Schraubenflieger

(Papin and Rouilly)

The "Schraubenflieger" (Gyroptère) was designed in 1913–1914 by Alphonse Papin and Didier Rouilly in France, inspired by a maple seed. Papin and Rouilly obtained French patents 440,593 and 440,594 for their invention, and later obtained US patent 1,133,660 in 1915. The Gyroptère was characterized in the contemporary French journal La Nature in 1914 as "un boomerang géant" (a giant boomerang).