F-One JAM HM Carbon JAM 1900 hydrofoil front wing: 1,900 cm², 1,400 mm span, aspect ratio 10.50, with its closest equivalents from other brands within ±5% area and ±8% aspect ratio. Figures from F-One'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 1900 | 1,900 | +0.0% | 10.50 | +0.0% | 1,410 | C4 High aspect |
| GONG | Trail V3 Atmo XXL | 1,950 | +2.6% | 10.10 | -3.8% | 1,400 | C4 High aspect |
| GONG | Sirus V3 Atmo XXL | 1,950 | +2.6% | 11.00 | +4.8% | 1,460 | C4 High aspect |
| Sabfoil | Leviathan Blackbird The 1350 Leviathan Blackbird "The 1350" | 1,864 | -1.9% | 9.80 | -6.7% | 1,350 | C4 High aspect |
| Sabfoil | Leviathan 1350 Leviathan 1350 | 1,870 | -1.6% | 9.75 | -7.1% | 1,350 | C4 High aspect |
| Family | Jam |
|---|---|
| Size | JAM 1900 |
| Area, cm² | 1,900 |
| Area basis | unknown |
| Span, mm | 1,400 |
| Chord, mm | — |
| Aspect ratio | 10.50 |
| Band | C4 High aspect |
| Brand files it under | Pump / dock |
| Disciplines | pump, downwind |
| Construction | HM carbon |
| 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 F-One 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.