In 1929 it set a new national duration record and flew successfully until the end of 1931, when several major structural and aerodynamic modifications improved its performance.
Revived after World War I, by 1926 it had workshops in Lwów which began building the glider designs of ZASPL member Wacław Czerwiński.
Both were high wing, wooden, open frame gliders, though only the CW II had a nacelle enclosing the pilot's cockpit.
[1][2] The centre-section was mounted just above the upper longeron, or chord, of the flat girder fuselage on four outward leaning inverted-V struts.
It proved easier to fly than the higher-performing CW II and well suited for its intended basic training role,[1][4] After successful operation between 1929 and 1931, the sole CW-II was considerably modified during the winter of 1931-2.
In the following spring they returned to Bezmiechowa with some thirteen novices, including the first two female Polish glider pilots, Danuta Sikorzaanka and Wanda Olszewskz.