| Manufacturer | Westland |
| Model | Wyvern |
| Modification | Wyvern S.Mк.4 |
| Country | United Kingdom |
| Years | 1946 |
| Type | Fighter |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 13.42 m |
| Length | 12.82 m |
| Height | 4.58 m |
| Wing area | 32.97 m2 |
| Zero fuel weight | - |
| Empty weight | 7080 kg |
| Maximum takeoff weight | 11120 kg |
| Normal takeoff weight | 9620 kg |
| Flight duration | - |
| Engine | 1 Armstrong Siddeley Piton ASP.3 |
| Power | 1 x 3670 HP |
| Thrust | - |
| Maximum speed | 608 km/h |
| Cruising speed | 557 km/h |
| Rate of climb | 714 m/min |
| Practical range | 1460 km |
| Service ceiling | 8500 m |
| Hovering ceiling | - |
| Crew | 1 |
