Armstrong APF (All-round Pump Foil) APF1675 hydrofoil front wing: 1,675 cm², 1,202 mm span, aspect ratio 8.60, 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 |
|---|---|---|---|---|---|---|---|
| ENSIS | STRIDE ACE Front Wing 1740 | 1,740 | +3.9% | 9.10 | +5.8% | 1,260 | C3 Mid aspect |
| Takoon | Pump One Front Wing 1600 | 1,600 | -4.5% | 9.15 | +6.4% | 1,210 | C3 Mid aspect |
| F-One | SEVEN SEAS Carbon SEVEN SEAS 1600 | 1,600 | -4.5% | 8.00 | -7.0% | 1,130 | C2 Mid-low aspect |
| Family | APF |
|---|---|
| Size | APF1675 |
| Area, cm² | 1,675 |
| Area basis | unknown |
| Span, mm | 1,202 |
| Chord, mm | — |
| Aspect ratio | 8.60 |
| 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.