I'm confused. Does the foil fit into a standard tuttle box, in which case I have an old board, or is it a deep tuttle but needing a spacer?
It goes in a deep tuttle, but needs a spacer (no deep tuttle fin actually fills the gap entirely)
The model we are talking about is a Manta2, can also be ordered with a standard tuttle strut (?)
But you could still use a deep strut in standard box, seen it done here. At least you don't need a spacer then !! 
As in the photos, you could call the foil a medium tuttle (?) and once fitted with the spacer it's quite taller than a deep tuttle.
So there's still plenty of room for the foil to come up in a deep tuttle box if not blocked
Select to expand quoteseanhogan said..
First I have to apologize for my sometimes not technical english (second language... I don't know all the terms, google gave me wedge for spacer 
)
The wooden spacer goes in first (obviously ) then the foil, on my Patrik I have to wiggle it a bit to get it in too.
(it even still sticks out one mm,which is fine with me)
I agree about the tapper part to prevent a normal fin from coming up in the box if over tightened, but you have to consider the extreme force of the foil in action.
It will stretch the tuttle box (it's only plastic with foam around it) if you don't prevent it from going up. We've all heard those "crack sounds" when over tightening a fin, the foil will do worse. 
where's bloody Barn when you need him !!
I'm not trying to prove a point, it happened to me on the hypersonic, it went up and forward !
I ended up with the two bolts sticking out behind my foot 
The local shapers told me that you also have to ensure you original box is connected to both top and bottom of the board, I only have patriks and it's the case, no idea if other brands would have "non connected" boxes. (seems strange they would)
What I did for the hypersonic (as the foil strut had made holes in the box) was to insert the foil (greased and glad wrapped), drill two holes in the deck between the bolt holes, put two straws in the bolt holes, and pour microballon epoxy in the drilled holes to fill the gap. Now it's a perfect fit and there's no way the foil can come up (without ripping the board 
)
Imax, of course you should try, it's such a thrilling sensation !! Plus you can then ditch all those 8.8/9.6 sails and go for a blast in 8 knts !
(but beware it's bloody scary at first !!)
What software did you use to design that spacer Seanhogan?
Select to expand quoteseanhogan said..
I'm fulll on CAD, you just can't do without it !!
Don't you find that it chokes your creative juices. 
Select to expand quoteseanhogan said..
It goes in a deep tuttle, but needs a spacer (no deep tuttle fin actually fills the gap entirely)
The model we are talking about is a Manta2, can also be ordered with a standard tuttle strut (?)
But you could still use a deep strut in standard box, seen it done here. At least you don't need a spacer then !!
As in the photos, you could call the foil a medium tuttle (?) and once fitted with the spacer it's quite taller than a deep tuttle.
So there's still plenty of room for the foil to come up in a deep tuttle box if not blocked
Ok now I'm a bit confused. i have a board with a deep tuttle box. The Manta2 says it fits deep tuttle. I didn't think I needed anything else, but sounds like I need a spacer?
Hi Sputnik11,
In the same boat. My AHD SL2 132 will need a spacer like Sean Hogan hasd drawn, otherwise I could end up splitting the box, not what I want. Hence, have a need for a board repair and will have a spacer made at the same time. Rather have the kit right day one than damage to a good board and possibly losing a foil.
pretty stoked yesterday, second session on the foil :
6.5 no cam
128 patrik sl
7/8 knots max
got it going with a little pumping ! How awesome is that stuff ! Less scary than the first time and managed to keep it flying for a 100 m.
And most importantly : no crash !!
can't wait to get it back on the water
If this spacer thing works......then no need for many to buy a foil board.
That should double or triple its popularity.
I'm thinking of buying a foil to go with my 75 cm wide Manta and my 7m Maui TXi.
Hoping I can get going in 6-7 knots.
I was in Noumea last week but the wind wasn't (and I still want to go back anyway I liked it so much). I was right where Sean's avatar pic is I think and was just floating around on underpowered gear just to get wet. There where a few guys out on 8m+ sails going well.
And then this windsurfer rises out of the water and sails by me completely silent. I let out a "whoa". It looks fully tech man. I want one. It was slalom board with the foil.
Are the foiling kites faster or not? They look faster, like they look really, really fast, but then they don't look to be actually pulling away from a planing windsurfer. Which is faster in 8 knots?
Bugger Panda we didn't even catch up !!!!
Should've sent me a message !
The guy you saw is benjamin tillier, pryde/taroa developer.
Kitefoils are definitely faster than us !be in 8 knots or 20, only above 20 can we see them struggle in the chop while we skim over it.
For example locally the best kitefoiler here does 34 knts Vmax in 12 knts but also 34 knts Vmax in 20 knts....
Select to expand quotescottydog said..
Spacer makes sense, could design one on CAD then 3D print one. 
So just to be 100% clear. If I have a board with a deep tuttle box, and the foil is made for deep tuttle boxes, do I still need a spacer?
Looks like it for me with 30mm to 20mm spacer following the line of the deck and deep tuttle box fin. Will post pics when done. Get on it Sputnik11, nothing ventured, nothing gained.
Select to expand quoteSputnik11 said..
So just to be 100% clear. If I have a board with a deep tuttle box, and the foil is made for deep tuttle boxes, do I still need a spacer?
Yes, there will always be a gap at the top that has to be filled.
Select to expand quoteseanhogan said..Sputnik11 said..
So just to be 100% clear. If I have a board with a deep tuttle box, and the foil is made for deep tuttle boxes, do I still need a spacer?
Yes, there will always be a gap at the top that has to be filled.
OK thanks. They should make that clear when selling them, or make them fit the fin box.
Do any shops sell spacers or will I need to make my own?
You'll have to make your own, if you're not too much in a hurry I got a mate to make some cnc machined ones in commacel.
Will be able to post it to you if you want one.
I'm sure most boards available at moment were not designed with foiling in mind. And with normal fins the gap is no issue.
It will be interesting to see what board manufacturers and designers come up with and how quick.
Select to expand quotesnides8 said..
Horue's solution works, no need for spacers
Nice idea, mabee also one at the front ?
There would be a lot of pressure from that plate to brass insert.
What about a full length plate from front to back with L shaped brackets screwed into the foil shaft. Wouldn't matter if its a bit ugly ,( un hydrodynamic ) , ( is that even the right word ? ) , its out of the water.
The manufacturers could make that pretty.
with all this discussion about spacers, etc ...
1) should we be asking for a DEEP tuttle instead ??
2) should be using spacers for tuttle in deep tuttle box for our windsurf fins - not heard of issues to date, but MUCH less stress than long foil ...
and yes, i had heard there are speed limitations on foils - that is why i am so curious when i hear someone was trying to do speed windsurfing on one !!!
Select to expand quoteseanhogan said..
You'll have to make your own, if you're not too much in a hurry I got a mate to make some cnc machined ones in commacel.
Will be able to post it to you if you want one.
Awesome - will PM you. Happy to pay for the spacer, postage, handling, advice.....
Sailed today in 8-14 knots,averaging 10 knots with a 7.5m / 115 / 44 fin.
Not much fun,though I did get going around a quarter of the time.
Two hydrofoil kitesurfers were out never off the plane,one of them looked fully powered up sailing all over the river.
Thinking a lighter sail and rig is more important with a hydrofoil as it gets its power mostly from fin lift.
ahd foil clinic QandA streamed on facebook.
not sure how to post direct links
runs for 40+ minutes
www.iwindsurf.com/forums/viewtopic.php?t=31858
cheers Jeff
