Got the CAD drawings from Rohan.
There’s some internal and external tweaks to do and then send the file to the 3-D printer.
I like boobs…big and small…you just can’t get the right curve with CAD… If the nipple is 1/32 off does it matter?
Guys…get real…go surfing…find some boobs to play with…the real world does not care about your fins…
Good to hear. Thanks for the tip.
Got the boxes back from the printer, if you’re in Sydney Im getting mine done at Manifester -96991945, contact Chris.
I’ll put some into a longboard and a set into a bodyboard so I can cut them out and move them if needed.
Once I get a handle on the placement I’ll put them into a Shortboard.
has this been posted or tried before? thought it was interesting. any thoughts on how it would perform?
I posted this a while ago. Fins that can pivot. This guy is now on Kickstarter. I have no relation with this guy. I like the idea except that you have to buy the whole board. Seems like it would be easier to sell if he just sold the fin plugs and fins.
https://www.kickstarter.com/projects/one80-surfboards/one80-surfboard-fin-system-a-new-direction
So I’ve been surfing these internal fins / ports or “gills” or whatever and there’s a few easy lessons learnt.
1. There’s a constant jet of water that comes thru the board due to the rising wave face but volume doesn’t equate to grip.
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There’s straight flow that goes along the slot and Angled flow that hits the inside of the port and creates the ‘grip’.
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I’ve added a longer bib or tongue to reduce the straight flow and I’m making an Internal rib to double the intensity.
At last someone moving in another direction. The fools that keep tweaking fins that look like the dorsals fins of a fish (or dolphin) are pissing in the wind. Stoked!
Here is a little something I’ve been working on for a few years. I don’t mean to claim the hoop, or tunnel fin concept as it’s been around since the 60s. Several people including Roy Stewart, Anibel Marquez and Brett (Surffoils) are pursuing their own versions, or at least were at some point in time.
So here is my hoop fin template and a board I had it on for awhile.
I also tried some FCS CRV fins in the same board in the same position and it rode almost exactly the same. I’m convinced that a key aspect of how they (both hoop fins and hooked fins) ride is the release allowed by the curved/foiled outer surface of each fin. In rail to rail transitions, that curve/foil allows the outer fin to break loose much easier than a flatter foiled/more vertically oriented outer fin surface. At the same time that the outer surface is breaking loose, the inner hook is really digging in. It makes for a good combination in my opinion. Connecting the tips to form a hoop or tunnel doesn’t seem to make a huge difference in my own trials.
Les Waddel has been making some nice curved fins. I haven’t talked to him about what he thinks makes them work but he posted some pics in a thread awhile back… http://www.swaylocks.com/groups/too-early-revisit-tunnel-fins
Too bad Roy isn’t around. I’m sure he would have a lot to add to this discussion.
Say…With fins like that, who needs enemas? LOL!
good one! 
Cleanlines, walking down to the beach a month ago to test these anti-fins I thought it could be a disaster but they work well. I thought there would be heaps of paddling drag and they might not do anything but its all good straight out of the box. On really steep waves it slips so Im adding an internal rib to double the grip.
JohnMellor, that veneer and carbon board always gets my attention, do you still have it and ride it ?
It’s of interest that the guys that invented the bonzer three fin board spent all that time and effort producing what is quite a complicate design. Later on Simon Anderson came up with the solution to the problem of designing a three finned surfboard. As far as I can tell the actual configuration of the thruster set-up has changed very little since he first designed it, such was the thruster’s genius.
I bet that back in the bonzer days there were shapers arguing over the finest points of surfboard design and trying all manner of complicated designs, just as there are now. But as it turns out the real leaps in design are generally very simple, and in hindsight so obvious.
Trying out new stuff, be it complicated or simple is fun and a worthwhile exercise. I’m not saying don’t do it. I’m just saying that when the next big thing in fin design actually comes along it’ll probably be quite simple and work so well that nearly everyone will adopt it within a few years.
Fins can be way more than a control surface .
I design mine as planing surfaces , working with the board creating a Lift , Plane and Release effect .
I had to re-read that brett ,
I thought you wrote
’ thanks for the tit "