Wikipedia
Ivchenko-Progress
Ivchenko-Progress ZMKB (, Zaporizhia Machine-Building Design Bureau "Progress" State Enterprise named after Academician O.H.Ivchenko), formerly OKB-478 and Ivchenko Lotarev, is a state design bureau for aircraft engines in Zaporizhia, Ukraine whose products are widely used in both civil and military aircraft, most notably by Antonov, Beriev, Ilyushin, Tupolev, Mil and Yakovlev. Also PZL-Mielec has used a Progress engine in one of their cropdusters. Both the largest plane in the world, the An 225 and the largest helicopter, the Mi-26, are powered by Lotarev engines. The bureau is administered by the Ukrainian Defense Industry and the Ministry of Industrial Policy.