Time for another (1979 23' Resto)

[wgscott329]

Almost to the fun part! you will love the under deck storage space with the grid stringer system, worth every bit of work to do it

[SeaPlusPlus]

Originally Posted by wgscott329

Almost to the fun part! you will love the under deck storage space with the grid stringer system, worth every bit of work to do it

Awesome! Glad to hear you're loving yours, hopefully see you out on the water some day along with some of the other CHS SeaCraft enthusiasts.

Not a lot of photographic documentation from this weekend. Probably put in 8 hours or so of work on the boat across Sat and Sunday but it was mostly just grinding away the old stringer lips and getting that area ready for new glass.

Weekend started off with an early end to the work day Friday for our annual site oyster roast. Though I prefer clusters when roasted, but I'm not going to complain when selects show up. I probably ate close to 4 dozen.



Saturday morning I set to the task of cutting out the battery box stringers so I can get that area prepped for the new stringer. LOTS of nasty wet wood.







I had most of it out when the inspector showed up to make sure I was doing it right:



One side done, rinse and repeat for the other:



Farted around here and there but didn't get much else done on Sat, ended up taking the kids out to dinner and then enjoying the evening with wife and neighbors.



Sunday morning woke up slightly hung over, wife had a wedding she had to go shoot, but figured the best way to get rid of it was sweat it out. Got the kids dressed and set up with their ride on toys cruising around the cul-de-sac, suited up, and climbed in the boat with grinder in hand.



Grinding, grinding, and more grinding. This was the only picture I took during, ya'll get the idea. Also the only reason those stringers are still in there is because they give me a place to sit, boat yoga sucks!



A few hours later:







Definitely more grinding to do, but I made a sizable dent. Hoping to take advantage of the holiday week and knock out the rest of the grinding and prep work by the end of the week.

Thanks for looking!

[strick]

This is the best time of the year to be working on boats. Work slows down a little. Seeing your young ones reminds me of when mine were that small. They wanted to help out as well. Get your self a bunch of painters spray socks to cover your face/head. Nice work thanks for posting.

strick

[SeaPlusPlus]

Originally Posted by strick

Seeing your young ones reminds me of when mine were that small. They wanted to help out as well.

They definitely want to help, my 5 year old loves "helping" haha.

Not much photogenic work done this weekend, more grinding, pretty much done except for a few spots that I'm going to hit with some 60 grit sandpaper.





Also got the rest of the stringers cut out and lips ground down:



Weather was nice Sunday so after washing my wife's SUV and my truck I gave the boat a bath to get rid of the dust, and any oil/etc that would prevent the glass from getting a good mechanical bond. Dawn and a pressure washer cleaned her up nice.





I had to grind out some voids in the hull bottom here and there, plan is to cut some glass to build those voids back up and then put a layer of 1708 along pretty much the entire bottom where I ground. Probably unnecessary and a waste of glass and epoxy, but I feel that it will a) give me peace of mind that I'm putting back what I ground out and b) give a good surface for stringer tabbing to bond.

Also, the boat fairy (UPS) stopped by today and dropped of a present, my only Black Friday purchase this year, a case of 1/2" Divinycell H45 (25 sheets, 32" x 48"). This will be used for coring my hull sides since I'm not using the liner. At $28/sheet shipped I could not pass it up.



Will definitely have an interesting mixture of composite material on this boat, so far I'm planning on (and have purchased materials for):

• Coosa cored transom

• Honeycomb cored sole

• Honeycomb cored cap

• Poly foam cored stringers

• Divinycell H45 cored hull sides

Finally a ran some numbers for my stringer layup and I'd like to get you all to QC it if you don't mind. The core is 2lb/ft³ poly foam, so I'm not getting any strength from it, just a form so the lamination schedule has to be strong to give me the longitudinal strength I need. I'm planning on 3 layers of 1708 (45/45) overlapping the stringers with 2" less wide each layer (48" wide, 44" wide, 40" wide), then I plan on adding an overlapping layer at 36" wide of triaxial (0/45/45) and a cap of triaxial at 14" wide. I plan on the triaxial to get some fibers running directly along the stringer (0 degree), which is where the load is on stringers. The triaxial I'm planning on using has 16.72 oz/yd² of glass oriented at 0, and 8.85 oz/yd² in each 45 direction, with stitching its listed at a total of 34.6 oz/yd², no mat, heavy duty stuff.

Anyways, my research/estimate has the layup with a total thickness of 0.185", which is slightly less than the original stringers, but between the additional strength/elasticity of the epoxy (vs polyester) and the added strength of the biax/triax (vs woven/matt) the stringers should be overkill (which is what I want).

In case that description wasn't clear, here is a depiction of what I'm talking about:



And here are some estimates about each layer, let me know what you think (yes, I over analyze and over think EVERYTHING).



Thanks for looking, starting to glass soon!

[strick]

Looking at the inside of your boat it appeared to have been snowing but then the roof tops in the background are clean lol. The keel stringer is oval...like PVC glassed over? ..I dont remember seeing that in other 23's....maybe I missed something?

strick

[SeaPlusPlus]

Originally Posted by strick

Looking at the inside of your boat it appeared to have been snowing but then the roof tops in the background are clean lol. The keel stringer is oval...like PVC glassed over? ..I dont remember seeing that in other 23's....maybe I missed something?

strick

Yup it's PVC cut in half and then glassed over, not sure when Potter started it but this boat was made in 1978 (titled in 1979), so they were doing it by then!

Couple people reporting they have the same in this thread.

On mine the front section is completely clogged up, I tried to clean it out with the pressure washer but it is good and clogged. Gonna try to use a pipe snake and poke around a bit but might end up cutting it out so I can clean it out and then reglassing another cut in half PVC pipe. Waiting till I get stringers back in the boat though as currently its my only longitudinal stiffener.

[dirtwheelsfl]

The lams are plenty stout... But trying to do all those giant wide pieces in the boat is gonna be a royal pain unless youve got 3 guys who know what theyre doing.

I would get them built/shaped and glass them outside the boat. Then do your tabbing/extra capping afterward.

I would wrap 2x1708 to start before going into the boat. Then in the boat 2x1708 tabs followed by your triax tab (widths depending on stringer height and relation to triax cap overlap). Then do your triax cap getting a nice overlap over the tabbing. Wider tabs first...

Wet the tabs out on a table, roll them up mat side out, roll back into the boat and hardroll. Let gravity wet it out for you on the table, and you also wont be bathing in resin trying to wetout those monster pieces on vertical stringer sides inside the boat!

Same when you do the stringers outside the boat. Sometimes ill run some 3" drywall screws down a plank and set a long piece like that on edge when i want to glass both sides and cap it (top up of course) onto the screws which will hold it vertical. Then wet out on a table, roll up, roll onto stringer, done...

Just something to think about, hope it helps... Chris

[ohreally]

Just a thought on lamination. I've always layered short to large during the build up, meaning basically the opposite of your diagram. This way, each lamination piece has "skin in the game" so to speak. If you do it the opposite way the bottom sheet is the only adherence to the hull bottom. doesn't matter how thick you lay-up the rest. Not criticizing, just my thought.

[Enyar]

Originally Posted by ohreally

Just a thought on lamination. I've always layered short to large during the build up, meaning basically the opposite of your diagram. This way, each lamination piece has "skin in the game" so to speak. If you do it the opposite way the bottom sheet is the only adherence to the hull bottom. doesn't matter how thick you lay-up the rest. Not criticizing, just my thought.

I believe this is the opposite of what you're going for. Better to get maximum mechanical bond with the first layup since all the others will have a chemical bond.

[haynow7767]

Happy New Year!!

Tony