Pipistrel originated in mid-1980s when partners Ivo Boscarol and Bojan Sajovic began building flex-wing trikes. First major design was Ajdovščina, of which 32 built between 1989 and December 1992, including exports to Italy (these first private Yugoslav exports of light aircraft). Also began producing ground-adjustable pitch propellers, of which 1,400 built by 2000. Pipistrel Plus flex-wing entered production in 1990; more than 200 now sold. Supplied flex-wings to Croatian Army in 1991. Spider flex-wing entered production in 1992; more than 15 produced. Company formally established as Pipistrel d.o.o. on 18 November 1992 and supplied flex-wings to Italian Army's special forces in following year. Twister flex-wing introduced 1998. Moved to new premises at Ajdovščina aerodrome (Slovenia) in 2001.