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Sanding foils? Trying to understand why and how?

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richy-c
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Re: Sanding foils? Trying to understand why and how?

Postby richy-c » Tue Apr 30, 2019 1:26 am

gmb13 wrote:
Mon Apr 29, 2019 7:52 am
jakemoore wrote:
Mon Apr 29, 2019 12:52 am
It can help a lot to reduce the noise if the hydrofoil sings.
It can, but mostly the singing comes from a "dirty" trailing edge. If your foil sings loudly, then fix the trailing edge first. There are lots of tutorials online on how to do this.

--
Gunnar
Thanks for the info. Are there any tutorials you know of for sanding the foils? Im just thinking if i ever need to repair my moses what id need to do. I used to be a car detailer so im quite good with the paper 😊

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gmb13
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Re: Sanding foils? Trying to understand why and how?

Postby gmb13 » Tue Apr 30, 2019 8:20 am

richy-c wrote:
Tue Apr 30, 2019 1:26 am
gmb13 wrote:
Mon Apr 29, 2019 7:52 am
jakemoore wrote:
Mon Apr 29, 2019 12:52 am
It can help a lot to reduce the noise if the hydrofoil sings.
It can, but mostly the singing comes from a "dirty" trailing edge. If your foil sings loudly, then fix the trailing edge first. There are lots of tutorials online on how to do this.

--
Gunnar
Thanks for the info. Are there any tutorials you know of for sanding the foils? Im just thinking if i ever need to repair my moses what id need to do. I used to be a car detailer so im quite good with the paper 😊
Hi.

These tutorials from George might help. I decided not to publish any tutorials on how to sand foils, as most people do/can not do it properly and do not take their time and will end up ruining their foil. As a car detailer you know that good sanding takes time and can't be rushed, and it also takes some practice to get good at it.


Here is how to sand your trailing edge to get rid of noise



Here is how to deal with scratches



--
Gunnar
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Matteo V
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Re: Sanding foils? Trying to understand why and how?

Postby Matteo V » Thu May 02, 2019 3:20 pm

gmb13 wrote:
Mon Apr 29, 2019 7:50 am
Contrary to popular belief, all Foils ventilate at some point.
Do you mean that "all masts ventilate..."?

Would a fuselage, properly sanded prevent the ventilation from reaching the wing? Any vids of the ventilation actually making it from the surface, down to the fuselage, and down to the wing (standard, not canard) setup?

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gmb13
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Re: Sanding foils? Trying to understand why and how?

Postby gmb13 » Thu May 09, 2019 9:06 pm

Matteo V wrote:
Thu May 02, 2019 3:20 pm
gmb13 wrote:
Mon Apr 29, 2019 7:50 am
Contrary to popular belief, all Foils ventilate at some point.
Do you mean that "all masts ventilate..."?

Would a fuselage, properly sanded prevent the ventilation from reaching the wing? Any vids of the ventilation actually making it from the surface, down to the fuselage, and down to the wing (standard, not canard) setup?
No. Both Masts and Wings can ventilate. Wings will ventilate after breaching unless they are designed to not do that (Mikes Lab, Chubanga V2, Moses Comet 2018)

I used to have one, but I cannot find it anymore. I will post it if I find it. For now, here is a usual mast ventilation



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Gunnar

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Re: Sanding foils? Trying to understand why and how?

Postby Tone » Thu May 09, 2019 9:10 pm

I went to 3000 grit and it was a pain to keep finished.

I now ride 1000 as I am not racing and that's fine for me.


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