68 Chrysler hull ? Deck questions

[timewarp]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

still gonna press forward

 

[rickryder]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

That metal = trouble..... Keep at it! and keep us updated with the pics

 

[timewarp]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Thanks Rickryder ,
I was hoping to find some pictures of a trihull on trailer with a cradle . After using the search for 2 hours i didn't . , However i reread drewpster post and seen he had the stringers and transom removed and still flipped the boat to make cradles and then put the boat on them .
Iam torn still on just the one stringer in mine , just seems mine is missing something for the extra support .

 

[rickryder]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Put in some cross braces every 4 feet for added support like oops said.

If you use pour in expandable foam that will give you floatation and extera support for your floor to sit on.

If they used 3/8" ply from the factory and you feel 1/2'' will be a bit more support I would do it.

At this point your going to rebuild it better than when it was new

 

[jonesg]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Thanks Rickryder ,
I was hoping to find some pictures of a trihull on trailer with a cradle . After using the search for 2 hours i didn't . , However i reread drewpster post and seen he had the stringers and transom removed and still flipped the boat to make cradles and then put the boat on them .
Iam torn still on just the one stringer in mine , just seems mine is missing something for the extra support .

I converted my trailer to bunks then did the resto, I think it cost $150 all total, yours is smaller so will be less.
If you don't need to pop the cap you don't need worry about hull flex, the cap will hold it.
Tri-hull shapes have built in rigidity, like corrugated steel. Theres no need to add ribs or bulkheads where there were none before.
I would yank that stringer out, grind down ,clean the glass channel , pre-glass the new stringer , shoot a cartridge of PL in the groove and plonk it in the old channel ( I'm not a fan of grinding down to nothing so I left a 2 inch high channel).
After the PL cures tab the stringer to the old glass .

The only question on the cap removal is whether you can get at the transom, I cut my splashwell off and glassed it back at the end.
Old chrysler glasswork is quite heavy duty, you aren't going to suddenly fall through the hull just because you removed a stringer.

 

[Woodonglass]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

I been lookin and readin and abstainin but jonesq ^^^^^ makes total sense. Unless you WANT to do a 100% total resore then his advice is SPOT on.

You CAN cut the cap at the back to do the transom,



You CAN cut the channel and tab and cover your stringer. ALL of this is Totally acceptable and you WILL have a TOTALLY STRONG and reliable vessel that will last LONGER than you will own the boat. AND you can sell the boat to the next owner with total confidence that you are selling something that is as good or better than it was from the factory.

 

[timewarp]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Just when i begin thinking , can i really do this , someone chimes in . I really do thank you for that .
I fiqured i need to get somewhat of a plan together.
Had a friend come over and since i still had access to get under the boat , i used posterboards taped together and follwed the line from the underside that the stringer sits in . ( just in case the stringer breaks apart , i can fall back to this and also opps post on scribe method )
My trailer has bunks but not real long so we made some temps one just to be safe . I checked the stringer height at 1 foot intervals , but also noticed the stringer in most places is not even to where the deck would sit . The back of stringer is about 1/2 inch low and up to the front is about 7/16 th inch to high. Is this something to worry about now or just make the stringer slightly taller and trim it down later ?

We removed a section of the stringer to see what i would be dealing with . Sure enough the stringer was sitting of foam . I don't think this part will be to bad to clean up , but man look at the sanding i got ahead of me to be able to glass the new stringer in . I will need to fill this area full of Pl so its even with the hull correct ? Few pics below .

The basic plan is below
#1) remove the stringer then replace the stringer and finish this part before anything else . The stringer does not goto the transom , so at this point i will move to next step.
#2)remove the motor , flip the boat and do some minor underside work . Build a cradle , flip the boat onto the cradle .
#3) remove the rest of the floor ( livewells and ect. )
#4) start transom removal and rebuild , then install deck

 

[Woodonglass]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Sounds like a plan

 

[timewarp]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Quick question , i used the 36 grit on the grinder to cut around the old stringer . I don't want to grind to much off ,or get into the woven part to much , will this be good for when the new glass is laid on the stringer ? I will go out from the stringer alittle more , thats about 8 inches out in the pics below

 

[timewarp]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Can someone let me me know about the above , iam ready to do some more sanding/grinding .

 

[Woodonglass]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Yep, looking good so far. 8" should be good enuf. Don't worry about the mat so much just make sure you get down to good clean glass so the new stuff will adhere properly.

 

[timewarp]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Thank you woodonglass , i wish i had more then a couple hours a night to work on it .

I checked the stringer height at 1 foot intervals , but also noticed the stringer in most places is not even to where the deck would sit . The back of stringer is about 1/2 inch low and up to the front is about 7/16 th inch to high. Is this something to worry about now or just make the stringer slightly taller and trim it down later ?

I will need to fill the keel full of Pl so its even with the hull correct ?

 

[jonesg]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Better the stringers are too high up front, that way the deck can drain and be self bailing.

You can set the stringer to deck height by placing little clay balls on top of the stringers and laying the deck down, examine the clay balls to see if they are contacting the deck. Chrysler placed wads of chopped mat on top of the stringers then drizzled resin into it and plonked the deck down.
You can see that in your own pics.

I found an easier way, run a thick bead of PL premium construction glue along the top of the stringers,
you'll have 45 minutes to work with it compared to 15 mins for resin.

I measured my stringer height from the hull to the top of the stringers before removing them, that simplified installation.

Not sure why you'd want to fill the keel with PL, that might be the main drain.
When in doubt look at what chrysler did for clues. We have a tendency to over engineer .

 

[timewarp]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Thanks jonesg , i keep reading people say set the stringer in pl . I try to find other pictures similar to how mine is now but i have yet to find another one redone with just one stringer . On mine , under the stringer is foam -- same foam the was beside the stringer . Looking again at the pictures of mine iam wondering if they set the stringer and only did certain spots with glass to hold it and the use 2 part foam to get under it and around it for structual purposes . That would explain why only some of the stringer had mat .

I went and looked thru threads and drewpsters rebuild looks similar to mine ( after he cut everything out ) His has the main stringer and 2 shorter stringers , Mine with the one just seems like it wouldn't do much or be safe . Thats probally the over engineering you speak of . I like the idea of pl on top of stringer and considered doing this where the edge of the new floor will sit also .

 

[timewarp]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Almost done grinding and cleaning I just need to know what to do with the stringer now , since mine only uses a keel stringer and by looking at how it was ( if its original ) the stringer was sitting level with hull and appers it was solid foam in the keel under the stringer . The keel starts almost flat but quickly goes to just over 1 inch deep for most of the stringer run.I want to use Pl to bed the stringer, but is this to thick ?( 1 inch ) . Or would i be better using foam to fill it , and if so on the foam , is it 2 part foam to fill it and still use pl to fillet so i can get the glass to lay better ?

My ms paint skills are horrible , but heres what iam meaning .

 

[drewpster]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

On my thundercraft I filled the keel because the thickness of fiberglass under the main stringer was very thin. The OEM built the hull in a mold. The slot that forms the keel was very narrow. Instead of doing it correctly it looks as thought they used light weight fiberglass to form the keel. It was very thin and brittle. To fix it, I used strips of roving and mat and completely filled the keel over a couple of days. 1 inch of PL is really too thick. I would either fill the area under the keel stringer or, cut the stringer to fit the slot, then lay the stringer in place. The most glue you will need under the stringer is about a 1/8 inch. This is plenty to bed it, you just need to pay close attention to fitting it to proper height and profile where it meets the hull. The idea is to keep the wood out of contact with the fiberglass of hull, avoiding hard spots.
If you decide to fill the low area in the keel keep in mind that you should add layers of fiberglass in incriments. Dont do it all at one time. Laying all of it wet that thick will cause excessive heat as the glass cures. It may crack. You may also want to consider some other form of filler, like shims and tickened resin with fibers or even fll it with wood shims. 1 inch of fiberglass is very thick.
To bed the stringer use some cross bars cut from 1x1 or some strips of scrap you have laying around. Cut them and screw them crossways across the top of the stringer so that they rest in the deadrise of the hull and support the stringer in position off the hull. You need about 1/8" of open space under the stringer when you put it in place. When you get that good, remove the stringer and get it out of the way. Then run a bead of PL down the length of the keel. Place the stringer back in place and let the PL sqeeze out along the stringer evenly. Have a scraper and some paper towels handy so you can scrape off the excess glue that squeezes out of the gap. (dont try to use the glue to fillet the inside corners, scrape that off) Let the glue cure a couple of days and remove the supports. WALLLA! The glue will hold the stringer in place while you glass it.

 

[timewarp]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

Thanks Drewpster , sadly i ran into some title issues and looks like i'll be be getting rid of the boat .

 

[oops!]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

hi bud...you can allways register the boat as a u built....that way.....no worries

 

[timewarp]

Re: Went to get some supplies , now iam lost again .

Re: Went to get some supplies , now iam lost again .

hi bud...you can allways register the boat as a u built....that way.....no worries

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