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Board top profile?

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Tinkersailor
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Board top profile?

Postby Tinkersailor » Fri Sep 25, 2015 3:56 pm

The rocker and edge profiles are done. This is my firs KBHF. I will learn on this board so i am looking for advice on how to shape the top side and where to place my strap mounting points relative to my mast (mast will have base plate with 9mm spacing and be adjustable in rails fore and aft). Aee pictures and thanks for any input.


Leigh
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Last edited by Tinkersailor on Fri Sep 25, 2015 4:33 pm, edited 1 time in total.

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Hawaiis
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Re: Board top profile?

Postby Hawaiis » Fri Sep 25, 2015 4:25 pm

Nice, I prefer a flat top with rounded edges. The rear foot strap should be around the mast/strut. The front strap should be your comfortable stance. 2-3 feet in front of the rear foot strap.

Tinkersailor
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Re: Board top profile?

Postby Tinkersailor » Thu Oct 01, 2015 5:38 am

Well I guess I am going to go just a little convex on top. I decided to add a cedar and carbon grid for stiffness. Goo plan? Also what is the preferred insert option for straps ( non metallic?).
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Edge19
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Re: Board top profile?

Postby Edge19 » Thu Oct 01, 2015 11:44 am

The cedar is over kill, trust me I'm on my second board now. Just because I'll be needing a Tuttle connection and did not want to dig out my board tofit one in.
But basically I used
1 layer 100g glass top and bottom
2 layers 200g carbon on bottom with a patch 600g carbon where the platemount goes.
1 layer 220 g carbon/Kevlar on top
1 length of 10cm uni carbon folded layed flat in a shallow channel. Under the carb/Kevlar
plus some carbon over the foot pressure areas.

It's strong as anything and not to heavy. And less work.

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Tinkersailor
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Joined: Sat Feb 28, 2015 2:08 pm
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Local Beach: Lurgan beach, Ontario, Canada.
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Re: Board top profile?

Postby Tinkersailor » Thu Oct 01, 2015 1:34 pm

Thanks for the input. I am stuck with my grid now that I have trenches in my board. I guess I could rebuild the grid with foam and use the carbon anyway but that seems like a lot of work for little benefit.

Do you think I should incorporate a turtle box along with my base plate mounting rails?

Are Tuttle boxes easily obtained?

Cheers,

Leigh

Edge19
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Re: Board top profile?

Postby Edge19 » Thu Oct 01, 2015 1:52 pm

Obviously you have put a lot of work into the grid etc. It wil be mega strong but the main draw back will be weight, by the time thou get glass, resin, pads, eva and inserts on her.

I modified a board after building this foil, and talk about over engineering lol it weighed a ton. After I'd had enough of it I made this board and it totally changed the experience.

As far as boxes etc it depends on what you want to use with it obviously, foil wise I mean. If you look at other foils n boards the actual strut placement varies quite a lot. Would be nothing worse than sticking it all in then finding out you need to move it 50mm. Is it your own foil or a branded foil?

Tinkersailor
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Local Beach: Lurgan beach, Ontario, Canada.
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Re: Board top profile?

Postby Tinkersailor » Thu Oct 01, 2015 3:30 pm

Thanks again.

I just bonded the grid in. No turning back now!

It is my own foil and board construction. The section was supposed to be a H105 but it has ended up being a little thinner. Hopefully with good results. It is plenty strong being mostly uni carbon with low resin content.

Leigh

Edge19
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Re: Board top profile?

Postby Edge19 » Thu Oct 01, 2015 3:42 pm

Cool, as far as strut/ box placement goes, as a rule of thumb, line up the centre of lift to about the middle of your stance. That way you won't be far out. This is what I did and it was pretty much bang on :D

Good luck with it .

Cheers

cosmo
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Re: Board top profile?

Postby cosmo » Thu Oct 01, 2015 6:12 pm

I think that the vertical project of the main wing (center of lift, not the plate or box) must be in the center of the stance.
help.

tkettlepoint
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Re: Board top profile?

Postby tkettlepoint » Thu Oct 01, 2015 11:02 pm

the biggest with a foil board is make it strong down the center for the touch downs and the foil lift points. Edge does great work and he is one of the few I know what has done everything his self in his lab that comes out like the talon did.

great work Edge keep it coming.

Terrie
www.jellyfishboards.com


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