April 22, 1876
The first successful testing of April glider designed by Otto Lilienthal, a pioneer in human aviation.
Berlin, Germany | Personal endeavor of Otto Lilienthal
It appears there might be some confusion regarding the date and event details surrounding Otto Lilienthal’s work. Otto Lilienthal, a significant pioneer in human aviation, is best known for his successful glider flights, which primarily occurred in the early 1890s.
Lilienthal conducted extensive research and glider experiments, notably accelerating between 1891 and 1896. It was during this period that he made significant advances in controlled flight, particularly with his monoplane glider designs, which he extensively tested and refined. His work laid a crucial foundation for future aeronautical developments.
If you were referencing a successful flight or a particular design milestone by Otto Lilienthal from another source, it’s essential to cross-check that date and event for historical accuracy, as traditionally documented gliding successes are indeed recorded to have happened later in his career.
Source: www.centennialofflight.net