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Topic Review (Newest First)
3rd February 2008 09:04 PM
Lessacher Hallo Eldon! I have to read all days some mails, What fin.????????? Sorry, I work fins.
The most write how many liter the board have. I mail back. For Slalom, Freeride, Speed,
Wave ,Freestyle? The answer lets say is the most time : Freeride.
I mail back: Just for fun? Or with more speed? Okay for fun. How many liter have your
board? How big are your sails? What is your weight? Love you to go down wind, or high
upwind or both? Okay: 130l, 6-9mē sails, your weight is 85kg, you love more down wind.
There my fins are for all water good, I forget the question: flat or chop. At best only one fin. Here I can say : I think my Freeride Duo 39 cm in Carbon should be okay. With only
7mē is 36 cm faster, but only one fin. Upwind are the softer G10 fins better than carbon.
The most forget what box. You see now, so many questions and answers,not so easy and
that was only a part of all it. I forgot weedfins. Where can I read what faster is? A upright
fin, a rake 30° fin, or can it be a weedfin with 45°. At the moment not so easy to say.
But with the help of other friends is all it to make. Wolfgang
2nd February 2008 04:35 PM
kimax
Quote:
Originally Posted by Floyd View Post
Thats nonesense kimax.

You always need a place to start .
x5 adding 3 ; might not be perfect but it certainly gives a (good) starting point especially for people who need to ask.(ie beginners or folk not at extreme of sport)
Poster is not aking what fin to use on his speedboard chasing Antoine;or for his waveboard looping with Mat.He`s asking for general advice !

Using this is never going to put you out with absolutely wrong fin; certainly could listeing to certain folk on here.

Have you even tried it with a few sail sizes ???

Fair enough give your advice but dont deride other people`s.

Calculators DO work .(within reaon and for a GUIDE !!!)
Akuna matata, Floyd, I didn't mean disregard other posts. Calculator is a place to start, but cannot be the only reason for buying. One should always think about particular board/sails/fin. Otherwise e.g. novice might buy freestyle fin for S-type...
2nd February 2008 01:30 AM
steveC Let's not get too attached to the idea about fin length, as it's only part of the picture. It's really aspect ratio that tends to define a fin's outline, and ultimately its length.

Sometimes it's really more meaningful to think about a fin's total area. For example, I have a True Ames 24cm low aspect wave fin that roughly has the same total area as my high aspect Tectonics 34cm Goldwing slalom fin. Although the fins differ in concept and performance potential, I find that they are quite interchangeable on the same board and sail.
1st February 2008 10:49 PM
Unregistered Sail x 5 Plus Fin Sail x 5 Plus Fin
4.0 20 3 23 6.6 33 3 36
4.2 21 3 24 6.8 34 3 37
4.4 22 3 25 7.0 35 3 38
4.6 23 3 26 7.4 37 3 40
5.0 25 3 28 7.6 38 3 41
5.2 26 3 29 7.8 39 3 42
5.4 27 3 30 8.0 40 3 43
5.6 28 3 31 8.2 41 3 44
5.8 29 3 32 8.4 42 3 45
6.0 30 3 33 8.6 43 3 46
6.2 31 3 34 8.8 44 3 47
6.4 32 3 35 9.0 45 3 48

???????
Not far out ????
1st February 2008 10:11 PM
Floyd
They do work.But read post. (And try them)

Thats nonesense kimax.

You always need a place to start .
x5 adding 3 ; might not be perfect but it certainly gives a (good) starting point especially for people who need to ask.(ie beginners or folk not at extreme of sport)
Poster is not aking what fin to use on his speedboard chasing Antoine;or for his waveboard looping with Mat.He`s asking for general advice !

Using this is never going to put you out with absolutely wrong fin; certainly could listeing to certain folk on here.

Have you even tried it with a few sail sizes ???

Fair enough give your advice but dont deride other people`s.

Calculators DO work .(within reaon and for a GUIDE !!!)
1st February 2008 07:29 PM
kimax Forget about calculators, nowadays they don't work. Too many variables affect on this. The best way is to ask in forums providing enough information (board/sails/style/your weight/conditions).
1st February 2008 06:04 PM
Eldon What I understand here, there's no actual right when it comes to choosing a fin. I mean, you just have to try and learn.
Of course you have to choose a length that's in between the boards recomendations and the right type of fin. Then it's just up to the sailor to say if it's good or not.

I'm I totally wrong here ?
1st February 2008 05:52 AM
Jean-Marc Mathematical modeling of gear selection is for sure a very complex issue...I'm a bit skeptical to predict gear selection with a magic mathematical formula. Both calculators shown above were way off the mark for the real world conditions. Fins size for a slalom board is not the same as for a wave board with same sail and wind for the first model (the 110 L volume cutoff has a very distinct outcome between a 65 kg or a 100 kg rider IMHO). Sail range were way too small and fins way too large for the second model in 20-40 knots winds.

a) Example of real world gear selection in 20-25 knots wind with a 5.4 sail, 183 cm x 65 kg rider:
1) HS105, Carve111 or S-Type 93: identical 26 cm slalom fin is fine (30-32 slalom fins cm is way too large).
2) Kombat 86 : 24 cm wave fin is fine (30 cm freeride fin is way too large).
3) Acid 62 : 21.5 cm wave fin underpowered; 21 cm wave fin well powered; 20 cm wave fin overpowered (23-24 cm wave fins is too large).

b) Another example with Kombat 86 and identical 6.9 sail in 12-18 knots wind:
4) outboard and back straps : 30 cm fin is fine for freeriding.
5) inboard and front straps : 23 cm wave onshore fin is fine for wavesailing.

c) 3.6 sail on Acid 62 : I have no power and am sinking in 24 knots wind as predicted by the second model. I need at least 10 knots more to get going on a planing mode (real world wind range 35-40 knots with this combo)...

Cheers !

JM
1st February 2008 04:34 AM
James Good comments above. I have a similar fin-size calculator at this link under the "Fin Size" tab. It's based on the recommendations from True Ames:

http://www.vims.edu/general/sailpadd...Calculator.xls
1st February 2008 03:10 AM
carvesalot http://www.boards.co.uk/equipment/finsize_calc.asp

Some of the fin companys have detailed sail ranges for their fins, others none. The companies taht offer great support are True Ames, GSport, Maui Fin , Select, Tarifa, FinWorks, I like the look of Nik Bakers line and Kevin Prichard has his MFC for sale on his blog at a good price delivered, most of the shops have knowledgeable staff reference size, Gorge Surf Shop, Windance, Big Winds and DELTA Windsurf , all US shops great staff.
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