dejavu said..
Here's my take on why the i99 works so well on the Wizard board despite Wyatt Miller stating in his foil wing video that it would only work on boards with a foil mast track located on the bottom of the board -- he forgot about adjusting the sail's mast in its mast track on the deck of the board. Moving the sail's mast back in its track on the deck of the board by three inches, for example, should give similar results to moving the foil's mast forward by three inches in a track located on the bottom of the board.

In CoreAs's video it appears that he has placed the sail's mast at the very back of the mast track on the deck, which, I would think, would provide approximately the same lift from the foil as if he had been able to move the foil's wing further forward via a foil mast track located on the bottom of the board (while leaving the sail's mast in the middle of the deck's mast track, which is where I normally leave it when I foil).

My guess is that if you have a track on the bottom of your board you can adjust lift by moving the foil's wing forward or aft in that track while leaving the mast of your sail in one position in its track located on the deck, or if you only have a Tuttle box, you can adjust the position of your sail's mast in the deck's mast track to approximate the lift you would have obtained by moving the location of the foil's wing using the mast track on the bottom of the board (assuming you have one).

i agree.

For me, without moving straps the 99 needs the following adjustments relative to the 76: foil one inch forward in the track and mast track 3 inches back

Here's a video of Wyatt Miller talking about how to move the centre of lift so one can either get on foil or avoid breaching.

I've found that when I'm on the i76 wing and the wind comes up and I'm overpowered I can get back to shore in one piece if I get out of the foot straps and place my front foot in front of the front foot strap thus allowing me to get more weight forward to keep the foil from constantly breaching. Once back on shore I would rig a smaller sail but perhaps in some instances I could just move the mast forward in the mast track on the deck of the board instead thus saving time and effort by avoiding re-rigging or changing the wing.

My old Mistral windsurf boards had a foot adjustable sliding mast track, which would allow one to adjust the position of the mast while sailing. Something like that could be useful for foiling.

No doubt as I progresses, foiling technique will help but for now when there are big changes in wind strength I need to respond by making changes first to the set up (position of the mast track) and then to wing and sail sizing.

thedoor -- Maybe you should start a thread about the differences between the Wizard and your FS115.

I would like to know what the pluses and minuses are between the two since I'm considering purchasing a FS115 or maybe the FS87.

Any idea what the biggest sail the FS115 can comfortably carry?

Well there's a huge difference between moving your foil and moving your sail. If you are upright, carving through a jibe or downwinding swell with your sail open there's really only the sails weight on the mastfoot, going fullpowered 2 feet in the straps upwind there's loads of weight on the mastfoot. Weight on the foil doesnt change according to what directuon you are going, how fast you are going, how powered up you are, so moving it is less dependent on what you are doing. Just saying.

I dont really move my sail independent of my straps. I have a set distance between my mastfoot and footstraps per sail (for 9.0 its further away than for 3.0), and change both together if I switch foils. If i switch from my freeride to my racefoil underneath my freeride board for example, both my mastfoot and straps go 15cm forward. (Which is about the difference in fuselage in front of the mast)

Plus, Wyatt is one of the best windfoilers in the world, first thing you do is set your mastbase, don't think he plain forgot to change his mastbase position during all of the prototype phase.

A lot of things can work for different people, if it didnt work for him its most probably because he requires his gear to do something different or wants it to feel different during sailing (having the power further forward, being faster, maybe his technique is good enough he doesnt really fly earlier with the i99 compared to the i84, so he only has the drawbacks, etcetc.) and his technique might be very different from someone who likes the in the standard deeptuttle i99 alot! Doesnt mean it cant work for you tho. Just dont think it is optimal for someone of his level if the designer (who is one of the best windfoilers in the world and) who meticulously tested the wing for probably more than a year says its not optimal.

Wyatt talks about setting the mast track at about 42" in front of the front screw, then adjusting from there. The nice thing is being also able to move the footstraps fore and aft, and, or course, moving the front wing fore and aft underneath.

With a tuttle box and foil that has no wing position adjustability, you are stuck with adjusting only footstraps and/or mast track. If your footstraps are in a fixed position (like most formula boards), all ya got left is the mast track.

The 42" starting point is very popular for freeride foiling. See my old youtube here about balancing:

Foilnut said..
Is anyone using the i99 and a 2019 Wizard 125?

Core AC does I believe

excav8ter said..
Is there a chart or something that shows the approximate speed ranges of the different Slingshot foil wings?

There is www.seabreeze.com.au/forums/Kitesurfing/Foiling/Slingshot-76cm-Infinity?page=2 (not sure about the new wings though) but its probably a rough guideline as it's very dependant on skill level, conditions, experience and what type of foiling your looking for.
There are a lot of good foilers on here that have used various slingshot wings in different conditions with different rider weights and could probably give you a better guideline then any standard slingshot chart would.

Not sure why the link from this seabreeze topic isn't working but search slingshot 76 infinity in the kitefoiling forum for the full chart.

michaelpaf said..

excav8ter said..
Is anyone using the i99 in wind speeds above 20mph?

Same question from my side .... :-)

Also short information regarding the 71cm fuselage....Shame on me. When I measured up last time I have not dismounted the front wing...but never guessed that there are still 7 cm additional inside.
Today I dismounted the front Wing and voila....78 cm.....so big sorry for this confusion...but great news for me and my 99 Wing..so the set up should be able to work.

From the last great posts I learned to start at 106cm from the front dtb screw.
For the i99 ti seems to put the mast completely back.
Where do you mount the straps?

Dean in your video it seems the straps are mounted at the most front postiion?
What is the lenght of your wizard 125?

I had again a look to the advantage of the 48 rear wing.....If I have understood it right. Stall speed is a bit lower and some people prefer the 48 more and some the 42. So it would be enough only to switch the front wing from i76 to i99 and enjoy the earlier lift of rount 2 knots less?

Is this corect summarized? Or have I missed some essentiel experiences?

(Setup 125 Wiazrd / 90 KG / 5,6 hybrid or 6,9 gun beat to be tested)

I think that is correct, but I definitely needed to flip the fuse do that there 99 is in the most forward position relative to how I have the 76cm.

I believe core rides his 99 on his wizard in the back position, which I don't I think I would be able to work without moving both my straps way back.

On left side numbers are wrong. This is number for Wizard 150 not 125.

From my understanding the 2018 and 2019/20 are the same size board, the 2019/20 was made with lighter construction.
6' 6" x 31"

Yes 2018 has cutouts

I mostly use the i99 in B position with 42 rear wing (that way if the wind picks up, I can use a smaller front wing without unbolting everything!)

this is my wind/wing gauge for flat water (everyone is different as I foil on freshwater, very little swell or waves) @ 92 kg:

i99 for 5-14 mph
i84 for 10-20 mph
i76 for 17+ mph
TC68 for 25+ mph

Footstraps (this gets complicated):

front strap outer hole is 3 holes back
front strap inner hole is 2 holes back
The reason why is because I didn't like the way my foot and ankle was going to be parallel with the rail, by locating the outer hole 3 back it twists the foot strap so it allows me relax the foot).

Both rear straps 2 holes back (outer row)

Ok motogon & CoreAS, thanks for the clarification,

For reference I setup my 2019 with the same distance 41 1/4" from front mast bolt to CL of mast base. Looks similar

My board weight (straps off) is 8.0 kg/17.6 lbs.

What i'm seeing is that it looks like the i99 would work on the 2019 as well. The ice will be on our lakes until April so no testing until then. ;o(

CoreAS said..this is my wind/wing gauge for flat water (everyone is different as I foil on freshwater, very little swell or waves) @ 92 kg:
i99 for 5-14 mph
i84 for 10-20 mph
i76 for 17+ mph
TC68 for 25+ mph

Dean, do you often get wind over 15 knots?

We used to dig our Time Code 68's but the Infinity 65 is next level fun - faster and crankier (?) turns.
A fraction harder to get going than the 76 in 15 knots but once you're up the acceleration and speed generates heaps of lift
Works fine with the W 125.

Here's the competition to the i99 -- Moses 1100. It's wider but not as deep for a little less area. The i76 looks tiny when the two are put side by side.

moseshydrofoil.com/products/wing-1020-surfwing

Local rider Brad foiling the i99 on the 2020 Freestyle 115 in 9 knots and holes of 6 knots on a 5.6...that's a 5.6!

I was using the i99 on a 5.0/Wizard 125. Bit of Olympic pumping but I foiled in 6 -10 knots (granted we have very flat water).

I forgot my 430 mast that I use on the 5.8, so had no choice. No one thought it was possible to foil in light winds as that with a 5.0
(I weigh 92kg).

If you can pump and get the foil to hook, you can then board pump (like the guys that launch from boat docks etc) and keep the energy going in the foil.

#saynoto9.0

utcminusfour said..

dejavu said..
Here's the competition to the i99 -- Moses 1100. It's wider but not as deep for a little less area. The i76 looks tiny when the two are put side by side.

moseshydrofoil.com/products/wing-1020-surfwing

We need to confirm if this works on the 900 fuselodge. The link you sent states it is compatable with the 710 fuse which will be a bit short for windfoil.

It looks more like the Infinity 84 than the I99 , almost same area .