One of the movie producers was known engineer designer Edward Margański. In 1968, in Leszno, during the World Gliders Championships, Margański and his team of aviation specialists performed thorough revision of world glider designs in the Sixties, which competed with the domestic glider designs of the Polish People's Republic. Back then, “gliders from Bielsko, i.e. Szybowcowy Zakład Doświadczalny [Experimental Glider Factory] was one of the kind and the world's largest company designing and producing gliders, until the system and economy reform of the Nineties, which the company did not survive.