In order to replace its obsolete pilot training aircraft, the Zmaj Fizir FN biplane, the Yugoslav Royal Air Force (YRAF) Command held a competition in mid-1936 to develop a new aircraft for training pilots.
The Rogožarski Factory decided to participate in the competition and engaged two well-known aerospace engineers, Miroslav Nenadović and Mitrović Milenko-Spirta, who began working on the design.