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smedman

Wakesurfing - Adjustable Fins

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smedman

For my latest project I ordered a high end fin set up - called 4 Way Fin System or 4WFS for short -- website www.4wfs.com -- they are not readily available in the US due to a lousy distributor - but I was able to connect with their main office in Australia and they hooked me up. Well, I shouldn't say hooked me up as these fins don't come cheap (especially factoring shipping from OZ), but they were more than happy to help me get what I needed.

The fin system allows the rider to adjust the fins by

1. moving them forward or backward about 1/2 inch

2. twisting the fins towards or away from the nose (toe-in or splay)

3. adjusting the cant (or lean) by removing the finbox inserts and replacing them with ones that have different cant presets

4. this one shouldn't really count - but "removing and replacing" the fins

for me, i was most interested in discovering and testing adjustments in toe-in and this is the only system that allows the toe-in adjustment

all the materials -- two fiberglass fins (white and red) two composite fins.

the blue fin boxes are at 0 degree cant (lean) and the yellows are at 4 degrees lean

P2160083.jpg

checking out the proposed placement

P4050474.jpg

measuring the alignment for the jigs

P4050479.jpg

the foam jigs have PSA backing so it is best to trace them to make sure that you put them in the right place when sticking them on

P4050478.jpg

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smedman

jigs in place

P4050479.jpg

cutting into the foam and glass -- regardless of how many times i do - it always makes me cringe just a bit -- in this case i used a hole saw that i taped off to ensure the right depth

P4050484.jpg

popping out the glass

P4050487.jpg

routering the rest of the foam out

P4050489.jpg

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smedman

checking fit

P4050490.jpg

the manufacturer recommends removing a thin layer of foam underneath the glass around the edge of the fin boxes so that the resin can seep in an create a stronger bond

P4050492.jpg

everything ready to go --

round patches of fiberglass to go in the holes

foam jigs in place to help catch the excess resin

now just mix up some resin and pour in and put the fin boxes in

P4050493.jpg

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LS-One

I always enjoy looking at your cool stuff !! Thumbup.gif

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smedman

boxes in and check the level

P4050494.jpg

now - it was going to cost about $100 for the "official 4wfs weights" to be mailed from OZ -- so I decided to improvise -- this is to make sure the boxes set level and don't come up when the resin is gelling... ummm ummm good!!!

P4050494.jpg

a few hours later -- peeling away the foam jigs

P4050501.jpg

ready for sanding / grinding down the resin dam/edges that stick out...

P4050502.jpg

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smedman

sander ready with 40grit

P4070504.jpg

almost ground down.... at this point i switch the pad to 80 grit -- i promise it will look better later

P4070507.jpg

almost ready -- just making sure the boxes fit

P4070508.jpg

i decided to go with the 4degree boxes on the front

P4070515.jpg

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smedman

locked and loaded

(i was too anxious to fine sand, buff and polish at this point to make everything all pretty -- just wanted to get it on the water)

P4070516.jpg

if you look closely you can see that I angled the front fin in towards the nose slightly -- that is the beauty of these things - you can adjust it on the fly

P4070518.jpg

"toe in" options

P4070517copy.jpg

ready to roll -- unfortunately the wife didn't get any shots of me riding :Doh: but how can I blame her. we had our 2yr old and 6mo old on the boat as her only passengers. we'll have to get some later this weekend

P4070521.jpg

it was all new for me -- new shape "the wombat" and new fin system.

overall - i really liked how they rode. with the quads it was very fast down the line, but harder to bust loose for lipslides/ tailslides. i took out the back fins and was able to break it loose well on the lip and even get the fins out of the water a bit...

i adjusted the toe-in on the water and brought the fins more parallel to the stringer instead of pointing towards the nose. for the few short runs I had, i seemed to like it better with the them straight on... but i need to play on it more and also try moving the fins forward and back.

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chathamsolutions

Beautiful Smed. Keep 'em coming.

That new form looks solid. Playing with the angles like that will help you set them perfect for retail. Keep tweeking it. That's sweet.

BTW - where'd you get that HUGE SL flag? :)

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sunscapeJeff

GREAT job! Those finboxes look really cool. Too bad their distributor is lousy. Have you thought about being a distributor too? Could be a good opportunity ...

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BLADE

What you think is an SL Flag is actually the strap for the straight line, illusion in the pic i think?

Smed, I would like to ride that board at the Free Ride in May!!

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BB LSV

That is really cool Smed ! Thumbup.gif I love the updates

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smedman

thanks everyone

i cannot tell you how happy I am with this board. super fun!

just got some new fins in for the boxes from the manufacturer in Australia - they are "bonzer" fins -- about 3 inches at base, with 2 inches tall.

i put them on the back of the quad set up and dang this thing came alive!

post-1409-1208789631_thumb.jpg

here's a little vid of my wife's first ride with the new fin set up

th_P4110535.jpg

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Flying Tivo

What brand board and size is it?

Thanks

Felipe

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D-GOOSE
What brand board and size is it?

Thanks

Felipe

Its a Smedman special Thumbup.gif not sure on the size. He has been making all kinds of boards by hand for over a yr (I think) and you can pull up picks of the other board with a quick search. Now I'm just waiting to see when he's going to start selling them to the public Yahoo.gif

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sunscapeJeff
What brand board and size is it?

Thanks

Felipe

If you click on the website in Smedman's signature, I bet you'll find out what brand of board it is ... Thumbup.gif

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Dave08'VLX

That's awesome!!!

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BLADE

He is calling it the "WOMBAT"

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