North Sonar HA650 HA650 hydrofoil front wing: 650 cm², 810 mm span, aspect ratio 10.10, with its closest equivalents from other brands within ±5% area and ±8% aspect ratio. Figures from North'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 |
|---|---|---|---|---|---|---|---|
| Axis | ART v2 ART v2 819 | 647 | -0.5% | 9.98 | -1.2% | 820 | C4 High aspect |
| Naish | Jet HA Front Wing Jet HA 640 | 640 | -1.5% | 10.20 | +1.0% | 810 | C4 High aspect |
| Unifoil | Progression 100 Progression 100 | 645 | -0.8% | 10.50 | +4.0% | 824 | C4 High aspect |
| GONG | Ypra Race V3 670 cm² | 670 | +3.1% | 9.90 | -2.0% | 820 | C4 High aspect |
| Armstrong | HA (High Aspect) HA680 | 680 | +4.6% | 10.00 | -1.0% | 828 | C4 High aspect |
| GONG | Ypra Race Micro V3 Atmo 630 cm² | 630 | -3.1% | 10.40 | +3.0% | 809 | C4 High aspect |
| Duotone | Glide 2.0 D/LAB 620 | 620 | -4.6% | 10.30 | +2.0% | 800 | C4 High aspect |
| Axis | Surge Surge 780 | 643 | -1.1% | 9.48 | -6.1% | 780 | C3 Mid aspect |
| Sabfoil | Razor PRO 775 Razor PRO 775 | 631 | -2.9% | 9.64 | -4.6% | 780 | C4 High aspect |
| Takoon | Flash Front Wing 680 | 680 | +4.6% | 9.80 | -3.0% | 815 | C4 High aspect |
| KT Foiling | Atlas 680 Atlas 680 | 680 | +4.6% | 10.60 | +5.0% | 850 | C4 High aspect |
| Duotone | Crest D/LAB 675 | 675 | +3.8% | 9.30 | -7.9% | 790 | C3 Mid aspect |
| Family | Sonar HA (High Aspect / Speed) |
|---|---|
| Size | HA650 |
| Area, cm² | 650 |
| Area basis | unknown |
| Span, mm | 810 |
| Chord, mm | — |
| Aspect ratio | 10.10 |
| Band | C4 High aspect |
| Brand files it under | Glide / high aspect |
| Disciplines | wing, race, kite, prone, tow, downwind |
| Construction | carbon pre-preg |
| 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 North 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.