Aircraft engine: Praga Doris M-208B (Doris BI)
|Displacement||7.16 l (421 cu in)|
|Propeller reduction gear ratio||0.55|
|Weight||214 kg (742 lb)|
|Maximum power||220 hp at 3,000 RPM|
|Climb power||200 hp at 2,900 RPM|
An engine designed by a team led by Eng. Krulisz of Motorlet (former Walter) factory. Many technical difficulties occurred during the designing and assembly of the prototype. The state trials were conducted in 1955 and subsequently the engine entered production. It was not a successful design, being unreliable and causing many operating problems. The engine was used in Aero L‑60 Brigadyr aircraft.