F-One EAGLE HM Carbon EAGLE 690 hydrofoil front wing: 690 cm², 820 mm span, aspect ratio 9.70, 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 |
|---|---|---|---|---|---|---|---|
| AFS | Pure Fuselink Foil (monobloc front wing + fuselage) Pure 700 | 700 | +1.4% | 9.60 | -1.0% | 820 | C4 High aspect |
| Takoon | Flash Front Wing 680 | 680 | -1.4% | 9.80 | +1.0% | 815 | C4 High aspect |
| Cabrinha | Fusion H-Series MkII H700 | 700 | +1.4% | 9.49 | -2.2% | 815 | C3 Mid aspect |
| Armstrong | HA (High Aspect) HA680 | 680 | -1.4% | 10.00 | +3.1% | 828 | C4 High aspect |
| GONG | Ypra Race V3 670 cm² | 670 | -2.9% | 9.90 | +2.1% | 820 | C4 High aspect |
| Omen | Agent 700 Agent 700 | 700 | +1.4% | 10.10 | +4.1% | 843 | C4 High aspect |
| Duotone | Crest D/LAB 675 | 675 | -2.2% | 9.30 | -4.1% | 790 | C3 Mid aspect |
| Code Foils | S Series Front Wing 720S | 720 | +4.3% | 9.50 | -2.1% | 830 | C3 Mid aspect |
| ENSIS | FLOW ACE Front Wing 720 | 720 | +4.3% | 9.50 | -2.1% | 827 | C3 Mid aspect |
| North | Sonar SF680 SF680 | 680 | -1.4% | 9.20 | -5.2% | 790 | C3 Mid aspect |
| Naish | Mach-2 Front Wing Mach-2 711 | 711 | +3.0% | 10.16 | +4.7% | 850 | C4 High aspect |
| Family | Eagle |
|---|---|
| Size | EAGLE 690 |
| Area, cm² | 690 |
| Area basis | unknown |
| Span, mm | 820 |
| Chord, mm | — |
| Aspect ratio | 9.70 |
| Band | C4 High aspect |
| Brand files it under | Downwind |
| Disciplines | downwind, wing, prone, sup |
| 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.