Stelmaszyk S.1 Bożena

After some public ceremony and a donation of motoring petrol from a local clergyman, Jozefat Skrzypek, a pilot from the Polish Airmen's Association, took it on its first flight on 6 December 1928.

[1] The Bożena was powered by a 35 hp (26 kW) Anzani 2A three-cylinder radial engine mounted with its cylinders exposed for cooling in a strongly tapered nose.

[1][2] Its fixed landing gear was simple and conventional, with steel V-struts from the lower fuselage longerons and a single axle with rubber shock absorbers.

[1] Early test flight reports noted the Bożena's combination of stability in windy conditions with good control responsiveity and manoeuvreability.

It isis known to have made five flights in the winter of 1928–9, some on skis, and it also won a cash prize large enough to cover all costs, including that of the engine.