Fin placement for SUP

General Discussion
1

I’ve just shaped my first SUP, 10 foot X 30 inch, copied old Starboard 10’5" Drive outline and plan shape (had to loose5" though as my foam was short).

I was told 4 fin is great for SUP, now I’m trying to figure placement, other than on the bottom at the back…

2

a big center fin helps a lot to stabilize the board while you’re just standing waiting for waves.  i’m going to put 5 boxes on my next board to keep the options open for different sea state conditions.

3

I like the idea of placing a center box about 6" from the tail to give you a few more options.  For a quad, depending on your tail rocker, I like to place the rear fins about 8" from the tail and the fore fins about 17 to 17.5" from the tail. 

Aloha,

D

 

4

I’ve measured Paddle Surf Hawaii and C4 quad setups.

PSH 16" for front and rears 7 7/8 behind front. C4 was just slightly different. 16" and 8 1/8 behind fronts. Both quads with fins close to rail. About 1 3/8 off rail on both.

Quads really help huge SUPs come alive.

5

do you have a profile picture of the board or an APS pdf?

Would love to see what you came up with. How tall/heavy are you? Wondering about the size SUP I’m planning to build.

 

getting back on topic…

Single fin LBs typically have rounded tail section rails and 2+1’s LBs typically have a hard tail section rail… would a quad SUP work well with the rounded tail section rail that would typically be found on a single fin LB? i.e. I’m wondering about finning my upcoming SUP with probox’s for a quad configuration and putting the single fin center box in, but would a rounded tail section rail work for both configurations?

 

thanks

Have a Gold Medal Day!

–4est

6

I decided to go with 17 1/2 and 8 inches. Now have 5 days under my belt in pretty idillic conditions,1 to 4 feet of swell warm water and no crowds.

Surfing wise so far so good, although it takes some getting used to after a short board!

I’m 6’6" and 205lb, so was thinking perhaps a bit more size could help, probably for chop, but we had a couple of pretty glassy days and the size felt good.

https://swaylocks7stage.s3.us-east-2.amazonaws.com/s3fs-public/sup.JPG