Quote:
Originally Posted by strick
Seeing your young ones reminds me of when mine were that small. They wanted to help out as well.
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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):
- 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
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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!