Moses SABfoil

[grigorib]

guys, I need a stabilizer for the front wing 637. the stock one is the 420, but I wonder if there's better. for now I can't find any used, 420-421-425 ... umhhh

I’m getting my 421 on Tuesday. Will share comparison to 420/425

[dave1986]

guys, I need a stabilizer for the front wing 637. the stock one is the 420, but I wonder if there's better. for now I can't find any used, 420-421-425 ... umhhh

Did you find one?

[grandeand]

guys, I need a stabilizer for the front wing 637. the stock one is the 420, but I wonder if there's better. for now I can't find any used, 420-421-425 ... umhhh

Did you find one?

No, a 421 but a little expensive with the shipping costs. no 425 or 420.

[grigorib]

So I put 420 and 421 side by side and they don’t look identical.
The outline is identical but there are two very clear differences you can see:
- convex upper surface of 421 compared to S-profile semi-concave of 420
- a bit of built-in shim in 420 which would point it more up compared to 421. The “shim” is more visible because of concave surface, yet I believe that without that shim the 421 pushes more down.

[Wazza Foil]

Grigorib are you saying that as the 421 pushes down more then more lift?
With the W1000 and 1100 I do not need more lift for Windwing.
I have just tried the 400 stabiliser with these 2 front wings and the difference is not much up to 30kph compared to the 420. If anything the 400 is a little smoother and possibly faster average speed.
With the W1000 and the 420 I get whistling at 23/24 kph and the 400 at 25/26 kph, very entertaining.

[grigorib]

Grigorib are you saying that as the 421 pushes down more then more lift?
..

When stabilizer pushes more down it takes more front foot pressure or stance needs to move forward and vice versa.
It might feel like the wing has more lift but it’s only matter of stance.

[Peter_Frank]

Grigorib are you saying that as the 421 pushes down more then more lift?
..

When stabilizer pushes more down it takes more front foot pressure or stance needs to move forward and vice versa.
It might feel like the wing has more lift but it’s only matter of stance.

Correct, if you get a bigger stab, or it is adjusted so more lift down (pushes down), it will change the balance point, so you have to stand further further forward for balance.

If a lot, it will also give a more difficult foil to control at higher speeds, as it does not ride as level at different speeds anymore.

As grigorib writes, it might feel like more lift, but it is the same, well actually you got a tad less overall lift on your hydrofoil if stab pushes more down, but hardly noticeable.

Peter

[Wazza Foil]

My 420 has different graphics so wondering if anything else is different in shape, see photo.
In this photo the 400 is underneath.

[tkaraszewski]

My 420 has different graphics so wondering if anything else is different in shape, see photo.
In this photo the 400 is underneath.

Moses and slingshot put different graphics in the same wings. The orange paint is a slingshot part, but they’re identical except for graphics.

[grigorib]

My 420 has different graphics so wondering if anything else is different in shape, see photo.
In this photo the 400 is underneath.

Mine is Slingshot branded one. Same product