MACDONALD S-21 vs Alpavia RF-3
Side-by-side aircraft model specifications (max across variants).
| Spec | MACDONALD S-21 | Alpavia RF-3 |
|---|---|---|
| ICAO type | S21 | RF3 |
| MTOW | 400 kg | 400 kg |
| Range | 250 nm | 280 nm |
| Cruise speed | 78 kt | 95 kt |
| Service ceiling | — | 16,500 ft |
| Max seats | 1 | 1 |
| Length | 6 m | 6 m |
| Wingspan | 8 m | 11 m |
MACDONALD S-21
Alpavia RF-3