The Derwitzer Glider was a glider that was developed by Otto Lilienthal, so named because it was tested near Derwitz in Brandenburg. When flown in 1891, it became a very early successful design able to carry a person and the one of the first successful manned aircraft in the world. He made flights of up to 25 metres (80 feet) in it. Specifications References Otto Lilienthal Museum website Centennial of Flight website 19th-century German experimental aircraft Lilienthal aircraft Glider aircraft Aircraft first flown in 1891 1891 in Germany 1891 in science Monoplanes