| Manufacturer | Letov |
| Model | S.231 |
| Modification | S.231 |
| Country | Czechoslovakia |
| Years | 19 |
| Type | Fighter |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 10.06 m |
| Length | 7.80 m |
| Height | - |
| Wing area | 21.50 m2 |
| Zero fuel weight | - |
| Empty weight | 1280 kg |
| Maximum takeoff weight | - |
| Normal takeoff weight | 1770 kg |
| Flight duration | - |
| Engine | 1 Walter (Bristol) Mercury |
| Power | 1 x 560 HP |
| Thrust | - |
| Maximum speed | 348 km/h |
| Cruising speed | 310 km/h |
| Rate of climb | 588 m/min |
| Practical range | 450 km |
| Service ceiling | 9300 m |
| Hovering ceiling | - |
| Crew | - |
