| Manufacturer | Grumman |
| Model | G-21 Goose |
| Modification | G-21A |
| Country | USA |
| Years | 1937 |
| Type | Flying boat |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 14.94 m |
| Length | 11.68 m |
| Height | 4.57 m |
| Wing area | 34.84 m2 |
| Zero fuel weight | - |
| Empty weight | 2461 kg |
| Maximum takeoff weight | - |
| Normal takeoff weight | 3608 kg |
| Flight duration | - |
| Engine | 2 Pratt Whitney R-985-AN6 Wasp Junior |
| Power | 2 x 450 HP |
| Thrust | - |
| Maximum speed | 323 km/h |
| Cruising speed | 307 km/h |
| Rate of climb | - |
| Practical range | 1030 km |
| Service ceiling | 6400 m |
| Hovering ceiling | - |
| Crew | 2 |
