| Bi 4 2 | 42 | |
| 2018 | ||
| In-Flight-Weight | kg | 120 - 220 |
| Main-Use | Tandem | |
| Certifications | ||
| Naked-Pilot | kg | 90 - 190 |
| Wing-Load | kg/m² | 2,9 - 5,2 |
| Wing-Weight | kg | 7,8 |
| Area | m² | 42,00 |
| Area proj | m² | 36,79 |
| Span | m | 14,78 |
| Span proj | m | 12,06 |
| Ratio | 5,20 | |
| Ratio proj | 3,95 | |
| Rows | 4 | |
| Boxes | 29 | |
| Cells | 54 | |
| Closed Cells | 8 | |
| Lines Ø diam. | 2,1 mm; 1,5 mm; 1,2 mm; 1,0 mm | |
| Lines distance | m | 8,72 |
| Lines total | ||
| Flattening | % | 12 |
| Accelerated speed | km/h | 48 |
| Basic speed | km/h | 40 |
| Minimum speed | km/h | 25 |
| Best-Sink-Rate | m/s | 1,2 |
| Best-Glide-Ratio | ||
| GR/Fmax Estimations | p | 9,0 |
| Upper-Surface | Dokdo N30DFM 38 g/m² | |
| Under-Surface | Dokdo N30DFM 38 g/m² | |
| Lines type | Cousin; Edelrid | |
| Risers | 4(4A/4B/5C/3D) | |
| Accelerator | No | |
| Trims | cm | 9 |
| Ears | 3m/s | |
| B Lines | 8m/s |