| Sigma 7 | 23 | 26 | 28 | 31 | |
| 2008 | 2008 | 2008 | 2008 | ||
| In-Flight-Weight | kg | 60 - 80 | 70 - 95 | 85 - 110 | 100 - 130 |
| Main-Use | Cross | Cross | Cross | Cross | |
| Certifications | |||||
| Naked-Pilot | kg | 53 | 65 | 79 | 95 |
| Wing-Load | kg/m² | 3,0 | 3,2 | 3,5 | 3,8 |
| Wing-Weight | kg | 5,7 | 6,4 | 6,8 | 7,3 |
| Area | m² | 23,10 | 26,04 | 28,16 | 30,61 |
| Area proj | m² | 19,69 | 22,21 | 24,00 | 26,09 |
| Span | m | 11,42 | 12,13 | 12,61 | 13,15 |
| Span proj | m | 9,05 | 9,62 | 9,99 | 10,42 |
| Ratio | 5,65 | 5,65 | 5,65 | 5,65 | |
| Ratio proj | 4,16 | 4,16 | 4,16 | 4,16 | |
| Rows | 4 | 4 | 4 | 4 | |
| Boxes | 27 | 27 | 27 | 27 | |
| Cells | 61 | 61 | 61 | 61 | |
| Closed Cells | 14 | 14 | 14 | 14 | |
| Lines Ø diam. | 1,9 mm; 1,5 mm; 1,1 mm; 0,6 mm | 1,9 mm; 1,5 mm; 1,1 mm; 0,6 mm | 1,9 mm; 1,5 mm; 1,1 mm; 0,6 mm | 1,9 mm; 1,5 mm; 1,1 mm; 0,6 mm | |
| Lines distance | m | 7,40 | 7,86 | 8,17 | 8,52 |
| Lines total | 347 m | ||||
| Flattening | % | 15 | 15 | 15 | 15 |
| Accelerated speed | km/h | 55 | 55 | 55 | 55 |
| Basic speed | km/h | 39 | 39 | 39 | 39 |
| Minimum speed | km/h | 23 | 23 | 23 | 23 |
| Best-Sink-Rate | m/s | 1,1 | 1,1 | 1,1 | 1,1 |
| Best-Glide-Ratio | 1,2 m/s - 38 km/h | 1,2 m/s - 38 km/h | 1,2 m/s - 38 km/h | 1,2 m/s - 38 km/h | |
| GR/Fmax Estimations | 9,0 - 9,3 (9,3 p) | 9,0 - 9,3 (9,3 p) | 9,0 - 9,3 (9,3 p) | 9,0 - 9,3 (9,3 p) | |
| Upper-Surface | S9092-E117 44 g/m² | S9092-E117 44 g/m² | S9092-E117 44 g/m² | S9092-E117 44 g/m² | |
| Under-Surface | S9017-E77A 40 g/m² | S9017-E77A 40 g/m² | S9017-E77A 40 g/m² | S9017-E77A 40 g/m² | |
| Lines type | Technora; Aramid | Technora; Aramid | Technora; Aramid | Technora; Aramid | |
| Risers | 4(3A/3B/4C/2D) | 4(3A/3B/4C/2D) | 4(3A/3B/4C/2D) | 4(3A/3B/4C/2D) | |
| Accelerator | cm | 15 | 16 | 16 | 16 |
| Trims | No | No | No | No | |
| Ears | Yes | Yes | Yes | Yes | |
| B Lines | Yes | Yes | Yes | Yes |