| Manufacturer | Rutan, Scaled Composites |
| Model | Proteus |
| Modification | Proteus |
| Country | USA |
| Years | 1998 |
| Type | Experimental aircraft |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | - |
| Length | 17.14 m |
| Height | 5.33 m |
| Wing area | 44.50 m2 |
| Zero fuel weight | - |
| Empty weight | 2660 kg |
| Maximum takeoff weight | 6440 kg |
| Normal takeoff weight | 5670 kg |
| Flight duration | - |
| Engine | 2 Williams-Rolls FJ44-2E |
| Power | - |
| Thrust | 2 x 10.22 kN |
| Maximum speed | 518 km/h |
| Cruising speed | 351 km/h |
| Rate of climb | 1800 m/min |
| Practical range | - |
| Service ceiling | 19510 m |
| Hovering ceiling | - |
| Crew | - |
