An engine designed for light aircraft. It was developed at the Praga factory in 1936, but entered large-scale production after World War II. It was used in the Zlin Z-22 Junak and Mraz M-2 Skaut aircraft.
| Configuration | 4-cylinder horizontally opposed (boxer) |
| Cooling | air |
| Compression ratio | 6.1 |
| Displacement | 2.93 l |
| Weight | 67 kg |
| Maximum power | 75 hp at 2650 rpm |
