Oleksii Mykolaiovych Hratsianskyi (1905 - 1987)
Aircraft designer, Hero of the Soviet Union, test pilot of the first class, PhD in Geography.
Gratsianskiy Olexiy: Aviation As A Way of Life
At the Berlin International Air Expo 1928, the visitors' general curiosity was attracted by the world's first ever medical aircraft, the K-3, designed by Konstantin Kalinin and presented by the Kharkiv Aircraft Factory.