The Lilienthal Normalsegelapparat (Normal soaring apparatus) was a glider that was developed by Otto Lilienthal in Germany in the late 19th Century. It is considered to be the first serial production of an aeroplane (1893–1896). Today 9 buyers are in particular known e. g. Nikolai Zhukovsky and William Randolph Hearst. Four original normal gliders are preserved in museums. A similar glider Sturmflügelapparat (storm wing model) is preserved in Vienna.
Made by Otto Lilienthal.