| Manufacturer | Letov |
| Model | S.3 |
| Modification | S.3 |
| Country | Czechoslovakia |
| Years | 1922 |
| Type | Fighter |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 10.13 m |
| Length | 7.08 m |
| Height | 3.04 m |
| Wing area | 17.60 m2 |
| Zero fuel weight | - |
| Empty weight | 662 kg |
| Maximum takeoff weight | - |
| Normal takeoff weight | 928 kg |
| Flight duration | - |
| Engine | 1 BMW IIIa |
| Power | 1 x 185 HP |
| Thrust | - |
| Maximum speed | 225 km/h |
| Cruising speed | 195 km/h |
| Rate of climb | 508 m/min |
| Practical range | 472 km |
| Service ceiling | - |
| Hovering ceiling | - |
| Crew | - |
