Imax1 said..
What's with the little squared to the board radius at the front instead of a blended front ?

I am blaming Flexafario for printing a dummy fin file. In truth, the code being used to develop the fin shape still needs quite some refinement. ATM this little problem is easier to fix after manufacturing with a piece of sandpaper than it is to get the code sorted. Hopefully we will get the broken nose bump code sorted soon, and I will also learn not to tempt Flex with immature design ideas.

this is old but best pic showing a near perfect 15 year old iSonic 111 someone threw out with 2 fin cams embedded. Hoping someone will throw out a smaller donor board. PM me if you want to donate board to the cause. Ideally would have camera on either side of fin looking down but with foot straps and fin all in same position is non trivial to do this.

ozzimark said..
The video footage is from that board? It looks like it was meant to have a clear window attached to prevent water from sloshing around inside the camera well.

Footage is from that board (both cameras). Yes, there is clear polycarb window over the rear facing camera held in place with 6 screws. Originally (this test) I tried to keep the camera dry but water slowly seeps in. By keep ing it dry it appears to work great when the fin is in air but as soon as it hits water the angle of refraction makes the fin go out of frame. Thus next test I filled the cavity with water before putting the cover on. Not much footage and water isn't clear but here it another fin filmed with cavity full of the same water sailing in (very salty).

The downward (rear camera) is cut into the tail of the board with a poly carb window to keep the board shape. Remarkably, someone overnight has donated a board which I will do my best to put a camera(s) on side of fin (in position roughly where the circles are in this pic. (unless someone has better idea where to mount a camera)

Edit: Also over night got a test pilot to test fins when conditions are outside my ability. (this need will become apparent in next vid)

Flex2 said..

The downward (rear camera) is cut into the tail of the board with a poly carb window to keep the board shape. Remarkably, someone overnight has donated a board which I will do my best to put a camera(s) on side of fin (in position roughly where the circles are in this pic. (unless someone has better idea where to mount a camera)

Fabulous work peeps. It's always best to keep Flexafario very busy as I fear he is only 30 minutes of twiddling his thumbs away from building a nuclear reactor in his pool.

Forgot the polar plot showing this fin can point upwind. I uploaded the design and print 6 months ago but only the bots have been interested so far.

Probably not practical for anyone to print themselves but the general idea and build concept of the tuttle transfer plate may be of interest to someone to make your own fins. Next fin will combine the Fangulator build technique with the Enterprise design only smaller.

Print here
www.printables.com/model/465667-14cm-annular-weed-fin-for-speed-sailing

Those big Fangys are a beast. I just bash through chop with gay abandon with a heavy foot massive sail and average skill. They don't spin out . Apparently they handle weed also , not that I would know.

Lifting vertically i think
I am used to the 60cm pointer lifting and railing the board. That gets the board up on what feels like an extreme angle at times.
That is with the 60cm fin. With the 66 it went wild one day and definitely the whole board came out so i went in and got the 60.

The fangy is different. As air can be seen under alot of the board and there is evidently no chop to bounce off. I guess it doesn't rail but stays flat and lifts
I don't know, i'm a newbie to this. Whatever it is it is fun.
I'm glad i have it as an option for something different and to go into the shallows where disaster has struck with big fin before.

I guess it is also an option to de-power the board when pointer is too much. Summer seabreeze was here providing abundant testing opportunities but winter seems to have rolled back in now.
Hopefully test it out again soon and apply imax's 'with gay abandon' technique with big sail in stronger winds on flatwater and see what happens.

Imax1 said..
Apparently they handle weed also , not that I would know.

Me niether.
Although any time i smoke mobdog on his big board with the fangy on mine he claims weed on fin.
But there is no weed here.

I would suggest dropping Kato a msg, he has done a lot of km's on a FF28 and is able to tune and trim to perfection. In the meantime, I agree with Decrepit, the mast track has to come back; probably as far as it will go.
The fin itself is designed to give some vertical lift. Board drag at low speeds is substantial, so getting the fin to lift gets the board out of the water sooner. The penalty is fin drag, which becomes more pronounced at high speeds. If the amount of vertical lift is too great, it can be reduced with some mods to the fin. However, in its current form it will give you some practise at the essential skill of 'flying the fin' at lower speeds; so I think if you can get your stance and rig sorted first, that would be of the most benefit.

What's wrong with the top pic ? It looks good.

In my limited newbie knowledge, I believe the board is made to ride with pointer and rail on the leeward side. I get that much. With fangy fin, it is a different world where the board stays flat and goes about the same speed I go with pointer on it. If windsurfing is a drug, then having this fangy fin is another concoction to add and get high AF trying it. I'm stoked to have it.

MobZ said..
In my limited newbie knowledge, I believe the board is made to ride with pointer and rail on the leeward side. I get that much. With fangy fin, it is a different world where the board stays flat and goes about the same speed I go with pointer on it. If windsurfing is a drug, then having this fangy fin is another concoction to add and get high AF trying it. I'm stoked to have it.

PM sent

MobZ said..
I'm not sure what happened here.
From memory, i think maybe wind got under there going into upwind tack, or it was just honking and i was too scared to hook in.
Maybe that was the point i decided to come in and get the fangy.

This is the wind getting under....

I had a go at my first Flexafario, 3D printed resin-infused fin. I followed Flex's instructions, filled it with West Systems resin, with not much of a problem with air bubbles, and all was looking pretty damn good. Popped it on the back verandah to cure. I forgot about it. and it suffered a bit of a hyperthermic curing reaction. Just too damn hot on the back verandah today. And now I know how Flex felt when he vapourised an aluminium fin in his thermonuclear pizza oven.

Ok, advice taken, mast track back. Getting comfortable. Feeling some magic. Thanks.

Here is some footage of me using the FF28 here on the JP SLW 165ltr. 7.4 KA and 8.5 Cheetah.
The orange sail is old footage, before moving mast back. Green blue Ezzy sail is recent and mast all the way back.

But mostly it is just me saying f**k alot. I had no idea i swore so much. Maybe it is the sailor coming out in me. Sorry if the kids hear it or anyone is offended.
I have channeled my inner Spielberg and having alot of fun making vids.

The journey around getting this fin has been a big thing for me.
I did not know that shallow water speed stuff existed before getting it.
It allowed me to get a go at Green Island, i'll never forget that.
And now i have it, although i never planned to go sail anywhere else, i feel i have to take it where it belongs, weedy shallow lakes. Can't wait!

Also, it is not real shallow where i am sailing here, Jimmies Beach nsw. But shallow enough that i did hit with the 60cm pointer and that was bad. FF lets me go there now and not worry so it opens up use for the board.
I'm thinking it will make the big board easier in stronger winds too

So far i go pretty much the same speed with pointer or FF on same kit. About 22kts.
I'll get to work on beating Kato to 40kts with it, maybe in the next life