product code: 85004.230093
Features
- Recommended with S215 Stabilizer
- Super low stall speed
- Effortless pumping
- Surf-style turning (smooth rail to rail and surf yaw snap)
- Forgiving and accessible for faster progression
Materials
- Pre-Preg Carbon
- Titanium Screws
Front Wing, Cover, Titanium Screw Pack F (M8x30mm)
Progress faster
The SF-Wings are easy to pump but still manageable to roll from rail to rail. The area-distribution across the span is tuned to the rolling ability of the wing - less area in the tips helps the water to get away.Effortless pumping
The foil is super forgiving on angle of attack change – you can pump aggressively or just do a flicker and you can glide forever. When you’re about to stall, give it one pump, then go on forever again. Because it’s so forgiving, you can take out a much smaller surf wing size than you’d expect (for wing surfing). This is appealing if you’re trying to perfect your turns and wave riding. You’re carrying around a smaller foil which is more responsive.Composed glide
The SF can be compared to a high-aspect wing – only at lower speed. Our Sonar HA wings have a phenomenal glide at a higher speed, but you need to maintain it somehow. Because we love that frictionless sensation of glide so much, we’ve engineered the same glide into the slower speeds SF-Front Wings.Responsive turning
We’ve moved the wings as far back on the fuselage as possible for a better turning response, so you may need to move the mast further forward on the track compared to other North wings. Mounting the front wing closer to the mast reduces your yaw stability, so you can initiate turns more easily.Match with S215 Stabilizer
Because the front wing can operate at such a high-angle of attack without stalling, you need a stabilizer that does the same. With smaller front wings, you want to upgrade to a smaller stab, but it’s important to match the stall speed. The S215 was created with lower stall speed to complement that of the SF front wings.Progress faster
Moderate anhedral rondure combines with a gentle back-swept plan shape combine to create a good balance of roll stability, for confidence during pumping and take-offs, and manoeuvrability, for initiating turns with ease.
Effortless pumping
To maintain an efficient window of operation at the lowest pumping speed, we needed to generate more lift out of the foil section. We always try to balance drag vs lift – so to find that compromise here, we shifted the the peak in the lift-to-drag ratio to the lower end of the speed range. Having more profile thickness and curvature in the front section of the profile makes it less sensitive to angle of attack changes. At the opposite end the HA Wings have a flatter section at the front, which makes it more sensitive to angle of attack changes. They are high speed, but easier to stall.
Composed glide
Responsive turning
Match with S215 Stabilizer
BEHIND THE DESIGN
SONAR SF SERIES
Discover what low-speed glide and surf-style performance bring to your ride with North Foil Designer Uli Sommerlatt and Brand Director Mike Raper.
PRONE FOIL SETUP