one way and the biax layer going the other way. It should never be wetted down through because the likelihood of a dry layup is possible. 1708 is laid out at a rate of 25 ounces of epoxy per yard, plus any roller losses. It is thirsty stuff.

Using sharpies and making lots of layout marks helps get the pieces back where they belong when wet.

I move every table wetted piece to cardboard to carry to the boat.

Another thing I like about peelply is you can use it to keep tape from sticking to the new work. For example, let's say you tape an outside radius, but the glass tape doesn't want to stay down. Apply peelply and then run masking tape over the peelply and to dry area to hold it. When things cure, the masking tape won't be bonded to the finished piece and will pull with the peelply. This may be y I mentioned it..
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fallguy1000
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Re: 1986 19' Atlantic rebuild

Post by fallguy1000 »

If you did not table wet the pieces, or you got the peelply on late; that would explain the troubles.

Just grind out any large bubbles and patch the spots. The work ain't perfect, but doesn't look like a do over to me.
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fallguy1000
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Re: 1986 19' Atlantic rebuild

Post by fallguy1000 »

My method of table wetting....

I put about 40% of the need for the first piece on the plastic. I always put the longest pieces on the wetting area first to reduce resin waste. Then I lay the piece on and quickly roll it and continue same fashion, stacking smaller pieces on top. Then I might flip it all over or take the stack down one at a time and move them to cardboard while I do the QA and make sure they are well wetted.
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viewtopic.php?f=12&t=62495

fallguy1000
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Re: 1986 19' Atlantic rebuild

Post by fallguy1000 »

You can also just inject epoxy with blunt nose needles into any air voids. Use a 1/16" needle. I forget the gauge. Drill two holes in each area where there is an air pocket.. mark with masking tape and then inject and use masking tape to cover the injection and vent holes
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viewtopic.php?f=12&t=62495

goingbogueoutdoors
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Re: 1986 19' Atlantic rebuild

Post by goingbogueoutdoors »

Update: Well I still have the boat and I have it off the trailer on cribbing finally.

Long story short: Had an emergency transom replacement on one of our Twin Vee work boats. I will make a separate post outlining how we did all that but it did give me the much needed skill set and confidence to take on this project full speed ahead!

goingbogueoutdoors
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Re: 1986 19' Atlantic rebuild

Post by goingbogueoutdoors »

Dry fitted two layers of 1708 for my transom today. Still going to sand and form a better radius on the backside of the transom, but wanted to go ahead and get these pieces cut. Haven’t trimmed the shorter of my two layers yet either. Also planning to do a layer of 1708 down each side of the well as reinforcement.
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fallguy1000
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Re: 1986 19' Atlantic rebuild

Post by fallguy1000 »

General good building practice is to never lay two pieces of same size atop each other. It creates hard points that can result in stress concentration.

Not sure you did, but looks like two of same size, unless I misunderstand..
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viewtopic.php?f=12&t=62495

goingbogueoutdoors
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Re: 1986 19' Atlantic rebuild

Post by goingbogueoutdoors »

fallguy1000 wrote: Wed Nov 23, 2022 8:40 am General good building practice is to never lay two pieces of same size atop each other. It creates hard points that can result in stress concentration.

Not sure you did, but looks like two of same size, unless I misunderstand..
Not a worry! That line about “haven’t trimmed the shorter layer yet” was a testament to doing just that :D

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