Positive reactions from both LOPP and the Kraków Academic Aeroclub led to the parallel construction of three airframes in the workshops of the local Air Regiment, differing primarily in their engines.

[2] The second airframe flew in September 1930, initially known as the S.2 and fitted with a 60 kW (80 hp) Avia W.Z.7, a Polish seven cylinder radial engine.

The landing leg, which incorporated a compressed rubber shock absorber, was hinged from the upper longeron.

Despite its good performance, the lack of an established manufacturing facility for this amateur design prevented its military adoption.

It also served as a reliable and forgiving club trainer, the small production numbers reflecting the failure to find an established constructor for the aircraft rather than its qualities.