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Race - Foilboard Design

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BraCuru
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Re: Race - Foilboard Design

Postby BraCuru » Fri Jul 25, 2014 11:39 am

Florian,
Check out this topic:
viewtopic.php?f=196&t=2384026
it might help you a bit.
I would recommend to keep the back strap in the centerline of the board and front straps' inner inserts 8-9cm apart. 6 might be not enough.

Bradn
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Re: Race - Foilboard Design

Postby Bradn » Sat Jul 26, 2014 9:41 am

Just drew this up,
1500 x 500
slightly wider tail than most, looking for extra volume for getting going in super light winds.
Attachments
board.jpg
top.jpg
side.jpg

BraCuru
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Posts: 851
Joined: Sat Apr 19, 2008 10:00 pm
Kiting since: 2002
Local Beach: Polish Baltic Coast
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Style: foilboarding
Gear: Cabrinha Apollo Kites, Moses Hydrofoil, BraCuru Boards, 24Surf.pl
Brand Affiliation: Moses HF, Cabrinha
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Re: Race - Foilboard Design

Postby BraCuru » Sat Jul 26, 2014 9:50 am

I would make it 5cm wider.
50cm might be not enough in winds below 8kts (sideshore) or below 10kts (onshore) especially for guys over 85kg.
Some raceboards are 60cm wide. One of my prototypes was so wide but it was too wide for 93cm long foil. However 60cm might be good for foils 100cm+.

Bradn
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Re: Race - Foilboard Design

Postby Bradn » Sat Jul 26, 2014 10:18 am

is there a certain volume to aim for? this is 42L
why the extra width over thickness?
my foil is 1m but may get down to 93cm like yours with deep tuttle box.

Bradn
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Re: Race - Foilboard Design

Postby Bradn » Tue Jul 29, 2014 11:23 am

Re done to 55cm, thoughts?
Attachments
top2.jpg
side2.jpg
iso.jpg
iso2.jpg

BraCuru
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Posts: 851
Joined: Sat Apr 19, 2008 10:00 pm
Kiting since: 2002
Local Beach: Polish Baltic Coast
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Style: foilboarding
Gear: Cabrinha Apollo Kites, Moses Hydrofoil, BraCuru Boards, 24Surf.pl
Brand Affiliation: Moses HF, Cabrinha
Contact:

Re: Race - Foilboard Design

Postby BraCuru » Tue Jul 29, 2014 11:52 am

I would remove sharp rails around the bottom. check out my boards' rails please.

zfennell
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Re: Race - Foilboard Design

Postby zfennell » Tue Jul 29, 2014 1:38 pm

BraCuru wrote:I would remove sharp rails around the bottom. check out my boards' rails please.
BraCuru,
I should have asked in your board thread , but i would be interested to hear your thoughts regarding the large rail bevels seen on the bottom of your foil boards.

thanks,
-bill

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Florian Scharscher
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Re: Race - Foilboard Design

Postby Florian Scharscher » Fri Aug 01, 2014 2:33 am

Thanks everyone for your valuable comments, they are much appreciated!

Here is another sketch with the collected informations for anybody to fall back on when designing your Race board.

@Bradn: Looking good, I think 55cm is the way to go. This version has 43L too.

Regarding the bottom edges I was going for sharp edges on my first board, thinking I need them to "grip" for extra upwind abillity. After I spend the last 10 sessions learning to foil I quickly realised this is not the case, in fact it's producting spray and catches the edge occasionally.

The chamfered edges will prevend this and I believe they are more forgiving on high speed touch downs. An a last note I think the edge grip on a foilboard is not that important as there is not much leeward drift (mast) and it's pivoting point is the tail (mast); correct me if I'm wrong!!!

Whats your experience with fast bottom contours (concave)?
Going to start shaping next week.

Good winds from Perth's late winter.
Flo

Image


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