GONG Sirus V3 Atmo XL hydrofoil front wing: 1,691 cm², 1,360 mm span, aspect ratio 10.90, 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 |
|---|---|---|---|---|---|---|---|
| Takoon | Pump Front Wing 1700 | 1,700 | +0.5% | 10.40 | -4.6% | 1,330 | C4 High aspect |
| Axis | PNG V2 PNG V2 1300 | 1,632 | -3.5% | 10.36 | -5.0% | 1,300 | C4 High aspect |
| Duotone | Amp SLS 1750 | 1,750 | +3.5% | 11.70 | +7.3% | 1,433 | C5 Very high aspect |
| Family | Sirus |
|---|---|
| Size | XL |
| Area, cm² | 1,691 |
| Area basis | unknown |
| Span, mm | 1,360 |
| Chord, mm | 170 |
| Aspect ratio | 10.90 |
| Band | C4 High aspect |
| Brand files it under | Pump / dock |
| Disciplines | pump, sup, prone, downwind, wing, kite |
| Construction | Perf / fiberglass |
| 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.