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Twin fin sailboards
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U2U2U2



Joined: 06 Jul 2001
Posts: 4046
Location: Shipsterns Bluff, Tasmania. Colorado

PostPosted: Sun Sep 15, 2013 1:31 pm    Post subject: Reply with quote

I think to install a pair of boxes to make this board a twin is not the best option. a 2+1 using the tuttle that's there and the addition of small surf boxes
is a better option, to keep weight down and make things simple.

The first thing I WOULD suggest is too try is a weed or shallow water fin

from my own POV it would be on the operating table with a router in hand

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U2U2U2



Joined: 06 Jul 2001
Posts: 4046
Location: Shipsterns Bluff, Tasmania. Colorado

PostPosted: Sun Sep 15, 2013 6:23 pm    Post subject: Reply with quote

when using toe AND asymmetrical fin, you decrease some of the drag, if you stay small on the side fins, it doesn't matter so much, but if you increase the size, then it will, also as close to the rail as possible, 1.5cm to rear center of fin box, you can use smaller fins on the sides
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ittiandro



Joined: 22 Nov 2009
Posts: 167

PostPosted: Sun Sep 11, 2016 1:17 pm    Post subject: Reply with quote

I have a Bic WindSup 11’6. It works very well in light-winds subplaning and even better after I replaced the standard Dolphin rear fin with a longer weed fin.
I was wondering if adding two 10 cm side- thrusters would add extra lift, increase speed and eventually help planing.
I usually sail in light to moderate winds ( 15-18 knts ).
My stock sail is an old 6.2 N.P. Garda. Properly outhauled, this sail allows a good wind range. I also have a smaller Sailworks 5.6 for stronger winds approaching 18 knts, but I seldom use it

Thanks

Ittiandro
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rollerrider



Joined: 17 May 2003
Posts: 68

PostPosted: Sun Sep 11, 2016 5:58 pm    Post subject: Reply with quote

Sailing across a reef on a formula board that requires large fins is a bad idea. Get a smaller board that uses smaller fins.
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joethewindsufa



Joined: 10 Oct 2010
Posts: 669
Location: Montréal

PostPosted: Sun Sep 11, 2016 7:37 pm    Post subject: Reply with quote

check out what someone did with a Formula board !!



i was considering doing same with my JP SLW, but instead discovered Wolfgang Lessacher weed fin !!
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ittiandro



Joined: 22 Nov 2009
Posts: 167

PostPosted: Mon Sep 12, 2016 8:39 am    Post subject: Reply with quote

joethewindsufa wrote:
check out what someone did with a Formula board !!



i was considering doing same with my JP SLW, but instead discovered Wolfgang Lessacher weed fin !!


You must be joking! There must be quite some weed there! Maybe this board should be called more appropriately a “ weedsurfer”…
No , I was thinking of some less intrusive side-fins, not fins on steroids…

Ittiandro
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gvogelsang



Joined: 09 Nov 1988
Posts: 326

PostPosted: Mon Sep 12, 2016 10:30 am    Post subject: Reply with quote

This might be just what you need:

http://www.blackprojectfins.com/windsurf-fins/windsurf-fins/freedelta-re-ultra-short-freeride-for-shallow-water/

Black Project Delta fin - designed for shallow water locations.
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U2U2U2



Joined: 06 Jul 2001
Posts: 4046
Location: Shipsterns Bluff, Tasmania. Colorado

PostPosted: Wed Sep 14, 2016 11:00 pm    Post subject: Reply with quote

ittiandro wrote:
I have a Bic WindSup 11’6. It works very well in light-winds subplaning and even better after I replaced the standard Dolphin rear fin with a longer weed fin.
I was wondering if adding two 10 cm side- thrusters would add extra lift, increase speed and eventually help planing.
I usually sail in light to moderate winds ( 15-18 knts ).
My stock sail is an old 6.2 N.P. Garda. Properly outhauled, this sail allows a good wind range. I also have a smaller Sailworks 5.6 for stronger winds approaching 18 knts, but I seldom use it

Thanks

Ittiandro



MUF Ride 25cm, FCS H3 mediums, brilliant, Bic Sup 9'6"

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