Armstrong S1 (Step 1) 1550
- 1,550area, cm²
- 905span, mm
- 5.30aspect ratio
- Lowaspect · AR ≤ 6.0
Family S1 Brand’s category Entry Disciplines wing, prone carbon · 2025-2026
The closest current wings from other brands — every one within ±5% of area and ±8% of aspect ratio, ranked closest first. The closest, the Takoon Starter Front Wing 1600, is already drawn over it. Select a numbered wing to draw it — up to three at a time.
The S1 runs 4 sizes, 1,250–2,450 cm²; aspect ratio moves 4.8–5.7 across the range.
Its 905 mm span is 20% narrower than typical for the area — the median across the 75 current wings within 10% of its size is 1,130 mm.
Closest wings from other brands
Projected and flat area run 3–8% apart. A marked area is one whose brand does not state which it publishes, so a comparison inside the area tolerance may be comparing unlike figures.
| Brand | Wing | Area cm² | Δ area | Aspect ratio | Δ AR | Span mm | Band |
|---|---|---|---|---|---|---|---|
| Takoon | Starter Front Wing 1600 | 1,600 | +3.2% | 5.50 | +3.8% | 940 | Low aspect |
| Takuma | Kujira Helium Front Wing 1500 | 1,500 | -3.2% | 5.50 | +3.8% | 910 | Low aspect |
| North | Sonar MA1500v2 | 1,500 | -3.2% | 5.60 | +5.7% | 920 | Low aspect |
Specifications
| Family | S1 |
|---|---|
| Size | S1 1550 |
| Area, cm² | 1,550 |
| Area basis | unknown |
| Span, mm | 905 |
| Chord, mm | — |
| Aspect ratio | 5.30 |
| Band | Low aspect |
| Brand’s category | Entry |
| 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.
Data current to August 2026. Every figure above is the manufacturer's published claim, converted to comparable units.