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Hang glider sheet: Firebird| Model: | S A | S B |
| Wing area (m²): | 17.70 | 20.46 |
| Wing span (m): | 8.50 | 9.20 |
| Aspect ratio: | 4.12 | 4.12 |
| Hang glider weight (kg): | 23 | 25 |
| Minimal pilot weight (kg): | 60 | 70 |
| Maximal pilot weight (kg): | 76 | 95 |
| Minimal speed (km/h): | 25 | 25 |
| Maximal speed (km/h): | 50 | 50 |
| Maximal glide ratio (L/H): | 6 | 6 |
| Speed at maximal glide ratio (km/h): | 33 | 33 |
| Minimal sink rate (m/s): | 1.40 | 1.40 |
| Packed length (m): | 4.25 | 4.60 |
| Packed length short (m): | 4 | 4.20 |
| Number of battens | - | - |
| Nose angle (°): | 100 | 100 |