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Multi fin sizes?

 
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skyking1231



Joined: 10 Jul 2000
Posts: 73

PostPosted: Fri Jun 14, 2013 8:01 am    Post subject: Multi fin sizes? Reply with quote

Anyone know of a link or chart to determine what size fins with sail size? I am just looking for a starting pont. I understand there are a few variables weight, riding style.... Trying to figure out fin setups for my fanatic freewave...so thruster/tri fin setups.
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hilton08



Joined: 02 Apr 2000
Posts: 400

PostPosted: Fri Jun 14, 2013 9:17 am    Post subject: Black Project Fins Reply with quote

Black Project Fins has a pretty thorough chart on their website (for up to 6.0 sails)

http://www.blackprojectfins.com/products/windsurf-fins/mini-epic-the-radical-multi-fin-for-twin-thrusters-quad/

http://www.blackprojectfins.com/products/windsurf-fins/wave-quad/

For Gorge sailing, I like a bigger center fin (than they recommend) to help with straight line tracking. They do recommend sizing up for heavier riders, onshore winds, or non-expert sailors.
The 17.5 center with 10cm thrusters is working great for me with 3.7 and 4.2 sails, but I like a bigger 19.5 center fin with the 4.7.
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U2U2U2



Joined: 06 Jul 2001
Posts: 3081
Location: Shipsterns Bluff, Tasmania. Colorado

PostPosted: Fri Jun 14, 2013 9:22 am    Post subject: Reply with quote

http://www.mauiultrafins.com/MUF7_english/News/Entries/2009/12/28_Why_do_we_need_so_much_fin_area_for_multi-_fin_wave_boards.html



http://www.blackprojectfins.com/products/windsurf-fins/wave-quad/


I would say your board is set up to be a 2+1, smaller sidefins and larger center rear, you can of course try variations to achieve a different feel, as looser more like a twin, with fin size closer to the same length.

when dealing with small side fins remember that 1 cm change will alter things when dealing with 8 or 10cm to start with.

Have you tried this board with the side s blocked off, and sailed single ?
The folks in Hatteras did this. Don't appeal to me.

One of the advantageous of multi fins is they cover a broader range of sail quiver//conditions with just one set of fin.

Your toe in on the sides is 1.09 degree, I would HIGHly recommend to try K4s with 2 degree toe and asymmetrical sides, cheap, light weight, and Graham Ezzy signature, go to ::

http://4boards.co.uk/Windsurf/Fins/K4_Asymmetric_Slot_Box_2%C2%BA_Toe-In

fins will ship at close to the UK pounds figure they show, these are great, and the co 4 boards is too!!

_________________
K4 fins
4Boards....May the fours be with you

http://www.k4fins.com/fins.html
http://4boards.co.uk/
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capetonian



Joined: 11 Aug 2006
Posts: 903
Location: Oahu

PostPosted: Fri Jun 14, 2013 9:59 am    Post subject: Reply with quote

Just to confuse the matter further, I sailed a friends JP Australia 93 L Single Thruster with the original 22 cm center fin and then again when he installed a Black Project 22 cm fin. The Black Project fin felt smaller (was easier to push too hard against the fins) but the board was both faster and better turning / looser on a wave.
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U2U2U2



Joined: 06 Jul 2001
Posts: 3081
Location: Shipsterns Bluff, Tasmania. Colorado

PostPosted: Fri Jun 14, 2013 11:07 am    Post subject: Reply with quote

capetonian wrote:
Just to confuse the matter further, I sailed a friends JP Australia 93 L Single Thruster with the original 22 cm center fin and then again when he installed a Black Project 22 cm fin. The Black Project fin felt smaller (was easier to push too hard against the fins) but the board was both faster and better turning / looser on a wave.


BPF are making some excellent fins with additional all the time.







the Black Project Fins work so very well for me, in single twin quad and tri


_________________
K4 fins
4Boards....May the fours be with you

http://www.k4fins.com/fins.html
http://4boards.co.uk/
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skyking1231



Joined: 10 Jul 2000
Posts: 73

PostPosted: Fri Jun 14, 2013 11:57 am    Post subject: Reply with quote

i sailed the fanatic in the beginning center fin (which was good). But now sailing tri-fin and don't plan on going back. currently i am using a weed fin setup....20cm center an 11cm sides. this was great yesterday with my 4.2. i do have 10cm sides. even though this is weed fins...they seemed better than the mfc 19&11cm fins
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U2U2U2



Joined: 06 Jul 2001
Posts: 3081
Location: Shipsterns Bluff, Tasmania. Colorado

PostPosted: Fri Jun 14, 2013 12:58 pm    Post subject: Reply with quote

I could have some slot box, if you determine waht you want (if any) drop me a PM and will see what I no longer need . I sold my quad that had 4 slots.

next board on the horizon will have US/Mini tuttle, so I am sure I have some excess.

BPF, MUFs or Makani, maybe K4.....

I tried a single fin on my Witchcraft ONCE, never again, always 3.

_________________
K4 fins
4Boards....May the fours be with you

http://www.k4fins.com/fins.html
http://4boards.co.uk/
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