The plane was a wooden low-wing monoplane, with two seats side-by-side in a closed cockpit, powered by 50 hp Walter Mikron I straight engine.

Test revealed lack of directional stability, therefore its rudder was much enlarged, the wings were fitted with fixed slats and a windshield was redesigned.

It did not improve the situation much, and in 1937-1938 the prototype was rebuilt and fitted with stronger 60 hp Avia 3 engine in a lengthened nose, while the vertical stabilizer and rudder were made smaller.

[1] Wooden construction low-wing cantilever monoplane, conventional in layout, with a fixed landing gear and a closed cockpit.

[1] 50 hp (37 kW) Walter Mikron I inline engine in front, with two-blade wooden propeller Szomański, 1.8 m diameter.