GONG Sirus V3 Atmo L hydrofoil front wing: 1,400 cm², 1,240 mm span, aspect ratio 11.00, with its closest equivalents from other brands within ±5% area and ±8% aspect ratio. Figures from GONG's own published specifications.
Projected and flat area run 3–8% apart. A marked area is one whose brand does not state which it publishes, so a match inside the area tolerance may be comparing unlike figures.
| Brand | Wing | Area cm² | Δ area | Aspect ratio | Δ AR | Span mm | Band |
|---|---|---|---|---|---|---|---|
| North | Sonar DW1400 DW1400 | 1,400 | +0.0% | 11.20 | +1.8% | 1,250 | C4 High aspect |
| KT Foiling | Atlas 1340 Atlas 1340 | 1,340 | -4.3% | 11.10 | +0.9% | 1,220 | C4 High aspect |
| Armstrong | APF (All-round Pump Foil) APF1350 | 1,350 | -3.6% | 10.70 | -2.7% | 1,202 | C4 High aspect |
| RRD | Universal Moonfish Front Wing Y30 1350 | 1,350 | -3.6% | 10.70 | -2.7% | 1,200 | C4 High aspect |
| F-One | JAM HM Carbon JAM 1400 | 1,400 | +0.0% | 10.30 | -6.4% | 1,200 | C4 High aspect |
| Naish | Excalibur HA Front Wing Excalibur 1344 | 1,344 | -4.0% | 10.20 | -7.3% | 1,170 | C4 High aspect |
| Family | Sirus |
|---|---|
| Size | L |
| Area, cm² | 1,400 |
| Area basis | unknown |
| Span, mm | 1,240 |
| Chord, mm | 155 |
| Aspect ratio | 11.00 |
| Band | C4 High aspect |
| Brand files it under | Pump / dock |
| Disciplines | pump, sup, prone, downwind, wing, kite |
| Construction | Team / Carbon HM |
| Model year | 2026 |
| Source | manufacturer |
The brand's published aspect ratio agrees with its own span and area (span² ÷ area) to within 5%, so the figure is confirmed.
See GONG on the plot →Data current to August 2026. Fast Bobby is the researcher, never the reviewer: every figure above is the manufacturer's published claim, converted to comparable units, and nothing here is a riding impression.