Here you can exchange your experience and datas about your home build boards
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daspi
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Postby daspi » Thu May 28, 2020 5:11 pm
kollac wrote: ↑Thu May 28, 2020 2:13 pm
I have leftover cedar from my MAKO twintip build (I ripped it into strips and built the same way you'd build a kayak/canoe). I may rip the remaining board into flat 3/8 inch boards/wide strips and make my own "plywood". Just force some shape into it when I glue it all up to achieve rocker and maybe some minor concave.
Sounds interesting. I'd like to follow your build, keep us posted ether here or start a thread.
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Wbrussow
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Postby Wbrussow » Sun Sep 13, 2020 3:12 am
Hello, for my foil board build, here is my plan:
1/2” XPS core
1/8” ply top and bottom
3/4” half round to cap the perimeter
1/2” x 6inch wide core between feet (also what the mast will bolt to)
I doubt I will need more than a 4oz glass layer on top and bottom, though I am open to suggestions. I am hoping someone can give me insight as to how much epoxy to buy. Not looking to have a bunch left over. The foil is an LP kite foil, 720cm^2 wing
Cheers!
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Breze
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Postby Breze » Sun Sep 13, 2020 11:32 am
Here is a laminate calculator
https://www.r-g.de/en/laminatecalculator.html
Can not help you with yout initial question, as you don`t mention lenght and width.
Remeber the wood will drink a lot. Better some left over , than running out of epoxy.
Overthink ply on bottom, it will be heavy. Think instead of a leash for your LP
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Wbrussow
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Postby Wbrussow » Sun Sep 13, 2020 4:50 pm
Thanks Breze,
I am not familiar with a leash for Hydrofoils. Still so new to this that I have never tried foiling. Where would I attach the leash to Hydrofoil?
For board size, I am thinking about about 5ft x 22”
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Breze
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Postby Breze » Sun Sep 13, 2020 5:52 pm
5ft x22" or 150x 55 is way too big. If you are kind of normal size go for 130x46
It seems that bonding Xps / wood works better with a PU glue. That was the result of a test a very good board builder did, he compared diff bondings. Epoxy works, but PU was way better.
The leash could be a simple 4mm dyneema line between your nice LP and the tail of your board eg the back strap. You wouldn`t be the first who ripped out his foil.
I built my sec board like this
viewtopic.php?t=2400849. Now i enjoy a nice production board.
But i would recommend you to buy a used one or a cheap Gong , this :
https://www.gong-galaxy.com/en/product/ ... ch-fsp-2x/
Edit, here you can see the leash foil to board
https://oaseforum.de/attachment.php?att ... 1477247433
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Wbrussow
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Postby Wbrussow » Sun Sep 13, 2020 6:20 pm
Thank you for taking the time to answer, Breze. I appreciate it!
The LP has a lengthy mast, 100cm. Probable not the best for learning, but I got it for a great deal. 600 CAD. I was thinking of making the board longer to help with not catching my front edge while learning. I also have an older Liquid Force 5’3” fish, but suspect it is not nearly strong enough to directly mount the foil, otherwise I would just drill some holes and “send it”.
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daspi
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- Gear: Neo 9/7m, Eleveight FS 12m, 9m and Core XR5 7m, Core Section 8,10,12m
and lots of other junk kites in the shed
Cabrinha Custom, Duotone Jamie Textreme
Surfboards: F-ONE Mitu 5'6", Tomo Vader, Kiteloose Nirvana, Cabrinha Skillit
Foil: F-ONE Pocket with Cloud 9 mast and wing
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Postby daspi » Mon Mar 22, 2021 3:17 pm
Actually the LF fish boards are strong enough. Just drill and off you go. I had one and it lasted well.
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BWD
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Postby BWD » Mon Mar 22, 2021 4:47 pm
If you use 2.5mm birch ply you dont need any glass, but you should make the core at least 1”/25mm thick under the foil and stance area. This should be very strong and stiff. Also this ply is usually US $12-15 for a 150x150cm sheet, and used by cabinet makers all over northern hemisphere. I have built surface directionals this way and it is rock solid, if not that light....
I would include partial stringers under the foil mount and stance area though, especially the foil mount because of compression and point loading. Stringers could be ply strips or light wood -anything to handle compression better than foam.
6-12oz tape over the rails is good. Epoxy glues plywood to xps very well, fyi.
For dimensions, if you are over 75kg or foil in light wind, I would go for something like 48-50 cm x 120-140 according to your preference.
A little extra width/float does help waterstart and restart in touchdowns in light wind. Build a 110x40 mini board when you get to the pirouettes and strapless air jibes, my take.
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Mikey
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Postby Mikey » Wed Aug 31, 2022 7:08 pm
@BalsaMichel do you have pricing for this ? looks great (but expensive)?
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