| Manufacturer | Hughes |
| Model | H-4 (HFB-1) Hercules |
| Modification | H-4 |
| Country | USA |
| Years | 1947 |
| Type | Search and rescue aircraft |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 97.54 m |
| Length | 66.45 m |
| Height | 24.08 m |
| Wing area | 1061.88 m2 |
| Zero fuel weight | - |
| Empty weight | - |
| Maximum takeoff weight | 136078 kg |
| Normal takeoff weight | - |
| Flight duration | - |
| Engine | 8 Pratt Whitney R4360-4A |
| Power | 8 x 3000 HP |
| Thrust | - |
| Maximum speed | 351 km/h |
| Cruising speed | 282 km/h |
| Rate of climb | - |
| Practical range | 5633 km |
| Service ceiling | 7165 m |
| Hovering ceiling | - |
| Crew | 5 |
