Armstrong UHA (Ultra High Aspect) UHA670 hydrofoil front wing: 670 cm², 919 mm span, aspect ratio 12.60, 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 |
|---|---|---|---|---|---|---|---|
| Code Foils | R Series Front Wing 680R | 680 | +1.5% | 13.00 | +3.2% | 935 | C5 Very high aspect |
| Axis | Fireball ULTRA Fireball 940 | 689 | +2.8% | 12.84 | +1.9% | 940 | C5 Very high aspect |
| Axis | ART PRO ART PRO 901 | 686 | +2.4% | 12.04 | -4.4% | 901 | C5 Very high aspect |
| F-One | EAGLE X UHM Carbon EAGLE X 700 | 700 | +4.5% | 12.00 | -4.8% | 915 | C5 Very high aspect |
| Family | UHA |
|---|---|
| Size | UHA670 |
| Area, cm² | 670 |
| Area basis | unknown |
| Span, mm | 919 |
| Chord, mm | — |
| Aspect ratio | 12.60 |
| Band | C5 Very high aspect |
| Brand files it under | Glide / high aspect |
| Disciplines | — |
| Construction | carbon |
| 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 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.