Armstrong MA Mk II (Mid Aspect) MA1390 hydrofoil front wing: 1,390 cm², 1,060 mm span, aspect ratio 8.00, 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 |
|---|---|---|---|---|---|---|---|
| F-One | SEVEN SEAS Carbon SEVEN SEAS 1400 | 1,400 | +0.7% | 8.00 | +0.0% | 1,055 | C2 Mid-low aspect |
| Naish | Jet HA Front Wing Jet HA 1440 | 1,440 | +3.6% | 8.00 | +0.0% | 1,070 | C2 Mid-low aspect |
| Duotone | Whizz SLS 1450 | 1,450 | +4.3% | 7.90 | -1.2% | 1,070 | C2 Mid-low aspect |
| ENSIS | INFINITY ACE Front Wing 1390 | 1,390 | +0.0% | 7.50 | -6.2% | 1,020 | C2 Mid-low aspect |
| GONG | Curve H V3 FG XXL | 1,370 | -1.4% | 8.40 | +5.0% | 1,070 | C2 Mid-low aspect |
| Takoon | Flare Front Wing 1400 | 1,400 | +0.7% | 8.60 | +7.5% | 1,100 | C3 Mid aspect |
| Takuma | Kujira II Front Wing Kujira II 1400 | 1,400 | +0.7% | 8.60 | +7.5% | 1,096 | C3 Mid aspect |
| AFS | Evo Front Wing 1450 | 1,450 | +4.3% | 7.60 | -5.0% | 1,040 | C2 Mid-low aspect |
| Axis | HPS (High Performance Speed) HPS 980 | 1,323 | -4.8% | 7.49 | -6.4% | 980 | C2 Mid-low aspect |
| Family | MA Mk II |
|---|---|
| Size | MA1390 |
| Area, cm² | 1,390 |
| Area basis | unknown |
| Span, mm | 1,060 |
| Chord, mm | — |
| Aspect ratio | 8.00 |
| Band | C2 Mid-low aspect |
| Brand files it under | Surf / carve |
| Disciplines | wing, prone |
| 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.