The Flying Ship(1979)

Poor chimney sweep Ivan and Princess Zabava fall in love with each other. They dream of their future happy life, but the difference in their social status and the treacherous Polkan, who dreams of marrying a royal daughter and becoming a ruler, stand in their way. To avoid marriage with the royal adviser, Zabava informs that she will marry only the one who can build a flying ship. Now Ivan has to solve this problem by all means.