In June 1958 Yugoslavia purchased two examples of the private-venture Gnat for evaluation, both being delivered by rail. They were flown by the flight test centre but one was written off in a belly landing after a hydraulics failure in October 1958. Although at one stage there was interest in licence production of up to 700 single and two-seater Gnats, no further aircraft were ordered and second-hand F-86 Sabres were acquired instead