Heard people set up diff lift angles/spacers for different angles and control/speed
What best for slalom (mixing with mast base pos)
Then windward leeward?
Because i heard mast base back/more lift is better upwind
Then less lift downwind/mast base forward is faster?
Then finally finding a happy medium for windward leeward

Want to give this thread some love, I don't really know but my guess racers adjust their settings/kit for reaching versus upwind/downwind. but this is more probably fuselage length and front wing size ?

I think people move the mast track around as wind speed changes, not sure if they change.

People shim their stabilizers and masts to find the ideal balance point, not sure if they adjust shims for reaching versus beating, my guess is no.

Eitherway, the only thing obvioulsy you can adjust on the water is your mast track, so as you said its more about finding that middle ground.

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Roy1000 said..
Heard people set up diff lift angles/spacers for different angles and control/speed
What best for slalom (mixing with mast base pos)
Then windward leeward?
Because i heard mast base back/more lift is better upwind
Then less lift downwind/mast base forward is faster?
Then finally finding a happy medium for windward leeward

I windsurf not windfoil. The force from the sail is transferred to the board through your feet and mast foot. The further forward the mast foot is the more the sideways force will lever around the mast and push the mast downwind. Well, that's my logic anyway.
From winging, and guess same for windfoil, as you go faster the Angle of Attack (AoA) of the front foil decreases (or you would get too much lift) which increases AoA of stabliser and it's drag. You can shim stab to decrease drag but makes set-up less pitch stable, or buy another set-up.

No racer here, just freeride. I'm more of a set it and forget it rider, but.. took me a while to get there . During the learing curve, did a lot of adjustments with everything. Mast base, uj base, footstrap position, shims etc. The shims were just compensating for an out of balace set up. Once I got the balance figured out, no shims needed. They also seem to create more drag (for me).
I also sail hard upwind and downwind. Seems most folks where I'm at just reach back and forth (except for the one IQ foil guy).

I adjust mast base to balance with foil in DT foil box, and never change it. I use 1 shim on my stabilizer (AFS W95 foil) and never change it for 3 different wings covering winds from 8-30 knots, and going upwind, crosswind, and downwind. Without the 1 shim, the foil is very neutral and wants to stay on the water, and is not very responsive to rear foot pressure. 2 shims and it is more sensitive to rear foot pressure, but that only makes breaching more likely.

Sand, are you shimming your 1 or 2 shims for more lift or less lift. AFS provides both. I have both, but have not used them yet. I suspect I will use 1 or 2 front screw shims to increase the lift for the F800 (now F1080) wing.

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segler said..
Sand, are you shimming your 1 or 2 shims for more lift or less lift. AFS provides both. I have both, but have not used them yet. I suspect I will use 1 or 2 front screw shims to increase the lift for the F800 (now F1080) wing.

More lift, put under front stab screw. Now that is on a Goya Bolt 135 with the foil box in the normal position for a fin.

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Sandman1221 said..

segler said..
Sand, are you shimming your 1 or 2 shims for more lift or less lift. AFS provides both. I have both, but have not used them yet. I suspect I will use 1 or 2 front screw shims to increase the lift for the F800 (now F1080) wing.

More lift, put under front stab screw. Now that is on a Goya Bolt 135 with the foil box in the normal position for a fin.

Boy, maybe the board affects the foil AOA? Adding the 1 AFS shim was remarkable for me on the Bolt, board comes up so easily with the touch of the back foot in light wind, powered up just hook in and take off!

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Roy1000 said..
Heard people set up diff lift angles/spacers for different angles and control/speed
What best for slalom (mixing with mast base pos)
Then windward leeward?
Because i heard mast base back/more lift is better upwind
Then less lift downwind/mast base forward is faster?
Then finally finding a happy medium for windward leeward

To the original question, is probably worth investigating berowne's collection of threads: www.seabreeze.com.au/forums/Windsurfing/Foiling/Foil-Racing-Index-of-All-Technique-Threads

Mast base and shim helps some. To get better upwind angles, especially in light wind, people will add shim for lift and move the mast base back. However this is very difficult to manage in higher winds for mortals like me. They will run similarly in light wind slalom too.

To really go upwind/downwind you want a longer fuse with a wing more forward like the 115+. It makes a huge difference compared to freeride foils with shorter fuses. For slalom, it seems like a lot of people converge on something close to the 105+ fuse, different manufacturers have different measurements but I think they trend generally to keep the front wing further back than for upwind/downwind, but with some extra length behind the foil mast to add stability. For example, I notice a huge difference im the 95+ and 105+ just due to the extra arm on the stabilizer. It will, however, change the sweet spot that you'll want to sail in for speed. Reaching with the same gear in the same conditions except with only the fuselage having the front wing back is way more manageable in all but really light wind.

The fastest guys have been playing around with these settings a lot, and it helps a lot to have common gear, or at least have a connection with someone who has a similar setup to what you are using.

Big issue with shimming for lift to get upwind is you absolutely have to keep the hammer down off the wind.

This thread would be more abt iq setup (900 front wing , i think 225 back wing, unsure abt fuselarge length i think 115)
But how do you find a happy medium?
Between fast upwind and fast downwind?
Thanks for all the replies so far they are ****ing amazing!

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Roy1000 said..
This thread would be more abt iq setup (900 front wing , i think 225 back wing, unsure abt fuselarge length i think 115)
But how do you find a happy medium?
Between fast upwind and fast downwind?
Thanks for all the replies so far they are ****ing amazing!

If I'm on the 115+ and the wind is too strong to reach comfortably, I can go very deep downwind until I lose mast base pressure and stability and then carve up more to a broad reach where it's a little faster. Others are way better than me and can hunt the angle to get max speed.
Otherwise in light wind just send it, or in higher wind a 105+ will enable fast reaching