HELP fin placement / setup on semi-gun / mini-gun

What are your recommendations for the fin placement, cant and toe-in for the following combination of variables ?

the board:

7.0 * 17 7/8 * 21/4 , Reverse VEE, tail is almost pin with a little swallow in it… wide point 2" forward, rocker: quite a bit, shaped for Australian waves… pointy nose, an all-over needle like board… thin rails…

the waves:

6-10 foot French waves on reefs and sand beaches

the fin system:

FCS - GPR Carbon, G_2, G-7…

the surfer:

158-162 lbs, ++12 years experience, owned and surfed 20 surfboards, very different shapes, very different surfing conditions up to 13 foot, guy is ini good condition, has good surfing ability, want to attack the waves with more aggression than before, the fin system feels very stiff…

Thanks

fins at 4 and 12 inches

toed 3/16"

canted 4 degrees

Thanks for taking the time to write your answer, you must be a very busy man…

Hi Blakestah,

Two last questions:

1. Is the angle of cant measured from the shaped bottom - bottom contours included?

2. How far from the EDGE of the board to the Front of the finBASE?! or the end of the finBASE?

the measurement right now is 1 1/2" on the left fin, and 1 1/4" on the right fin…from the back to the exterior of the rail…

Thanks,

Wouter

  1. from the plane of the bottom of the board and from the bottom contours gives different results…for a lot of vee it would change the angle by over 2 degrees. I recommend using the plane of the bottom, and not the shaped bottom.

  2. either 1.5 or 1.25 will work, 1.25 is more standard, you will get a much bigger loss in performance if you go to 1 inch than if you go to 1.75 ie: a little too far out is worse than a little too far in.

there’s heaps in the archives on this too, although for some reason I couldn’t get the search to work yesterday…

Thanks a lot,

Archive searches are good, but take ENORMOUS amounts of time. I thinks due to lack of specifications in the “subject” there there are heaps of pages to look at… before you get to the right one…

Since people, me included want things to go rather quickly and hate looking at screens, the archives ususally are second choice…I reckon this could be enhanced somehow, AS WELL as having a drawing tool on Swaylocks, words are so time consuming…

What do you reckon about the drawing tool? something simple…

Cheers,

Learning the make boards takes TIME.

So youre short on time?

Join the club.

The more you read the more you LEARN.

The info here is FREE.

Today’s generation is not “X” or “Y”

its “I.S.”…Immediate Satisfaction…give it to me…its mine…

Maybe you need to search for a complaint department.

I know, I know, you place far more value on YOUR time than on the time of the people helping you.

We may see it differently…

He guys,

Did not mean to be offensive, I really appreciate the feedback.

Have read quite some time on fins, much better understanding than before…

Have tried some speedfins of carbo-ceramic material, and the board is much more responsive now, with the changed fin set-up and different fins…

Blakestah, did you surf the speeedfins ?

Ciao