It was designed by Jaroslav Košer and Stojan Hrovat, then students of the Ljubljana Technical Faculty (Tehniška fakulteta v Ljubljani) of the University of Ljubljana. The first flight was in 1948. The detailed description was published in the Yugoslavian aviation magazine Narodna Krila (People's Wings) in 1949.[1]
The goal of the design team was to create the new Olympic glider for OSTIV (Organisation Scientifique et Technique du Vol à Voile), in competition with the DFS Meise (which won), amongst others.