North Sonar HA550 HA550 hydrofoil front wing: 550 cm², 740 mm span, aspect ratio 10.00, 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 |
|---|---|---|---|---|---|---|---|
| AFS | Pure Race 560 Pure Race 560 | 560 | +1.8% | 10.00 | +0.0% | 750 | C4 High aspect |
| Naish | Mach-2 Front Wing Mach-2 560 | 560 | +1.8% | 10.04 | +0.4% | 750 | C4 High aspect |
| GONG | Ypra Race V3 540 cm² | 540 | -1.8% | 9.90 | -1.0% | 730 | C4 High aspect |
| Naish | Excalibur HA Front Wing Excalibur 544 | 544 | -1.1% | 10.20 | +2.0% | 745 | C4 High aspect |
| Cabrinha | Fusion H-Series MkII H550 | 550 | +0.0% | 9.52 | -4.8% | 690 | C4 High aspect |
| Takoon | Flash Front Wing 530 | 530 | -3.6% | 9.80 | -2.0% | 720 | C4 High aspect |
| GONG | Ypra Race Micro V3 Atmo 540 cm² | 540 | -1.8% | 10.40 | +4.0% | 749 | C4 High aspect |
| KT Foiling | Atlas 570 Atlas 570 | 570 | +3.6% | 10.50 | +5.0% | 775 | C4 High aspect |
| Family | Sonar HA (High Aspect / Speed) |
|---|---|
| Size | HA550 |
| Area, cm² | 550 |
| Area basis | unknown |
| Span, mm | 740 |
| Chord, mm | — |
| Aspect ratio | 10.00 |
| 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.