| Manufacturer | Klemm |
| Model | L-20 |
| Modification | L-20 |
| Country | Germany |
| Years | 1923 |
| Type | Light aircraft |
| Main rotor diameter | - |
| Tail rotor diameter | - |
| Wingspan | 13.00 m |
| Length | 7.00 m |
| Height | 1.95 m |
| Wing area | 20.00 m2 |
| Zero fuel weight | - |
| Empty weight | 265 kg |
| Maximum takeoff weight | 450 kg |
| Normal takeoff weight | - |
| Flight duration | - |
| Engine | 1 Mersedes |
| Power | 1 x 20 HP |
| Thrust | - |
| Maximum speed | 105 km/h |
| Cruising speed | 95 km/h |
| Rate of climb | - |
| Practical range | 480 km |
| Service ceiling | 4100 m |
| Hovering ceiling | - |
| Crew | 2 |
