I have been using the 400 rear stab with my Axis BSC 1120, 1060 and HA1000 foils. Is there another rear stab that I should look at? What affect do the different stabs have over my current one? Would I see some benefits from adding a different rear stab to the mix? I mainly cruise back and forth, and try to ride some swells while flagging the sail a bit.

That looks like the 400 flat speed wing if it working for you stick with it most Axis guys would recommend the progressive stabs latest and greatest ? When I ride my axis setup my front wings are HPS 830&700 I still like the old 370 with the turned up tips.

I don't have a problem with the 400 at all. I guess I started thinking about it and the fact that I have only tried one other stab, and what performance changes a different stab may provide. I have the Anhedral 500, which gives way too much lift when the wind got above 14-16mph. In lighter wind, the Anhedral is nice.

I was surprized how much of a difference wing tips on the stab make. Much looser without but not something i liked on windfoil. But more importantly is the angle of attack of the stab. That has a dramatic impact on riding and seems like different stabs provide different amounts of lift but not something you can determine without trying.

Damn Axis have a lot of stabs to choose from, damn affordable too! Have you tried this one?

axisfoils.com/collections/rear-wings/products/400-freeride-carbon-rear-wing

Yes, the angle of attack of the stab is what the whole universe of comments on shimming is about. Stab shims come with different tapers to increase or decrease the angle of attack. You have to experiment with this. Try different shims until you get what you like.

Shimming is about tuning what speed range has the foil trim with the foot pressure you prefer.
Getting the wing further forward requires less force from the stab to balance the mast base pressure and is lower drag. Plus you will have a much wider range of speeds which maintain similar foot pressure.
Obviously this requires a different fuselage which might not be available for your foil.

When you have the wing position balanced but not enough pressure from the stab you'll notice the foil actually loses front foot pressure as speed builds. For me this is past the point I want to tune for.

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Grantmac said..
Getting the wing further forward requires less force from the stab to balance the mast base pressure and is lower drag. Plus you will have a much wider range of speeds which maintain similar foot pressure.

^^^ Interesting.
What's the advantage of a long neck on the fuse to get the wing forward (with associated twist problems) and keeping the foil mast to the rear of the board.
Windfoil racers must have tested moving the mast forward (like wingers) but found rear-set works best.
Presumably it adds directional stability at speed but how much and is that all?

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azymuth said..

Grantmac said..
Getting the wing further forward requires less force from the stab to balance the mast base pressure and is lower drag. Plus you will have a much wider range of speeds which maintain similar foot pressure.

^^^ Interesting.
What's the advantage of a long neck on the fuse to get the wing forward (with associated twist problems) and keeping the foil mast to the rear of the board.
Windfoil racers must have tested moving the mast forward (like wingers) but found rear-set works best.
Presumably it adds directional stability at speed but how much and is that all?

Wing racers also use fuselages which place the mast further back. Likely adds both directional and pitch stability.

Select to expand quote

Grantmac said..

azymuth said..

Grantmac said..
Getting the wing further forward requires less force from the stab to balance the mast base pressure and is lower drag. Plus you will have a much wider range of speeds which maintain similar foot pressure.

^^^ Interesting.
What's the advantage of a long neck on the fuse to get the wing forward (with associated twist problems) and keeping the foil mast to the rear of the board.
Windfoil racers must have tested moving the mast forward (like wingers) but found rear-set works best.
Presumably it adds directional stability at speed but how much and is that all?

Wing racers also use fuselages which place the mast further back. Likely adds both directional and pitch stability.

Yes, and ROLL predictability too. If the foilmast is too far forward it'll generate too much lift and roll you to leeward and if you yaw at all it'll roll you back and forth. Think of sailing a longboard off the wind with the daggerboard down - nasty.

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thedoor said..
I was surprized how much of a difference wing tips on the stab make. Much looser without but not something i liked on windfoil. But more importantly is the angle of attack of the stab. That has a dramatic impact on riding and seems like different stabs provide different amounts of lift but not something you can determine without trying.

Damn Axis have a lot of stabs to choose from, damn affordable too! Have you tried this one?

axisfoils.com/collections/rear-wings/products/400-freeride-carbon-rear-wing

I have only used the 400 flat speed and the 500 Anhedral. The 500 was a joy in lighter wind, but when it picks up past 16mph, it lifted way too much. I will see if MACKite has a 400 Freeride in stock to try.

I'd look at the 400P