He became a member of the Polish Socialist Party - Revolutionary Fraction, as well as the Polish Rifles and the Sokół movement.
He was born Kazimierz Łukoski in 1890, in the village of Sokół near Garwolin, in the Siedlce Governorate of the Russian Empire (in the Masovian Voivodeship of present-day Poland).
The movement also spread across all the regions populated by the Slavic culture (Poland (Sokół)), Slovene Lands, Serbia (SK Soko), Bulgaria, the Russian Empire (Poland, Ukraine, Belarus), and the rest of Austria-Hungary such as Slovenia and Croatia.
Development began in January 1958 as the SZD-21 Sokół, but due to problems with the flying surfaces and a wood metal sandwich, a construction of the design was restarted as the SZD-21 Kobuz (Eurasian Hobby).