Fin for SUP

General Discussion
1

Hey Guys

Building my SUP (still)

11’6" x 29 x 4 1/2 Flat bottom round nose.

This is my first SUP and need some help with my fin set up.

This board will be for beginners (me) mainly flat water paddling and mayby some small knee high surfing (once I get the hang of it)

I think I will go with a single fin as I dont think side fins would be of any benifit in flat water.

My question is, what size and shape of fin will I need.

I will be installing a fin box so some tips on box position would also be helpfull

Cheers

2

I just went through this with mine and here is what I found…

Mine is for surfing at 9’4" by 31" by 4". My tail is still pretty wide at 18". I went first with a single, box at 6" up. I put in a 10 inch G and S 'Retro", ton of area on it, 9 inch base. The board surfed well with it but I could pop the fin out easily when up on the nose or close to it. I put in two side fins and though I do feel the drag, no more slide slipping when noseriding and it seems to cutback with more drive. The side fins are standard issue templates from a thruster I had laying around and they are in a typical 2 plus 1 arrangement.

I can still turn the board around on a pivot while paddling-something I had to have.

3

Hey surfinghigh

Thanks for the info.

But this board will be mainly for flat water.

Once I get good enough, I with build myself a SUP around 10’ designed more for surfing.

I will definately go with a 2 + 1 setup for it.

In the mean time I thing just a single will be fine.

I remember this guy told me once.

“as a general rule your fin should be 1 inch per foot of board”

I don’t think I will need an 11 1/2" fin though.

Just need some fin advice.

Cheers

4

http://www.swaylocks.com/forum/gforum.cgi?do=post_view_flat;post=396711;page=1;mh=-1;;sb=post_latest_reply;so=ASC

5

I hear ya, the fins with more area def help with stability when you arent moving, I think Larry has put a small fin up in the middle on a SUP to help out with straight line paddling. I read somewhere too that long base and low height work well.

I went with lots of area just for that reason, to keep the board stable when I am not moving, it really helps. I turn the board mostly from the tail on a pivot and then run up for trim though with its pulled outline, it will carve some from the back third.

Yeah, not even my 10’0" log with massive tail kick would need a 10 inch fin!

Here is the outline of mine…

6

Hey afoaf

Thaks fot the link.

I did read that thread.

Just forgot all about it.

Cheers

7

You gunna use that in the lake??. Would be great in the early morning mate.

8

those long base, low profile fins would be phenomenal for flatwater directional support.

lake paddling is so nice…so much more glide.

9

Hey Mark

Yer, probablly.

I ride my bike to Warilla beach some mornings along the lake.

Looks soo nice from the Windang bridge to the entrance.

Could pull up at the boat ramp, paddle up and down, and you get some small waves off the break water sometimes.

The Farm on those flat to small day also looks good too.

Looking forward to it.

Cheers

Cheers

10

Looks soo nice from the Windang bridge to the entrance.

Just make sure you stay on top of it, we dont want another shark attack!!!.

Make sure you post pics when finished, if you haven’t already mate.

11

Ha ha ha yer I know

Shark attacks are pretty rare, but 2 in the same place???

Well I guess you never know

My board is shaped , spakled and ready for glassing.

Havent taken any photo’s as yet but will do soon.

Cheers

12
Quote:

Hey afoaf

Thaks fot the link.

I did read that thread.

Just forgot all about it.

Cheers

MDS that is my 12 footer that Larry installed the dagger fin in the middle part of the board (10 inches forward of where you would stand or 25.4 cm). Helps a lot for keeping the board tracking in a straight line. It probably adds some lateral stability as well based on the fact that my wife with no experience on a stand up board took it out the other day with swell bumping around in the ocean and only fell off once.

When I get home tonight I will measure the fin box on my board. That should give you an idea for placement, although Larry thought it should probably be a little further forward.

13

Hi mds, Please feel free to check out my SUP Fins blog at www.standupfinsbylarryallison.blogspot.com  I think that blog will answer some of your questions from the reviews my friend. Mahalo,Larry

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