Fred has the patterns in their boxes, the core boxes already joined together and a new pouring funnel, all packed and off to the foundry for the 20 and 24 cm versions.

With the real McCoy hollow fins due in November, I am selling these trial castings. Please note: they are NOT hollow - they are the solid trial casting versions.

www.seabreeze.com.au/Classifieds/Windsurfing-Accessories/~vg53t/2017-Fangyfin-24-And-28.aspx?_page=1&search=kUAz4ywlWw9x4uvKNrfOmw%3D%3D

Beautiful Ross . Great to see a result from your perseverance. Innovation is actively promoted where I work and I reckon this is a brilliant example of seeing something through from whoa to go.
what happens with the box end, will it be dipped in goop to give it a wee bit of give?

They are looking bloody good Fangy, nice work!

fangman said..
Wanted: Crash test dummy with Tuttlebox board to take on the weed here using a hollow 20cm fin.
I tried to take some close ups of the fillet, but mostly just ended up showing that I have a lot more finishing to do. It looks sooo much better without my glasses on

Hmm "crash test" maybe this would be a job for me

I have sent emails out to all those who expressed an interest back at the dawn of time. If you didn't get it, please get in touch. The first production run is already sold out, but if you are interested in the second run, here is the price list.
Please note, due to me running out of money, the 28 will not be available until I have built up some reserves to pay for the bigger hollow box pattern. I have a number of solid 28's if you want to drill them out manually, but be warned this is a big job!



I will endeavour to get some demo's sent to the East Coast once my exams are done and dusted and I have a bit more time on my hands :-)

you can see the shape of the foil fangy

I'm just glad you hit it end grain! Side on could have been a lot more painful

choco said..
Have you tried using them unpolished left with the original out of the mold finish?

No choco not yet. But having spent the last few days grinding and polishing fins, I am liking the idea more and more by the minute! :-)

fangman said..
Quick update: I just sold my boat ,

....drinks on at Fangy's.......

ka43 said..
Awesome job Fangy!!! That's some major undertaking (maybe "undertaking" is the wrong word after your plank splitting exercise) and work right there.
What rake are they and are you looking at doing anything smaller than 20??

Thankyou
The rake is variable. It starts at the board at approx 50degrees and sweeps aft as a shallow ellipse: The longer the fin, the more sweep. The 24cm averages just under 55 degrees over its length. The 20cm is slightly less and the 28 slightly more. The intent was to provide a smallish fin that could handle bigger sails, that is provide as much lift as efficiently as possible, and as a result not be overly concerned with drag or trying to produce a speed fin. The amount of lift the 20 provides is about as low as I can go and keep true to the intent. In my hands and barge-arse weight, it needs to doing planing speeds before it really starts to bite, whereas the 24 bites as soon as its starts moving.
The surface area of the 20 is about the same as a 55 degree rake Delta 16. I cut the 20 down to 18cm and it seemed to be well behaved. I guess you could cut it down to 16cm, but I haven't done any experiments to find out. But that's as small as I am going for now. Methinks any further development is not going to get approval from the Minister for Excessive Windsurfing Expenditure for quite some time yet....

( Wazzadrunkensailor - drinks are on mate if you can get yourself here )

AUS 808 said..

decrepit said..

Stretchy said.. Ross, taking the aluminium skin concept further, could you press 2 halves of the fin into a female mold from say 4mm ally plate, then weld the 2 halves together and fill with foam? Not sure how you would deal with the box end...

The person you need to talk to is Swindy, he's the expert welder amongst us.
I have suggested that idea to him, but my idea was stainless not ally.

Funny you should say that Mike.
When living in the Philippines with no windsurfing shops I decided to make a Stainless Steel fin as I was managing a St St fab shop.
1.2mm thick welded & polished, looked magic
Sailed approximately 10 metres before it folded at the base 90 degrees to the board

Carry on Fangy

I say well done for trying!

"He who makes no mistakes, makes nothing at all"

Thanks Ross, will observe with interest!!.

mmmm shiny!

Looks really good Ross

Questions Mr Fangman:

Have you seen any evidence of corrosive pitting on you oldest fins? Do you anticipate that this could occur? Do you think anodising would be a good idea?

Reason I ask is I have an fantastic aluminium assy speed fin made by Mal Wright way back in the mid 80's and it shows signs of pitting, even though it has been painted with 3d primer paint. I have to get it out every now and then and refinish it to prevent it progressing. It may well be a different grade of alloy of course.