Three brothers, Edward, Paul and Wojciech Sopora set up an aircraft-building workshop in 1923 at Chorzów, calling it the Pierwsza Śląska Fabryka Samolotów (First Silesian Aircraft Factory).
The forward part was a fabric-covered steel tube structure but behind the cockpit, just ahead of the trailing edge, wood frames and plywood covering were used.
Its fixed, tailskid undercarriage was similar to that of the S-3, with large mainwheels on a single axle supported at each end by V-struts from the lower longerons.
It was soon busy, giving a demonstration to representatives of an infantry regiment and taking part in a series of publicity flights to Silesian towns during a L.O.P.P air-awareness week.
Encouraged by the interest of the club fliers in the S-4, they had designed a 60 kW (80 hp), two seat, aerobatic training and touring aircraft, the Silesia S-10, the construction of which was funded by the Silesian Aeroclub.