North Sonar HA1250 HA1250 hydrofoil front wing: 1,250 cm², 1,120 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 1099 | 1,220 | -2.4% | 10.08 | -0.2% | 1,100 | C4 High aspect |
| GONG | Veloce V3 Atmo XXL | 1,300 | +4.0% | 10.10 | +0.0% | 1,150 | C4 High aspect |
| Takoon | Flow Front Wing 1200 | 1,200 | -4.0% | 10.50 | +4.0% | 1,120 | C4 High aspect |
| GONG | Veloce Free Fly (FF) V3 Atmo XXL | 1,300 | +4.0% | 10.60 | +5.0% | 1,170 | C4 High aspect |
| F-One | EAGLE HM Carbon EAGLE 1290 | 1,290 | +3.2% | 9.50 | -5.9% | 1,105 | C3 Mid aspect |
| Code Foils | S Series Front Wing 1300S | 1,300 | +4.0% | 9.50 | -5.9% | 1,115 | C3 Mid aspect |
| F-One | EAGLE HM Carbon EAGLE 1190 | 1,190 | -4.8% | 9.40 | -6.9% | 1,060 | C3 Mid aspect |
| Family | Sonar HA (High Aspect / Speed) |
|---|---|
| Size | HA1250 |
| Area, cm² | 1,250 |
| Area basis | unknown |
| Span, mm | 1,120 |
| 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.