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Pocket board building

Here you can exchange your experience and datas about your home build boards
loco4viento
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Re: Pocket board building

Postby loco4viento » Mon Jun 08, 2020 5:18 pm

Beautiful work!

wallydog
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Posts: 27
Joined: Tue May 28, 2013 7:41 pm
Local Beach: Barbwire beach
Favorite Beaches: Los Barriles and Gorge
Style: surf and foil
Gear: North Pacific surfboard. Cloud X22 and X24 wings. Slingshot SSTs
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Re: Pocket board building

Postby wallydog » Mon Jun 08, 2020 9:41 pm

loco4viento wrote:
Mon Jun 08, 2020 5:18 pm
Beautiful work!
Agreed :thumb:
How did you laminate the wood to the foam? Looks like a concave deck.

direnc
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Local Beach: Alacati, Pirlanta, Ilica
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Gear: Soul 10/12, Edge 9/11, Ride 10, Cult 7.5, Zephyr, Mako, DIY foils and boards
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Re: Pocket board building

Postby direnc » Mon Jun 08, 2020 11:00 pm

wallydog wrote:
Mon Jun 08, 2020 9:41 pm
loco4viento wrote:
Mon Jun 08, 2020 5:18 pm
Beautiful work!
Agreed :thumb:
How did you laminate the wood to the foam? Looks like a concave deck.
Thank you guys! Yes the deck is concave so as to make the board stiffer. The plywood is glued to XPS foam with marine PU wood glue. Here is how I did it:
Applied glue to all surfaces and joined them over a wooden bench.
Screwed a 20x60x2cm block of wood on top. (15cm from the back of the board, to keep foil mounting area flat).
Raised the rails by 18mm using pieces of wood.
Raised the nose by about 12cm to form nose rocker.
Weighed it down with salt bags/water bottles etc.
Clamped/screwed any areas that have gaps between layers.

They have 2x200g glass on bottom and 1x200g on glass on top. Also extra layers over foil mounting area.

wallydog
Rare Poster
Posts: 27
Joined: Tue May 28, 2013 7:41 pm
Local Beach: Barbwire beach
Favorite Beaches: Los Barriles and Gorge
Style: surf and foil
Gear: North Pacific surfboard. Cloud X22 and X24 wings. Slingshot SSTs
Brand Affiliation: None
Has thanked: 1 time
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Re: Pocket board building

Postby wallydog » Wed Jun 10, 2020 5:13 pm

Thanks. So you do the top ply, foam core and bottom ply in one glue-up step? WOW.

direnc
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Posts: 145
Joined: Sun Jul 22, 2012 11:50 pm
Kiting since: 2009
Local Beach: Alacati, Pirlanta, Ilica
Style: Freeride
Gear: Soul 10/12, Edge 9/11, Ride 10, Cult 7.5, Zephyr, Mako, DIY foils and boards
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Has thanked: 13 times
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Re: Pocket board building

Postby direnc » Wed Jun 10, 2020 10:33 pm

wallydog wrote:
Wed Jun 10, 2020 5:13 pm
Thanks. So you do the top ply, foam core and bottom ply in one glue-up step? WOW.
Yes, all done at once. Not difficult, only have to be quick while spreading the glue.

wallydog
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Posts: 27
Joined: Tue May 28, 2013 7:41 pm
Local Beach: Barbwire beach
Favorite Beaches: Los Barriles and Gorge
Style: surf and foil
Gear: North Pacific surfboard. Cloud X22 and X24 wings. Slingshot SSTs
Brand Affiliation: None
Has thanked: 1 time
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Re: Pocket board building

Postby wallydog » Thu Jun 11, 2020 5:16 pm

And don't run out of clamps...

kriskris
Medium Poster
Posts: 67
Joined: Wed Nov 21, 2012 1:32 am
Kiting since: 2003
Weight: 162
Local Beach: Crack Park
Style: Foil
Gear: 633 Onda/42" Dwarfcraft, Peak4 5m, Core Section 6m, 9m
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Re: Pocket board building

Postby kriskris » Sat Jun 13, 2020 2:18 pm

So I learned a valuable lesson in Vacuum bagging. I was helping my friend to buila a board. It was 20kg foam that he hand laminated with 4 or 6 oz.glass/epoxy layer. Once it cured he proceeded to vacuum bag deck with carbon fiber twill. Full vacuum at 28. It still uniformly crushed the board on deck and indented bottom especially where breather was bunched up
What is the safe vacuum pressure range for lower desity foams 1lbs/foot cube or 20kg/m cube?

handy
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Gear: wave
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Re: Pocket board building

Postby handy » Sat Jun 13, 2020 6:26 pm

I do 20kg/m3 with 0.6 bar
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kriskris (Sun Jun 14, 2020 12:01 am)
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kriskris
Medium Poster
Posts: 67
Joined: Wed Nov 21, 2012 1:32 am
Kiting since: 2003
Weight: 162
Local Beach: Crack Park
Style: Foil
Gear: 633 Onda/42" Dwarfcraft, Peak4 5m, Core Section 6m, 9m
Brand Affiliation: None
Location: Satellite Beach, FL
Has thanked: 11 times
Been thanked: 2 times

Re: Pocket board building

Postby kriskris » Sun Jun 14, 2020 1:49 am

Thanks for the info. Will try 0.6 next time! What lay up do you recommend with this foam for pocket foilboard Handy?

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bay surfer
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Re: Pocket board building

Postby bay surfer » Mon Jun 15, 2020 7:42 pm

Decided I needed a pocket board for a new large floaty wing I made. XPS foam, cedar stringers, 110cm by 46cm so far pressed some 6 oz carbon on top and for pads. Plan for the bottom carbon down bottom and one layer around box. Planning on glassing top and bottom with 2 layers of 6oz glass which will be wet sanded and painted (no hot coat). Question is it overkill?
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