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Stringer in small foilbord?

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TomW
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Local Beach: Vejbystrand, Lomma
Gear: TW Surfboards hydrofoil board 90cm, 110cm
Gong Pro M, 90 cm mast
Ozone Hyperlink 9mUL, 7m
Hyperlink V2 13m
Concept Air Wave 4,5m
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Re: Stringer in small foilbord?

Postby TomW » Mon May 04, 2020 9:32 pm

:) Are you guys are winding me up?

Jake, save some work and drop in a high density foam block and put the tracks in that.
Then do symmetric lamination top and bottom. An asymmetrical laminate is a waste of materials when building a cantilevered beam. Its basic engineering. Only exception is adding deck patch for compression strength.
If you don't have any unid carbon to add to both sides, you can add lams of glass 160 mm wide , make them progressively shorter , keeping all layers under the mast. Do the same on deck. Symmetry!!.

TomW
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Posts: 3288
Joined: Wed Oct 05, 2005 6:43 pm
Kiting since: 2001
Local Beach: Vejbystrand, Lomma
Gear: TW Surfboards hydrofoil board 90cm, 110cm
Gong Pro M, 90 cm mast
Ozone Hyperlink 9mUL, 7m
Hyperlink V2 13m
Concept Air Wave 4,5m
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Location: Sweden
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Re: Stringer in small foilbord?

Postby TomW » Mon May 04, 2020 9:43 pm

1bd50688-7884-442e-8158-17de6825d693.png
If using xps or low density eps. 6 oz glass. Both sides!
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JakeFarley (Mon May 04, 2020 10:34 pm)
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JakeFarley
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Re: Stringer in small foilbord?

Postby JakeFarley » Mon May 04, 2020 10:33 pm

Thanks TomW - did not mean to wind you up...

Also thought about getting this track box - https://www.mackiteboarding.com/ride-en ... track-box/
Available June 2020.

TomW
Very Frequent Poster
Posts: 3288
Joined: Wed Oct 05, 2005 6:43 pm
Kiting since: 2001
Local Beach: Vejbystrand, Lomma
Gear: TW Surfboards hydrofoil board 90cm, 110cm
Gong Pro M, 90 cm mast
Ozone Hyperlink 9mUL, 7m
Hyperlink V2 13m
Concept Air Wave 4,5m
Brand Affiliation: None
Location: Sweden
Has thanked: 38 times
Been thanked: 109 times

Re: Stringer in small foilbord?

Postby TomW » Tue May 05, 2020 8:26 am

JakeFarley wrote:
Mon May 04, 2020 10:33 pm
Thanks TomW - did not mean to wind you up...

Also thought about getting this track box - https://www.mackiteboarding.com/ride-en ... track-box/
Available June 2020.
you can buy that. It will save work. Other option is to buy the boxes separate and get some HD foam and build it yourself. You might save 30-40 dollars if you shop around.
building it yourself is easier that the process of adding stringers and then the boxes. The stringers are not going to replace the need for HD foam anyway.

Im in EU, so i buy BigHeads from EasyComposites in UK. Then i embed 4 of these in HD foam blocks in fixed position. Im riding strapless and know where the foil should be on board, so no need for adjustment.
The Bigheads cost 2.20$ each. So 9$ a board.

kollac
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Re: Stringer in small foilbord?

Postby kollac » Tue May 05, 2020 1:57 pm

TomW wrote:
Tue May 05, 2020 8:26 am


you can buy that. It will save work. Other option is to buy the boxes separate and get some HD foam and build it yourself. You might save 30-40 dollars if you shop around.
building it yourself is easier that the process of adding stringers and then the boxes. The stringers are not going to replace the need for HD foam anyway.

Im in EU, so i buy BigHeads from EasyComposites in UK. Then i embed 4 of these in HD foam blocks in fixed position. Im riding strapless and know where the foil should be on board, so no need for adjustment.
The Bigheads cost 2.20$ each. So 9$ a board.
Hey Tom - I've been wondering about this. I've followed your builds and appreciate how clean they are. How have you determined the optimal position for the mast with respect to the board? Is there a rule, formula, whatever? I'm new to foiling and love to play in my shop so a foilboard is on the list for some time this year. Thanks!

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jumptheshark
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Re: Stringer in small foilbord?

Postby jumptheshark » Tue May 05, 2020 2:06 pm

Rails are Probably nice but unnecessary on a dedicated strapless board. My pocket board has three sets of inserts. Pretty sure it would accommodate almost any plate mount foil.

TomW
Very Frequent Poster
Posts: 3288
Joined: Wed Oct 05, 2005 6:43 pm
Kiting since: 2001
Local Beach: Vejbystrand, Lomma
Gear: TW Surfboards hydrofoil board 90cm, 110cm
Gong Pro M, 90 cm mast
Ozone Hyperlink 9mUL, 7m
Hyperlink V2 13m
Concept Air Wave 4,5m
Brand Affiliation: None
Location: Sweden
Has thanked: 38 times
Been thanked: 109 times

Re: Stringer in small foilbord?

Postby TomW » Tue May 05, 2020 6:56 pm

kollac wrote:
Tue May 05, 2020 1:57 pm
TomW wrote:
Tue May 05, 2020 8:26 am


you can buy that. It will save work. Other option is to buy the boxes separate and get some HD foam and build it yourself. You might save 30-40 dollars if you shop around.
building it yourself is easier that the process of adding stringers and then the boxes. The stringers are not going to replace the need for HD foam anyway.

Im in EU, so i buy BigHeads from EasyComposites in UK. Then i embed 4 of these in HD foam blocks in fixed position. Im riding strapless and know where the foil should be on board, so no need for adjustment.
The Bigheads cost 2.20$ each. So 9$ a board.

Hey Tom - I've been wondering about this. I've followed your builds and appreciate how clean they are. How have you determined the optimal position for the mast with respect to the board? Is there a rule, formula, whatever? I'm new to foiling and love to play in my shop so a foilboard is on the list for some time this year. Thanks!
Short story: depends on foil, and somewhat your personal style. There's no formula, that's why production boards use tracks.

Long story:
I started with a big Moses T40. I was really just beginning, the first 3 times on the water and realized the board was way too large. And rear screws for mast plate were 250mm from the tail. It seemed excessive. So I reinforced a 5-0 surfboard I had built and put the mast 200mm from the tail. Then I learned on it. After 50 hours I knew where I was putting my feet and my rear foot was never behind the mast plate. I was on moses 550 then.
I built a dedicated foil board 135cm long and moved it back to 150mm. I spent another 50 hours on it. Then built a 120cm and moved rear screws to 100mm. By this time i got the 590 wing and then the 633 wing. My stance was a bit more forward on the 633. I still had tail not used. Then I built a 90cm, 105 cm and 110 cm board series. Moved it back to 80mm at rear holes.
All of these boards worked really well. So now i build all my boards with 80mm to rear screws. Now i am on Gong Pro M and it has same stance as moses 633. The gong i can do poo stance and move rear foot back and push upwind hard. I still have my Little kick pad behind my rear foot.
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kollac (Tue May 05, 2020 9:49 pm)
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