Armstrong HA (High Aspect) HA680 hydrofoil front wing: 680 cm², 828 mm span, aspect ratio 10.00, with its closest equivalents from other brands within ±5% area and ±8% aspect ratio. Figures from Armstrong'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 | Flash Front Wing 680 | 680 | +0.0% | 9.80 | -2.0% | 815 | C4 High aspect |
| GONG | Ypra Race V3 670 cm² | 670 | -1.5% | 9.90 | -1.0% | 820 | C4 High aspect |
| Omen | Agent 700 Agent 700 | 700 | +2.9% | 10.10 | +1.0% | 843 | C4 High aspect |
| F-One | EAGLE HM Carbon EAGLE 690 | 690 | +1.5% | 9.70 | -3.0% | 820 | C4 High aspect |
| Axis | ART v2 ART v2 819 | 647 | -4.9% | 9.98 | -0.2% | 820 | C4 High aspect |
| North | Sonar HA650 HA650 | 650 | -4.4% | 10.10 | +1.0% | 810 | C4 High aspect |
| KT Foiling | Atlas 680 Atlas 680 | 680 | +0.0% | 10.60 | +6.0% | 850 | C4 High aspect |
| Naish | Mach-2 Front Wing Mach-2 711 | 711 | +4.6% | 10.16 | +1.6% | 850 | C4 High aspect |
| AFS | Pure Fuselink Foil (monobloc front wing + fuselage) Pure 700 | 700 | +2.9% | 9.60 | -4.0% | 820 | C4 High aspect |
| Duotone | Crest D/LAB 675 | 675 | -0.7% | 9.30 | -7.0% | 790 | C3 Mid aspect |
| North | Sonar SF680 SF680 | 680 | +0.0% | 9.20 | -8.0% | 790 | C3 Mid aspect |
| Cabrinha | Fusion H-Series MkII H700 | 700 | +2.9% | 9.49 | -5.1% | 815 | C3 Mid aspect |
| Takoon | Flow Front Wing 700 | 700 | +2.9% | 10.70 | +7.0% | 865 | C4 High aspect |
| Family | HA |
|---|---|
| Size | HA680 |
| Area, cm² | 680 |
| Area basis | unknown |
| Span, mm | 828 |
| Chord, mm | — |
| Aspect ratio | 10.00 |
| Band | C4 High aspect |
| Brand files it under | Glide / high aspect |
| Disciplines | prone, wing, downwind |
| Construction | carbon |
| Model year | 2025-2026 |
| 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 Armstrong 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.