| Manufacturer | Stahlwerk Mark |
| Model | R-IIIb |
| Modification | R-IIIb |
| Country | Poland |
| Years | 1925 |
| Type | Other |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 7.65 m |
| Length | 5.20 m |
| Height | 2.00 m |
| Wing area | 11.00 m2 |
| Zero fuel weight | - |
| Empty weight | 260 kg |
| Maximum takeoff weight | - |
| Normal takeoff weight | 365 kg |
| Flight duration | - |
| Engine | 1 Stahlwerk Mark FII |
| Power | 1 x 39 HP |
| Thrust | - |
| Maximum speed | 105 km/h |
| Cruising speed | 85 km/h |
| Rate of climb | - |
| Practical range | 300 km |
| Service ceiling | 2000 m |
| Hovering ceiling | - |
| Crew | 1 |
