NACA cowling
Single engine in front: 9-cylinder air-cooled Polish Skoda Works Wright Whirlwind J-5 radial engine delivering 240 hp (179 kW) take-off power and 220 hp (164 kW) nominal power, with a NACA cowling, driving a two-blade metal propeller of a fixed pitch. A 300-litre fuel tank was fitted in wing and 150-litre under the cab (normal capacity was 200 L). The cruise fuel consumption was 40–50 L/h.