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 Post subject: racing fins
PostPosted: Sun Nov 16, 2008 7:38 pm 
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Joined: Tue Jul 26, 2005 7:54 am
Posts: 390
Now that racing board R&D has settled down a little bit in terms of what type of board works and which doesn't, I think the next point to consider is fins design:

- how many and why? two? four? More than four????
- How deep? any advantage in carrying two 30 cm. salami-chopper-blades?
- How much angle? or... how flat must the board go on the water?
- Curved for the outer face and flat for the inner face, or both curved, or even convexe outer ace and slightly concave inner face?
- Clean, knife-like-cutting fin end or slightly rounder and safer for the rider fin ends?
- How stiff? hard for maximum upwind lift or soft for maximum downwind control?
- Any finbox standard to be set? Future is fine but seems weaker than others and, as it is a thin box, does not allow the fin to be at greater angle than 15º. US Box let's the rider try different fin placements back and forth. Once the fin is in it's optimum place, Mini tuttle seems the best to me.

Let's go technical.
At least where I live it's cold and the racing calendar is far away yet :-)
Let's open a thread about fins, if you think it's worth it.


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 Post subject: Re: racing fins
PostPosted: Mon Nov 17, 2008 11:03 pm 
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Joined: Mon Oct 08, 2007 4:39 am
Posts: 544
Picked up a North Race LTD last week. The mini tuttle fins look nice and solid. No slop and a good stable strong connection. What fin systems are available in a mini tuttle? Looking to get some alternate fins. I figure that I can always add a fin box in front of the two if a 4 fin system proves it self to be the best option.
I'll post the tech specs when I get home.


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 Post subject: Re: racing fins
PostPosted: Tue Nov 18, 2008 4:11 pm 
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Joined: Mon Oct 08, 2007 4:39 am
Posts: 544
Looking at the Race LTD G10 CNC 15 fins it looks like a 22deg cant angle with a 22 deg sweep on the trailing edge and around 33 at the front. The fin is around 6 inches long and 4.5 inches wide. The cord is widest at around 2/5 back from the front. Front edge is roughly eliptical and the trailing edge strait.


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 Post subject: Re: racing fins
PostPosted: Wed Dec 10, 2008 8:49 pm 
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Joined: Wed Oct 05, 2005 6:43 pm
Posts: 672
Location: Sweden
I bought 2 Tarifa Fin Company 25cm race fins with mini-tuttle boxes for my race board project. Tilted 15 degrees (about). Fins have very thin profile.

Going to order 2 more boxes and 2 additional smaller fins and place those boxes somewhere forward. I can remove the fins, or try the big fins forward.


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 Post subject: Re: racing fins
PostPosted: Wed Dec 10, 2008 10:27 pm 
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Joined: Tue Jul 26, 2005 7:54 am
Posts: 390
TFC racing fins:
22 cm, 20º canted fins for the back.
14 cm, 10º canted fins for the front (dunno whether they'll give any extra performance...)
Image


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 Post subject: Re: racing fins
PostPosted: Sat Dec 27, 2008 10:26 am 
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Joined: Thu Jul 29, 2004 12:00 pm
Posts: 183
Location: Paraiba - Brazil
Olha o ideal é voce ter varias quilhas, de 17cm até 24cm em varias angulações de 15° até 25° e de varios Rackes. Eu tenho usado prancha de 4 quilhas, só que na frente é um estabilizador de 10cm. Tenho 2 pranchas de tamanhos diferentes e flutuações diferentes, para vento forte e vento fraco. E o ideal é testar bem para voce conhecer bem seu equipamento e competir, de preferencia em etapas do PKRA onde voce aprenderá muito, tem o circuito Americano que tambem é muito bom. Aqui no Brasil o Race tem crescido muito, principalmente na minha cidade, os 4 melhores do Brasil são daqui. Estamos fabricando pranchas aqui na construção Carbon-Sandwich igual as de windsurf e quilhas em G10, G11 e Carbono.


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 Post subject: Re: racing fins
PostPosted: Wed Jun 03, 2009 1:27 am 
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Joined: Sat Apr 24, 2004 3:17 am
Posts: 6
Location: south america
dos any know where to buy mini tuttle fins


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 Post subject: Re: racing fins
PostPosted: Wed Jun 03, 2009 4:56 pm 
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Joined: Tue Dec 02, 2008 10:59 am
Posts: 6
i had some here for sale
in 20cm and 18 cm with 0 degree
mini power box ca. 9 cm + 8 mm
the boxes in the board should be angular
or you must change the fins
for more info plaese contact me
www.b1-kiteboarding.com


Attachments:
b1 finnen.jpg
b1 finnen.jpg [ 475.47 KIB | Viewed 979 times ]
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 Post subject: Re: racing fins
PostPosted: Thu Jun 04, 2009 12:38 am 
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Joined: Sat Apr 24, 2004 3:17 am
Posts: 6
Location: south america
sorry im looking for mini tutle box i make a mistake .Do you have or know were to buy them
cheers


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