UL Aviation is the Ukrainian -Finnish Company, a developer and manufacturer of GAProp ground adjustable propellers for flying vehicles equipped with piston engines of 30 to 200 hp.

UL Aviation is in close cooperation with the leading Ukrainian Aviation Engineering-Design Offices and Institutions being engaged in development and design of different aircrafts. The Ukrainian An-70, An-148 and An-140 aircrafts were developed and designed at these offices.