Dimensions FCS H2 medium

General Discussion
1

Hi,

I’m busy with copying the FCS H2 medium. In a PVCfoam/epoxy/carbon,glass construction.

I have already cuted the outline with a picture of the H2 scaled with photoshop to the good dimensions.

But what I cant see on the picture is the thickness of the fin.

Can somebody give me the thickness of the H2 medium? An of the curve if possible.

second question:

Is it best to make the fin in carbon and glass or is it better to make it only in glass for more flex?

In belgium the conditions are little more choppy then were you probably surf, but we have clean days.

So think: I make it in carbon for the clean days and keep my composite fins for de less clean days.

(after this I’ll make more flexible fins too, to try out)

Is this thought good?

Hans

2

And is there anybody who can help me with the second question?

It feel like nobody answers because nobody knows the answer on the first one.

But I’m sure somebody can help me with the second one.

3

I can’t answer your first question because I’m not a thruster rider and have no idea of the fin dimensions. I hope someone out there can.

As for your second question, I’d make both and experiment with both in all conditions. You may be surprised at your ability to adapt to both.

Over the years I’ve found that more goes into making them work than just conditions. I’m guessing a little at Belgian conditions, but the pics and your description give me a reasonable idea.

Apart from conditions, there is also your mood, attitude, temperature and wetsuits etc, body loose or tight, etc.

Find and use what you like, but keep experimenting. Most of all have fun.

4

small dimensions from fusion surf

Side Fin Base 4

Side fin height 4 7/16

Center fin base 4

Center fin height 4 7/16

Medium

Side Fin Base 4

Side fin height 4 3/16 ??? ( I think that is a typo and is 4 7/16)

Center fin base 4

Center fin height 4 5/8

From FCS

y applying this knowledge to our most hydrodynamically advanced fin we created the

H-2 range – Small, Medium and Large.

The H-2 Medium is the original H-2 side fins with

a larger centre fin, making all three fins the same size. This subtle change delivers significantly more control through hard carving turns while perfectly enhancing the speed, drive and responsiveness

of the set up.

The H-2 Large (10000mm2) and the H-2 Small (8000mm2) are scaled up and down versions

of the H-2 Medium (9000mm2).

As a guide:

G-3000 or smaller = H-2 Small

G-3000 to G5 = H-2 Medium

G5-G7000 and larger = H-2 Large

Fine tune your surfing by test driving

Old size H2 {same as new medium?}

sweep: 36.5

side base: 4 3/16" 107mm

side depth: 4 10/16" 118mm

center base: 4 3/16" 107mm

center depth: 4 10/16" 118mm

surface area: 14" - 9000mm

New H2 dimensions from FcS

small 102mm base

small 112 height

area 8000mm2

medium 107mm base

medium 118mm height

area 9000mm2

large 113mm base

large 124mm height

area 10000mm2

toe .5

sweep 36.5

cant 10 degrees

As for thickness, I can only guess and compare from memory. I don’t have the h2s but I’ve felt and fondled them while searching for the mediums. The thickness of the old dimesions seems to be 7 compact disks thick at the thickest point, maybe a little thicker on the middle fin. As a reference for comparing fcs fin tabs are about 5 compact disks thick, if you squeeze 5 cds together it is smaller than the fcs tabs by a cats hair. Simon Anderson side fcs fins are 7compact discs thick at thickest point. Sunny Garcia side fins are 6 compact disks at the thickest point. Sunny middle fin is about 5cds thick. Occys middle fin is about 61/2- 7 cds thick The H2s tips had some flex. Stiff base

I would like to try the large fcs H2s side fins.

Sorry about my caliper, ruler method and lack of.

I am glad I waited for a large set, I thought the old dimesions a little small.

5

I like the CD thickness reference! Maybe you’ve created a new measurement standard?

I didn’t take any measurements but when I checked a set in a shop I did notice that they were very light and stiff - I could not detect any flex at all.

My guess is that they have a foam core with aluminized cloth resin infused inside a mold.

6

Thanks for the answers, I think I’m going to buy some CD’s :slight_smile:

I’ll keep experimenting!