In what year did Otto Lilienthal's flight attempts begin?
1895
1890
1891
1885
Answer
Otto Lilienthal's flight attempts began in 1891, when he built and flew a series of gliders from a hill near Berlin. He was the first person to make controlled, sustained flights in a glider, and his work laid the foundation for the development of heavier-than-air flight.
Flight of the Eagle: Testing Your Knowledge on Otto Lilienthal, the German Aviation Pioneer