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 Post subject: Re: Building a hydrofoil
PostPosted: Tue Oct 01, 2013 12:01 am 
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Location: Miami @ 6" Flat Butter!
C A R A F I N O 2014 wrote:
To be very honest, it is not easy. there is a lot involved. but you can take two windsurf board fins. laminate them together base to base. make is strong. drill holes to attach to your strut. that will be your front wing. do the same for the rear wings. smaller surf board fins. as for the strut. well that one is not easy. but to have money, use something like plastic and cut it in a cnc. hard plastic.

cnc machines are not cheap so if you can shape it by hand your feel tired but still have your cash.

After that, put it together, mount to the board, try it.

Carafino
I think using windsurf board fins and surf board fins are good ideas :thumb:
And a lot of possibilities, when the right adapter is designed to swap foils on the fuselage :idea:

Meanwhile there is a link with pictures of all popular hydrofoil makers:
HERE!

DrLW


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 Post subject: Re: Building a hydrofoil
PostPosted: Tue Oct 01, 2013 6:08 am 
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DrLightWind wrote:
C A R A F I N O 2014 wrote:
To be very honest, it is not easy. there is a lot involved. but you can take two windsurf board fins. laminate them together base to base. make is strong. drill holes to attach to your strut. that will be your front wing. do the same for the rear wings. smaller surf board fins. as for the strut. well that one is not easy. but to have money, use something like plastic and cut it in a cnc. hard plastic.

cnc machines are not cheap so if you can shape it by hand your feel tired but still have your cash.

After that, put it together, mount to the board, try it.

Carafino
I think using windsurf board fins and surf board fins are good ideas :thumb:
And a lot of possibilities, when the right adapter is designed to swap foils on the fuselage :idea:
...

DrLW


What's the Longest they make those windsurfer fins ; and
where Ya get them cheapest again ?


Carafino : "... something like plastic and cut it in a cnc. hard plastic."

Use Delrin plastic ? I have a 36" Lathe

Bille


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 Post subject: Re: Building a hydrofoil
PostPosted: Tue Oct 01, 2013 9:12 am 
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Bille wrote:
DrLightWind wrote:
C A R A F I N O 2014 wrote:
To be very honest, it is not easy. there is a lot involved. but you can take two windsurf board fins. laminate them together base to base. make is strong. drill holes to attach to your strut. that will be your front wing. do the same for the rear wings. smaller surf board fins. as for the strut. well that one is not easy. but to have money, use something like plastic and cut it in a cnc. hard plastic.

cnc machines are not cheap so if you can shape it by hand your feel tired but still have your cash.

After that, put it together, mount to the board, try it.

Carafino
I think using windsurf board fins and surf board fins are good ideas :thumb:
And a lot of possibilities, when the right adapter is designed to swap foils on the fuselage :idea:
...

DrLW


What's the Longest they make those windsurfer fins ; and
where Ya get them cheapest again ?


Carafino : "... something like plastic and cut it in a cnc. hard plastic."

Use Delrin plastic ? I have a 36" Lathe

Bille


Longest windsurf fins are Formula racing fins - 70cm long.
The fins are usually symmetrical. It would be better to use asymmetrical fins - they make these up to 26.4cm long.
http://www.blackprojectfins.com/product ... ns/type-x/
They are very expensive and even standard windsurf fins are expensive.


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 Post subject: Re: Building a hydrofoil
PostPosted: Tue Oct 01, 2013 10:02 am 
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I just used a titanium sheet, cut it to shape, round off the edges, bend the winglets and voila, a DIY wing. The results are.better than what I expected.


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 Post subject: Re: Building a hydrofoil
PostPosted: Tue Oct 01, 2013 4:57 pm 
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GOD BLESS YOUR HEART BILLIE, THAT IS F CKING AMAZING!

C A R AF I N O WILL GIVE YOU A FREE HYDROFOIL AS SOON AS THEY COME OFF THE PRODUCTION LINE.

KEEP IN CONTACT WITH US.

MANGO CARAFINO


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 Post subject: Re: Building a hydrofoil
PostPosted: Tue Oct 01, 2013 8:32 pm 
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C A R A F I N O 2014 wrote:
GOD BLESS YOUR HEART BILLIE, THAT IS F CKING AMAZING!

C A R AF I N O WILL GIVE YOU A FREE HYDROFOIL AS SOON AS THEY COME OFF THE PRODUCTION LINE.

KEEP IN CONTACT WITH US.

MANGO CARAFINO


OK -- But if you want me to represent YOUR company, then
you will need to agree to letting me EDIT all the posts and
information you present on this or Any other forum BEFORE
you hit the submit button .

We "Won't" be talking about your competition any longer, we let
your creativity and intellect do the Talking from now on ; trust me on
this young man, you got a Bunch of Both !!!

BTW -- did you read this ?
You may want to before agreeing to what Ya said ; i bin accused
of being a bit Wired at times, this article will enplane why :

http://www.thekiteboarder.com/wordpress ... lly-floyd/

Bille


Last edited by Bille on Fri Oct 25, 2013 8:17 pm, edited 2 times in total.

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 Post subject: Re: Building a hydrofoil
PostPosted: Tue Oct 01, 2013 10:29 pm 
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Joined: Wed Jun 12, 2002 1:00 am
Posts: 779
Location: Florida--JACKSONVILLE
You're an amazing man, Mr Billie! I'd like to look you up when I read my motorcycle across country next year or to.


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 Post subject: Re: Building a hydrofoil
PostPosted: Fri Oct 25, 2013 6:59 am 
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Joined: Mon Apr 22, 2013 10:43 pm
Posts: 42
Location: France
Quote:
GOD BLESS YOUR HEART BILLIE, THAT IS F CKING AMAZING!

C A R AF I N O WILL GIVE YOU A FREE HYDROFOIL AS SOON AS THEY COME OFF THE PRODUCTION LINE.

KEEP IN CONTACT WITH US.

MANGO CARAFINO


Before offering a foil, you should give a foil to all the shop that you have diddle.

For memories : http://carafinouk.com/


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 Post subject: Re: Building a hydrofoil
PostPosted: Fri Oct 25, 2013 11:58 am 
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The tail wing seems to be running in the wake of the front wing (like almost all foils).

Is it not very difficult to do development work without a flow tank to study the effect on the rear wing and the effect of altering the angles exactly?

The development of fins on windsurf boards is somewhat of a black art in that they have to actually sail them at the end to say whether one is better or not, but they probably get a lot of very useful design information from flow tank testing before they come up with a design to try on the water.

Its a very interesting project and even for the mast and fuselage, it would be worth it for that alone.


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 Post subject: Re: Building a hydrofoil
PostPosted: Fri Oct 25, 2013 12:53 pm 
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As regards building, using a cnc high density polystyrene core and laying up over it with epoxy resin would be one way to go.

This company supplies HD polystyrene.
You can see that they supply in Dow Surfboard foam at density 2.2 lb/ cu ft

https://www.flyingfoam.com/content/choosing-right-foam

You could choose a symmetrical foil and have the taper you chose, to make the top thicker - for the mast.

There are a range of aerofoils to choose from and you could make the wings tapered, but they only make them as straight tapers.

You can specify wing length, chord and thickness.

https://www.flyingfoam.com/content/what ... ld-i-use-0

https://www.flyingfoam.com/content/quic ... ps-cores-0


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