Despite this opposition, support from Stanojević and some younger pilots meant that the concept was approved, and in 1934 a prototype was ordered from the Ikarus A.D. factory in Zemun near Belgrade, for delivery by the end of that year. The prototype was designated IK-1, with the "IK" standing for (Ljubomir) Ilić and Kosta (Sivčev). It is believed that the prototype was complete by September 1934, but the first flight was delayed due to concerns about the wing structure. The following month, Bajdak was appointed as test pilot for the prototype, but he did not co-operate in the preparations for the maiden flight, and decided to develop his own test program.