Im building a hydrofoil board atm.
Its mostly about shaping it for maximum glide and release to get the board out of the water on to the foil.
Having surfed and made my own equipment for 30 years i couldn’t think of purchasing one.
Im enjoying the build i haven’t posted boards on swaylocks for along time and i fluff about and procrastinate alot now im olderso don’t have a deadline.
Just looking forward to riding waves differently
It will be mostly used with a wing or a sup padle.
Ill post photos now and again and happy for any feadback in the process.
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Looking good!
What are your plans for mounting the strut/mast?
Back a few years ago, the ‘shape shack’ subforum of standupzone.com had quite a few builds of foil craft. I have not been online there recently.
Ive reinforced the mast mount zone with 2 peices of gaboon marine ply around 3’ long with back blocking each end and were the mast mount is positioned 1 1/2" thick red ceder blocking, the structure is through to the deck.
The mast mount will be 1 1/2" ceder routed flat into the bottom this part will be to mount the tracks.
The ply was chosen for its strength to weight as a structure it should spread the stress better than the shop boards. Ive considered the weight compared to just using high density pu foam inserted and its not much compared to the benefits of the structural advantage I will gain.
Im around 105 kg and 6’5" tall so hence the overkill.
I do and repair more and more foil craft, surf and kite first, now sup and wing. I think you are right with your ply wood connected mast rails to deck. I would extand ply wood deck side so it “conected” booth foot to foil. One key for strength for me is to have a foot+foil plateforme ultra stiff by itself so the rest of the board is only for flotation and is build as light as possible.
Yes my consideration making the strigers roughly the length of a comfortable feet spacing was to create a mechanical conected structure from rider to foil and responsibly judging the spacing of the wood members to only reflect engendered necessity.
Was just a guess, im fairly confident it will take more abuse than the retail variety im not a propeller head just an old surfer in a shed.
Thamks for your thoughts
Spent some time this morning with the router making the ceder track mount fit in to the stringers and bulkheads.
I would have had it glued in but one of my children had car troubles so i spent the rest of sunday on the spanner 
.
Was covered in grease so called it a day.
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Solid ceder plank 1 1/2 "x 7"x 4’ glued in with Polyurethane glue.
The brand i use is sika it doesn’t contain any acetone or chemical that could effect the eps.
It foams up during curing and helps avoid bottomless voids that cause draining when laminating.
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