advice on 2+1 Single fin setup.

General Discussion
1

Hello,

   I a'm just about to build a bit of an experiment, it will be a 6' 8" egg single from the 6 8p Clarke.

With 16 1/2 round nose 22 1/2 mid 2 inches back from centre and an 18 round tail. The fin setup will be

8" singlefin with thruster fins to the out side.

I have a 6’ 4" fish thats greatfun, but fancy something a bit unusal, this will be a sort of cheyne horan

type board but with the side runners to use this winter.

Where should I place the fins with this setup, ie 10" box position from the tail and position of the outer fins,

toe in cant etc?

Any other tips would be welcome, always get good advice here. This will be my 11th board this year

and swaylocks has been a great help.

2

G’day Gazro !

[this is only what I do]… I put my side fins sort of in a thruster position. But , with side fin plugs or boxes, you can move them forward or back .

The beauty of a finbox (good choice, mate !!) is that you can do the same with the single / or back fin .

To me , this 2+1 / “widowmaker” setup is ALL about experimentation …trying LOTS of different sized side and back / single fins , so you have a board that you can use in a WIDE range of conditions . I have seen everything from the side fins being level with the “back” fin , to the “normal” thruster placements , and lots of variety in between [depends on if you use longish side fin boxes , or , in my fish’s case , LOTS of side fin plugs] …the choice is YOURS !!

The horrible looking board I posted in the “surfing jokes” thread was SUPPOSED to achieve this , with three fin boxes…[that was 6’5]…It may still happen one day , if it is stripped and reshaped …otherwise it will be my “palette” for experiments [tints , glassing practice, sprays, fin plugging, fin cores , ? skatedeck? …whatever][strike]

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3

Sounds like a cool experiment! I would put the center box 3" up and the side fins at around 12"

Like Chip said, use an adjustable system for your side fins. I think you chose a great blank too…

4

Been using my old Bic 7’9"er as a 6" twin, 6" twin with 3.5 trailer, 4.5 sides and 7" trailer, 8" trailer only, 3.5 sides and 8" trailer, and a few times with a normal 9" log fin.

Like the first best, second in overhead juice, which I have trouble riding the board in…too wide…

5

Thanks for the tips I appreciate it, drawn it onto the blank today.

Also building a 6’5" fish for my mate with another 6 8p, great

paddling rocker in these blanks.

Cheers Gaz

6

Hey LeeDD,

Where are you getting these different size fins for the Bic?

The reason I ask is that the board I first learned to surf on was a 7’9" bic tri fin. I thought I’d never surf. If I paddled in one position the wave would roll right underneath me. If I moved just a little forward the board would pearl. Not until I tried another board and easly caught waves did I realize there was something wrong with the board, and it’s actually how I ended up finding swaylocks. Anyway, my thinking was there was something wrong with the fins so I got a longer fin from a Bic longboard and had to remake the base to fit the small Bic slots and now the board works. But I’ve never seen any other sized fins that fit a Bic.

Funny now I see the newer 7’9" Bics that have a larger center fin -more like a 2+1 set up - instead of the tri-fin setup mine had.