SAB Medusa 869 front foot pressure

10 months ago
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yannicks
yannicks
3 posts
3 posts
10 Aug 2025 8:13pm
I just moved from a sabfoil 899 to a 869 but even with the mast completely to the front and maximum shims on the 376 stab i cannot get enough front foot pressure. I tried it on both my inflateble boards from RRD (90L) and Gong Diamond (95L). I'm on a f700hs fuselage.

Any tips of what i could try next?
Eugenius 2.0
Eugenius 2.0
42 posts
42 posts
10 Aug 2025 8:24pm
The owner of the shop where I bought my Blaz Pro wings gave me a 376 stabilizer.
It was terrible when I tried it. I couldn't get it to work at all. I've also let a few colleagues try it, and they all had the same result.
thedoor
thedoor
2506 posts
2506 posts
11 Aug 2025 12:40pm
yannicks said..
I just moved from a sabfoil 899 to a 869 but even with the mast completely to the front and maximum shims on the 376 stab i cannot get enough front foot pressure. I tried it on both my inflateble boards from RRD (90L) and Gong Diamond (95L). I'm on a f700hs fuselage.

Any tips of what i could try next?



same stab? I founnd the 899 and 909 (edit) to have about the same FFP
yannicks
yannicks
3 posts
3 posts
11 Aug 2025 6:44pm
Nope for the 899 I use my old S483 stab that came with my w1100
Roy
Roy
VIC
153 posts
Roy Roy
VIC, 153 posts
11 Aug 2025 9:04pm
On the WinDfoil, I use the 869 Medusa pro with the 370 stabiliser & 1.5 deg shim (903 fuselage). I have this set-up very dialled in and use it from 15 to 30knots. I don't notice any issues with lack of front foot pressure.

On the Wingfoil, I use the 869 Medusa pro usually with the 425 stabiliser & no shim (663 fuselage). Im a beginner / intermediate winger, so I found the bigger stabiliser helps get me up on foil. So one recommendation is to use a bigger stabiliser.

Also the 899 will definitely take-off earlier and easier than the 869. If you look on the Sabfoil website, 899 takeoff speed is 10-12knots, whereas the 869 is 13-15knts. So other option is more speed / power?
yannicks
yannicks
3 posts
3 posts
11 Aug 2025 7:17pm
thanks I'll try to find another stab to test if that changes the pitch issue. I assumed it was because of the position of the front-wing being too much to the back (it starts about 2cm more to the back), or the f700hs fuselage not being compatible with the smaller front-wing, but let's see if this works.
thedoor
thedoor
2506 posts
2506 posts
17 Aug 2025 2:16am
yannicks said..
Nope for the 899 I use my old S483 stab that came with my w1100


Shim the new stab would be a good start i think, or move to a bigger stab
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