View Full Version : Weedfins for iSonic?

25th April 2008, 04:35 AM
Hi Roger,

Sorry for double posting this but since I know you have in depth knowledge and experiece with weed fins I thought it made sense adressing the topic directly to you.

I have an iS 122 and 101 to be coupled with race sails 8,5 , 7,5 and 6,5. I've realized that I will need a couple of good weed fins since we get moderate amounts of weeds during summer and fall where I live. I'm looking for the market's best fins, what do you recommend and in which sizes? I'm 85 kg and sail costal conditions.


/Andy from Sweden

26th April 2008, 04:32 AM
Hi Andy,
What a lucky guy!
Wolfgang Lessacher is in Germany, and you are close and the transaction
will probably be in euros.
I think what you need is Wolfgang Lessacher's Duo Weed in a 32 and 36.
The 32 will work in the IS 122 with your 8.5 m2 rig....( I used that configuration
extensively when in Bonaire last year and was about the first one to plane in the
very shallow (no fins deepr than 32 cm) Lac Bay waters.
Since you are dealing with weeds rather than shallow water, I'd suggest the 36 cm as
a good early planing alternative on your IS 122.
I used the 32 cm on the IS 101 as well, so if you can only get one, get the 32 cm.
Here's a link:
Wolfgang likes the 28 cm for a 7.5, but I've found it to be a little small to really get the
IS 101 going early.
Maybe better to get the 28 cm for the IS 101 and the 32 cm for the IS 122, and add a
36 cm later if you feel you need it.
Here's another link to Lessacher Design:
Also, you might want to check out the Tangent Dynamics Reapers.
I use them alot when the weeds are light, and for shallow waters here in Cape Hatteras.
Here's a link to Sailworld, but I'm not sure they ship them to Europe.
Hope this helps,

29th April 2008, 04:43 PM
Hi Roger,

Thanks for your reply, highly appreciated with some input on the fairly specialized field of weed fins. Think I will go for the Lessacher fins since Iíve heard only good things about them and due to the fact heís close by. By the way, do you know the reason to why the weed fins arenít made with off set base? Iíve always been taught that off set base is a prerequisite in order to achieve a well performing weed fin.

/ Andy

29th April 2008, 09:17 PM
Hi Klint,
Wolfgang himself may chime in here with some info.
I've worked with him a bit on modifying his designs to set the fin
further forward, but like all the "fin making magicians" he does not
like the overhang because it can cause problems with getting a tight
fit/seal between the overhang and the bottom of the board just in
front of the fin box.
Most sailors do not want to "fit their fins" and unless you use a thick
rubber gasket (a different set of problems) under the overhang, there
is the chance that weeds will get between the overhang and the bottom
of the board and become trapped, so they then cause the same problems
the weed fin is supposed to prevent.
Wolfgang's asymetrical fins do not seem to have the same "rudder effect"
that you find with other high rake angle, not set forward, weed fins.
Give them a try, they are fast, don't change the feel of the board too much,
and shed weeds really well.
You have to get one of Wolfgang's beautiful fins in your hands, and rub/touch
the asymetrical foil to really appreciate his "artistry".
Hope this helps,