Im busy building a 110L waveboard.
I have so far done the hull with 106gsm and 5mm pvc with an extra layer of glass in the fin area.
The deck has a recess for 5mm pvc from 15cm in front of mast box to just behind the front straps with another area for the back straps. I will lay up 106gsm then the 5mm pvc with silica resin to make sure it bonds well. All under 0.2 bar vacuum of course.
My question is....do you think it still necessary to add diagonal 200gsm carbon cross over footstrap areas...or diagonal strips over the board from front straps to in front of the mast box. Then add 3mm pvc?
What layup would you recommend for hull and deck with the 5mm and 3mm pvc double sandwich i have planned?
absolutely do a normal layup under heels. Double sandwich helps but there is no substitute for fibre where it gets hammered on
but I see wonky rail tuck, sand your your rocker longways to make sure, then re-check where the tuck meets bottom.
Also, make sure that inset layer for the double sandwich sits a little high by 0.5-1mm, else blank compression under vacuum will make it low and you will need a lot of fill afterwards. Double sandwich is not fun.
On another note, jealous as we just can't get blanks machined here for windsurf etc. Too pricey and/or they make you use their foam so they can mark up 
Thanks Mark
Yes...paid about 160aud which i thought was reasonable seeing as the blank cost alone was about 90-110aud.
Rail tuck still to be fine tuned.
So just feet and mast or must I also add 200mm wide carbon strips diagonally from in front of mast to just behind the front footstraps? I'll also have a 160gsm glass cloth under the 3mm pvc covering the blank.
I would. But I won't say quite how I do it ;-)
double sandwich is better for sure but its still just foam, you need the same deck lam basically. Just have a nice overlap of some kind at the front edge of your double layer, so its not too much of a hinge point
Some more progress... preshaped the 3mm PVC skin after the double sandwich was glued and glassed up. Next step is trickiest with the glassing and bonding of the deck's 3mm sandwich.
That looks great. It's hard to get it so flat with anything inset - very good mate
Select to expand quoteMark _australia said..
That looks great. It's hard to get it so flat with anything inset - very good mate
Thanks....took my time and tried to make it just proud like you suggested.
The deck lam and 3mm PVC didnt go so well....for some silly reason I couldnt get the rails to bond properly in the bag so I had to scrape most of it off of the rails. It was too hot in hindsight and I was rushing to get the suck going. Its the biggest stage of the lamination. I think I should just preglass and suck......... then add the PVC and suck in a seperate stage. Its just too much especially in hot weather.
Select to expand quoteImax1 said..
I don't think you will bust those side fins out. Very solid.
hopefully not!
Isn't the routing so much fun for those Chinook slot boxes 
I wish we could get the Flikka style ones in a square block without paying 4x the price of the Chinook ones ..
Much fun.....first time I've done them but wasn't too bad. I quite like them. Witchcraft reckon they are better than carbon boxes which don't handle fin strikes very well.
