| Manufacturer | Letov |
| Model | S-1(2) |
| Modification | S-2 |
| Country | Czechoslovakia |
| Years | 1920 |
| Type | Other |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 13.02 m |
| Length | 8.52 m |
| Height | 3.31 m |
| Wing area | 36.17 m2 |
| Zero fuel weight | - |
| Empty weight | 970 kg |
| Maximum takeoff weight | - |
| Normal takeoff weight | 1492 kg |
| Flight duration | - |
| Engine | 1 Maybach Mb.IVa |
| Power | 1 x 260 HP |
| Thrust | - |
| Maximum speed | 198 km/h |
| Cruising speed | 167 km/h |
| Rate of climb | - |
| Practical range | - |
| Service ceiling | 6500 m |
| Hovering ceiling | - |
| Crew | - |
