| Manufacturer | Letov |
| Model | S.12 |
| Modification | S.12 |
| Country | Czechoslovakia |
| Years | 1924 |
| Type | Fighter |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 9.40 m |
| Length | 6.58 m |
| Height | - |
| Wing area | 15.55 m2 |
| Zero fuel weight | - |
| Empty weight | 673 kg |
| Maximum takeoff weight | - |
| Normal takeoff weight | 983 kg |
| Flight duration | - |
| Engine | 1 Hispano-Suiza 8Ba |
| Power | 1 x 220 HP |
| Thrust | - |
| Maximum speed | 180 km/h |
| Cruising speed | 150 km/h |
| Rate of climb | - |
| Practical range | 470 km |
| Service ceiling | 6000 m |
| Hovering ceiling | - |
| Crew | - |
