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Yet another diy hydrofoil. The plummet hammerhead

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plummet
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Yet another diy hydrofoil. The plummet hammerhead

Postby plummet » Thu Oct 06, 2016 6:26 pm

Here's some build photo's.
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plummet
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Re: Yet another diy hydrofoil. The plummet hammerhead

Postby plummet » Thu Oct 06, 2016 6:27 pm

IMG_0635.JPG
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plummet
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Re: Yet another diy hydrofoil. The plummet hammerhead

Postby plummet » Thu Oct 06, 2016 6:28 pm

IMG_0630.JPG

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Peter_Frank
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Re: Yet another diy hydrofoil. The plummet hammerhead

Postby Peter_Frank » Thu Oct 06, 2016 7:11 pm

Looking really good Plummet :thumb:

It will work, only a matter of trim regarding straps and rear wing aoa maybe :D

8) Peter

Eltreato
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Re: Yet another diy hydrofoil. The plummet hammerhead

Postby Eltreato » Thu Oct 06, 2016 7:13 pm

That is beautiful, nice work!

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mig27
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Re: Yet another diy hydrofoil. The plummet hammerhead

Postby mig27 » Thu Oct 06, 2016 7:50 pm

Nice work!
Show us some footage of you riding it :thumb:

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tegirinenashi
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Re: Yet another diy hydrofoil. The plummet hammerhead

Postby tegirinenashi » Thu Oct 06, 2016 8:08 pm

I'd question usage of hardwood flooring for the core. This material is usually high density wood; the higher the density, the more scratch resistant the floor surface is. Now, high density translates into weight. Why not to use balsa for core?

plummet
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Re: Yet another diy hydrofoil. The plummet hammerhead

Postby plummet » Thu Oct 06, 2016 8:57 pm

tegirinenashi wrote:I'd question usage of hardwood flooring for the core. This material is usually high density wood; the higher the density, the more scratch resistant the floor surface is. Now, high density translates into weight. Why not to use balsa for core?
Its bamboo core. I used bamboo because bamboo/carbon combo is extremely robust. I use that combo on my landboard and hit rocks every ride. That board is still going strong after many years use.
I have boulders lurking subsurface at my local. I expect at some point to hit one. Thus the rbbust core, additional thickness, bolting, fillets and layup around the fuse/front wing, mast and top plate.

You are right it is heavy. But my only requirement in that regard is that it floats. It floats so i am happy.
Peter_Frank wrote:Looking really good Plummet :thumb:

It will work, only a matter of trim regarding straps and rear wing aoa maybe :D

8) Peter
I am following the delta foil guys advice on rear stab aoa relative to the front. I've set it at 2 deg to begin with. I have no idea where to put the foot straps. So I will roll strapless until i get a handle of where the straps should be.

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Peter_Frank
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Re: Yet another diy hydrofoil. The plummet hammerhead

Postby Peter_Frank » Thu Oct 06, 2016 9:12 pm

plummet wrote:Snip...
I have no idea where to put the foot straps. So I will roll strapless until i get a handle of where the straps should be.
Bad idea IMO - you wont have a chance this way....

And IF you eventually learn without straps, you wont put them on later :roll:

Put one front strap on, so you can learn fast - put it quite forward, then it will be easy and safe, and if it is too far forward, you just put your rear foot further behind - works like a charm this way :thumb:

8) PF

plummet
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Posts: 5935
Joined: Sat Aug 29, 2009 11:25 pm
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Style: Terrain riding
Gear: Old wornout ozone.
Plummet hydrofoil and mutant
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Re: Yet another diy hydrofoil. The plummet hammerhead

Postby plummet » Thu Oct 06, 2016 9:21 pm

Peter_Frank wrote:
plummet wrote:Snip...
I have no idea where to put the foot straps. So I will roll strapless until i get a handle of where the straps should be.
Bad idea IMO - you wont have a chance this way....

And IF you eventually learn without straps, you wont put them on later :roll:

Put one front strap on, so you can learn fast - put it quite forward, then it will be easy and safe, and if it is too far forward, you just put your rear foot further behind - works like a charm this way :thumb:

8) PF
I read the learn with straps/strapless thread and came to the conclusion that the advice was 50/50. But i have nothing to loose by installing a front strap and trying it out. So i will do that.


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