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TomW wrote: ↑

Tue Dec 12, 2017 11:35 pm

Nice work. I've been thinking about making a split hydrofoiling board.
I was thinking a plate on top and bottom.
The one on the bottom would extend under the hydrofoil mast plate and forward and the one on top would be flush with the deck pads, but only in the middle like your plate.

My board will be made with foam Core

Have to think about it.

plummet wrote: ↑

Wed Dec 13, 2017 7:32 am

Awesome build. I do worry that you have created a stress riser at the plate end. I would have radiused the carbon reinforcement so dispersion the stress loading away from the plate.

rynhardt wrote: ↑

Wed Dec 13, 2017 2:40 pm

TomW wrote: ↑

Tue Dec 12, 2017 11:35 pm

Yeah two plates would be fine. They wouldn't need to be thick at all since they would be on both sides of the board. Like 300gsm carbon skins might even be enough.

I did some measuring and marking on my foil board last night.
The bottom part that goes under the plate could be 200mm wide and 700mm long.
If I make it with laminated veneer wood Core like 5 mm thick and cover it with uniD cf and glass, taper thickness towards nose. I would fasten the 675mm long board halves to it. Sort of like the Shinn approach.
Then with 2 small plates on top 50mm wide x 150 mm, close to each rail.
This keeps the deck plate out of the way of the front foothook I use.

I'm concerned this whole thing will bee too heavy.
And how for I pack a 93cm mast with plate??

TomW wrote: ↑

Wed Dec 13, 2017 10:32 pm

rynhardt wrote: ↑

Wed Dec 13, 2017 2:40 pm

TomW wrote: ↑

Tue Dec 12, 2017 11:35 pm

Yeah two plates would be fine. They wouldn't need to be thick at all since they would be on both sides of the board. Like 300gsm carbon skins might even be enough.

I did some measuring and marking on my foil board last night.
The bottom part that goes under the plate could be 200mm wide and 700mm long.
If I make it with laminated veneer wood Core like 5 mm thick and cover it with uniD cf and glass, taper thickness towards nose. I would fasten the 675mm long board halves to it. Sort of like the Shinn approach.
Then with 2 small plates on top 50mm wide x 150 mm, close to each rail.
This keeps the deck plate out of the way of the front foothook I use.

I'm concerned this whole thing will bee too heavy.
And how for I pack a 93cm mast with plate??

2 thoughts for you Tom.

Why not make a 93cm board not split?
Or don't split down the middle 93cm gives you your foot stance and foil attachment. Make a bolt on nose. That way it doesn't need the strength of a half split board. It just needs to withstand touch downs. Less reinforcement, less bolts, less weight.