QS ALLROUND
The most versatile fin in the catalog. A single patch of tubercles on the leading edge for improved control without compromising speed. The perfect balance between maneuverability and efficiency. +54% lift vs FCS M-5.
ALLROUND
vs FCS M-5
Direct comparison against the market reference fin. Same simulation conditions: real seawater, 7.5 m/s, 4 angles of attack. A single patch of leading-edge tubercles is enough to beat the reference lift by +53–56%.
| Metric | ALLROUND | FCS M-5 | Improvement |
|---|---|---|---|
| Sustained lift | 199.0 N | 129.3 N | +54% |
| Sustained L/D | 5.00 | 4.48 | +12% |
| Max L/D | 9.10 | 8.06 | +13% |
Specifications
Dimensions and materials
Available sizes
| Size | Base | Height | Volume | Weight |
|---|---|---|---|---|
| S | 525 mm | 536.5 mm | 236.5 cm`u{00b3} | 90 g |
| M | 540 mm | 555.4 mm | 295.9 cm`u{00b3} | 116 g |
| L | 550 mm | 555.4 mm | 353.4 cm`u{00b3} | 134 g |
Scaling factor design with thickness adjustments. All sizes maintain biomimetic proportions and curvature parameters.
Biomimetic feature
Light tubercles
A single patch of tubercles on the leading edge, less aggressive than the RADICAL. Better control in turns without penalizing top speed. The most balanced option in the catalog.
4 mm amplitude tubercles with 3 cycles on the leading edge. Inspired by Megaptera novaeangliae pectoral flippers. They delay stall and improve control at high angles of attack without adding significant drag at cruise speed.
Tubercles
Megaptera novaeangliaeAmplitude 4 mm, 3 cycles on the leading edge. They delay stall and improve control in turns. +1.5`u{00b0} increase in stall angle with minimal drag penalty.
Clean profile
Pure designNo serrations or microchannels. The trailing edge and surface remain clean to maximize straight-line speed.
Versatility
All-terrainWorks in small, medium and large waves. The fin you take when you don`u{2019}t know what conditions you`u{2019}ll encounter.
CFD
Validated simulation
k-`u{03c9} SST turbulence, fine mesh (~3M cells), 4 angles of attack. Fluid: real seawater at 7.5 m/s.
| Angle | Lift (N) | Drag (N) | L/D |
|---|---|---|---|
| 5`u{00b0} | 99.07 | 11.00 | 9.00 |
| 10`u{00b0} | 198.62 | 21.13 | 9.40 |
| 15`u{00b0} | 298.00 | 49.01 | 6.08 |
| 20`u{00b0} | 397.50 | 246.47 | 1.61 |
Materials
Versatile manufacturing
Same manufacturing process as the RADICAL, but geometry optimized for versatility. PA-CF with 3K Twill reinforcement and epoxy coating. FCS II system.
Balance
555.4 mm height with NACA 0012 profile. Taller than the SPEED, more contained than the RADICAL. The sweet spot of the catalog.
All-in-one
Tubercles that provide extra control in turns without compromising speed. Works in any wave type and condition.
Universal
For the surfer who wants a single fin that does everything well. The Swiss Army knife of the catalog. Predictable performance in any situation.