Armstrong APF (All-round Pump Foil) APF1880 hydrofoil front wing: 1,880 cm², 1,302 mm span, aspect ratio 9.20, 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 |
|---|---|---|---|---|---|---|---|
| Code Foils | Kanga Series Front Wing 1870 | 1,870 | -0.5% | 9.10 | -1.1% | 1,300 | C3 Mid aspect |
| Takoon | Pump One Front Wing 1800 | 1,800 | -4.3% | 9.25 | +0.5% | 1,290 | C3 Mid aspect |
| GONG | Trail V3 XL | 1,940 | +3.2% | 9.40 | +2.2% | 1,350 | C3 Mid aspect |
| RRD | Universal Moonfish Front Wing Y30 1900 | 1,900 | +1.1% | 9.60 | +4.3% | 1,350 | C4 High aspect |
| North | Sonar P1800 P1800 | 1,800 | -4.3% | 9.40 | +2.2% | 1,300 | C3 Mid aspect |
| Sabfoil | Leviathan 1350 Leviathan 1350 | 1,870 | -0.5% | 9.75 | +6.0% | 1,350 | C4 High aspect |
| Sabfoil | Leviathan Blackbird The 1350 Leviathan Blackbird "The 1350" | 1,864 | -0.9% | 9.80 | +6.5% | 1,350 | C4 High aspect |
| Family | APF |
|---|---|
| Size | APF1880 |
| Area, cm² | 1,880 |
| Area basis | unknown |
| Span, mm | 1,302 |
| Chord, mm | — |
| Aspect ratio | 9.20 |
| Band | C3 Mid aspect |
| Brand files it under | Pump / dock |
| Disciplines | pump |
| 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.